Dumore 57 series User manual

DUMORE CORPORATION

Quality is our legacy

1030 Veterans Street, Mauston, WI 53948-9314

Telephone 608-847-6420 FAX 1-800-338-6673

884-0263

REV. 11/2019

29696

Printed in USA

TOOL POST GRINDERS

MODEL 8587-210

MODEL 8584-210

MODEL 8588-210

MODEL 8479

SERIES 57

PARTS LIST

AND

OPERATING

INSTRUCTIONS

www.dumoretools.com

INTRODUCTION

Dumore tool post grinders have an international reputation for quality and dependability. Our Series 57 will turn a standard

lathe or other machine tool into a versatile, accurate, internal-external grinder. Cylindrical parts can be machined and then

finished ground in the same set-up. The Series 57 can be mounted on the compound of a lathe in a matter of minutes.

Features include nine spindle speeds and coil spring applying constant belt tension assuring proper alignment. A wide

range of spindles are available for toolroom, maintenance and production line needs.

POLICY STATEMENT

Dumore Corporation is committed to providing products that meet the ever expanding needs of our customers. It is our goal

to be the continuing leader in product quality, safety, and reliability.

TABLE OF CONTENTS

Introduction, Policy Statement Page 2

Safety Instructions Page 3 - 4

Specifications Page 5

Rules for Safe Grinding Page 6 - 7

Mounting Criteria Page 7

Safety Warnings Page 8

Set-Up Instructions Page 9 - 11

Face Grinding Page 12

Internal Grinding Page 12

Wheel Dressing Page 12

Selecting the Proper Wheel Page 12

Selecting the Proper Spindle Page 13 - 15

Grinding Wheel Listing Page 16 - 17

Pulley & Belt Combination Chart Page 18

Maintenance Instructions Page 18

Exploded View Page 19

Parts Listing Page 20 - 22

Mounted Wheel Chart Page 23

Warranty Page 24

Authorized Repair Centers Page 24

READ AND SAVE THESE INSTRUCTIONS!!

THE NEED FOR GROUNDING

In the event of a malfunction or breakdown, grounding provides

a path of least resistance for the electric current to reduce the

risk of electric shock. This tool is equipped with an electric cord

having an equipment grounding conductor and a grounding

plug. The plug must be plugged into a matching outlet that is

properly installed and grounded in accordance with all local

codes and ordinances.

s Note: Do not modify the plug provided - if it will not fit the

outlet, have the proper outlet installed by a qualified

electrician.

Improper connection of the equipment-grounding conductor

can result in a risk of electric shock. The conductor with

insulation having an outer surface that is green, with or without

yellow stripes, is the equipment - grounding conductor. If repair

or replacement of the electric cord or plug is necessary, do not

connect the equipment-grounding conductor to a live terminal.

Check with a qualified electrician or serviceman if the grounding

instructions are not completely understood, or if in doubt as to

whether the tool is properly grounded.

Repair or replace damaged or worn cord immediately.

Periodically check the ground circuit of the cord for continuity.

The use of a ground-fault protected receptacles is

recommended.

s WARNING: THIS TOOL SHOULD ONLY BE USED WHERE

POINT OF OPERATION GUARDING DEVICES HAVE BEEN

PROPERLY INSTALLED SO THAT IT IS IMPOSSIBLE FOR

THE OPERATOR’S HANDS OR FINGERS TO REMAIN

WITHIN THE POINT OF OPERATION DURING THE ACTUAL

MACHINE CYCLE.

s WARNING: Read all instructions. When using electric

tools, basic safety precautions should always be used to

reduce the risk of fire, electric shock, and personal injury,

including the following:

1. ALWAYS USE SAFETY GLASSES

(ANSI Z87.1 with side shields or an equivalent).

Polycarbonate lenses have been found to provide better

impact resistance than glass lenses

2. WEAR PROPER APPAREL

No loose clothing, gloves, neckties, rings, bracelets, or

other jewelry to get caught in moving parts. Non slip

footwear is recommended. Wear protective hair covering

to contain long hair.

3. DO NOT USE IN DANGEROUS ENVIRONMENT

Do not use power tools in damp or wet locations, or expose

them to rain. Keep work area well lighted. Do not use tool in

presence of flammable liquids or gases.

4. KEEP WORK AREA CLEAN

Cluttered areas and benches invite accidents.

5. DO NOT OVER-REACH

Keep proper footing and balance at all times.

6. REDUCE THE RISK OF UNINTENTIONAL

STARTING

Make sure switch is in off position before plugging.

7. CHECK DAMAGED PARTS

Check for alignment of moving parts, breakage of parts,

mounting, and any other conditions that affect its

operation. A part that is damaged should be properly

repaired or replaced by an authorized service center

unless otherwise indicated elsewhere in this instructional

manual. DO NOT USE TOOL IF SWITCH DOES NOT

TURN IT ON AND OFF. HAVE DEFECTIVE SWITCHES

REPLACED BY AUTHORIZED SERVICE CENTER.

8. DISCONNECT TOOLS

When not in use, before servicing and when changing

accessories, such as grinding wheels, etc.

9. REMOVE KEYS AND WRENCHES

Form habit of checking to see that keys and adjusting

wrenches are removed from tool before turning it on.

10. MAINTAIN TOOLS WITH CARE

Keep tools sharp and clean for best and safest

performance. Follow instructions for lubricating and

changing accessories. Inspect tool cords daily and if

damaged, have repaired by authorized service facility.

Inspect extension cords before use and replace if

damaged. Keep handles dry, clean, and free of oil and

grease.

s SAFETY INSTRUCTIONS

FUSE INTACT

HOT LINE

THIS SYSTEM IS DANGEROUS!

Don’t act as a conductor—Make

sure the tool is grounded through

the cord.

GROUNDING

BLADE COVER OF

GROUNDED

OUTLET BOX

GROUNDING MEANS

COVER OF

GROUNDED

OUTLET BOX

19. DO NOT ABUSE CORD

Never carry tool by cord or yank it to disconnect from

receptacle. Keep cord from heat, oil and sharp edges.

20. USE RECOMMENDED ACCESSORIES

Consult this manual or any Authorized Dumore Distributor

for recommended accessories. The use of improper

accessories may cause risk of injury to persons.

21. SET-UP

Do initial set-up and adjustment at an empty station. Keep

hands and clothing out of path of tool.

22. LOCKOUT / TAGOUT

Whenever maintenance work is being done on electrical

equipment, the Lockout/Tagout Procedure as required by

OSHA standard

23. SAVE THESE INSTRUCTIONS

s THIS SYMBOL IS USED THROUGH OUT THE

MANUAL TO HIGHLIGHT POTENTIAL DANGERS

11. SECURE WORK

Use clamps, a vise or fixture to hold work. It’s safer than

using your hand and it frees both hands to operate tool.

12. USE RIGHT TOOL

Do not use tools or attachments to do a job it was not

designed for.

13. DO NOT FORCE TOOL

` It will do the job better and safer at the rate for which it was

designed.

14. NEVER LEAVE TOOL RUNNING UNATTENDED,

TURN POWER OFF

Do not leave tool until it comes to a complete stop.

15. KEEP CHILDREN AWAY

All visitors should be kept safe distance from work area.

Do not let visitors contact tool or extension cord.

16. STORE IDLE TOOLS

When not in use, tools, should be in dry, high or locked-up

place out of reach of children.

17. STAY ALERT

Watch what you are doing. Use common sense. Do not

operate tool when you are tired, under medication, or

under the influence of drugs or alcohol.

18. KEEP COVERS IN PLACE AND IN WORKING ORDER

SPECIFICATIONS

MODEL 8587-210

Motor: 1/2 HP Universal open type, fan cooled (with intake air

filter)

Power Supply: The Model 8587-210 Grinder is equipped with a

120 Volt Universal Motor. Be sure that the voltage of the power

supply agrees with the voltage shown on the motor nameplate.

Spindles: Interchangeable. Spindles are not included. See

spindle chart on page 14.

Grinding Speeds: 3,750 to 45,000 RPM

Grinding Wheel Capacity: 1/2” to 6” (Varies with quill used)

External Grinding Capacity: To 6” diameter wheels (Varies

with quill used)

Internal Grinding Capacity: 18” deep at diameter of 1-7/8”

(Varies with quill used)

Mounting: T-Bolt

Dimensions:

Center line of spindle to base - 1-1/8”

Center line of spindle to center line of mounting post - 1-3/4”

Weight: Ship Weight: 46 lbs, without spindle.

SERIES 57

SPECIFICATIONS

MODEL 8584-210 (w/intake Air Filter)

Motor: 3/4 HP Universal open type, fan cooled ventilation

Power Supply: The Model 8584-210 Grinder is equipped with a

high speed, universal motor which operates on 120 Volt, 60 Hz.

Be sure that the voltage of the power supply agrees with the

voltage shown on the motor nameplate.

Spindles: Interchangeable. Spindles are not included and

must be ordered separately. See spindle chart on page 14.

Grinding Speeds: 3,200 to 42,600 RPM

Grinding Wheel Capacity: 1/2”to 6” (Varies with quill used)

External Grinding Capacity: To 6” diameter wheels (Varies

with quill used)

Internal Grinding Capacity: 18” deep at diameter of 1-7/8”

(Varies with quill used)

Mounting: T-Bolt

Dimensions:

Center line of spindle to base - 1-1/8”

Center line of spindle to center line of mounting post - 1-3/4”

Weight: Ship Weight: 46 lbs, without spindle.

SPECIFICATIONS

MODEL 8588-210

MODEL 8479

Motor:

Model 8588-210 has a 1 HP Universal open type, fan cooled

(with intake air filter). Model 8479 has a 1 HP induction: totally

enclosed, fan cooled.

Power Supply: The Model 8588-210 Grinder is equipped with a

120 volt Universal motor. The Model 8479 Grinder is equipped

with a 220/380-440 volt, 3 Phase, 50-60 Hz. induction motor. Be

sure that the voltage of the power supply agrees with the voltage

shown on the motor nameplate.

Spindles: Interchangeable. Spindles are not included. See

spindle chart on page 14.

Grinding Speeds: Model 8588-210: 3,560 to 47,500 RPM

Model 8479: 3,600 to 32,600 RPM

Grinding Wheel Capacity: 1/2” to 6” (Varies with quill used)

External Grinding Capacity: To 6” diameter wheels (Varies

with quill used)

Internal Grinding Capacity: 18” deep at diameter of 1-7/8”

(Varies with quill used)

Mounting: T-Bolt

Dimensions:

Center line of spindle to base - 1- 1/8”

Center line of spindle to center line of mounting post - 1-3/4”

Weight: 8588-210: Ship Weight: 46 lbs, without spindle.

8479: Ship Weight: 58 lbs, without spindle.

s RULES FOR SAFE GRINDING

1. Always wear Suitable Safety Glasses

(ANSI Type Z87.1 with side shields or an equivalent) Also

wear a face or dust mask if grinding operation is dusty.

2. Always “Ring or Vibration Test” Straight Wheels

Before Use

Sound wheels produce a definite ring when struck lightly

with a non-metallic object - screwdriver handle, etc.

Cracked wheels produce a dull or dead sound. Suspend

the wheel from a hole using a small pin or finger and test

spots about 45 degrees apart around the wheel, see figure

2 below. Never use wheels that do not ring

satisfactorily. Damaged wheels should be replaced

immediately. The wheel hole should be suitably oversize

to assure safety clearance under normal operating heat

and pressure. Certain wheels require vibration testing. See

page 17 for vibration testing.

3. Always Use Proper Wheel Balance

Never exceed the speed on the blotter of a grinding wheel.

Never mount a wheel on a grinder without checking pulley

combinations to make sure the speed is safe for the wheel

diameter and type. Blotters should be large enough to

cushion flange pressure for the entire bearing surface of

the flange.

4. Only Use Flanges Furnished With The Grinder

Flanges must match on straight wheels. If flanges are not

the same diameter, the wheel is under a bending stress that

is likely to cause fracture. If they are not properly relieved,

pressure is concentrated on the sides of the wheel at the

hole, a condition which sets up tremendous stresses and

which may cause the wheel to break.

• Both flanges, between which a wheel is mounted,

should be the same diameter and properly relieved.

The minimum size of flanges for straight wheels should

be at least one-third of the diameter of the new wheel.

• Straight wheels must have an outer flange. Both

flanges serve a useful purpose, and neither should be

omitted. Flanges should be checked for distortion or

abrasion.

• The outer flanges must not be reversed. The raised

bearing surface (relieved side) must be against the

wheel. Otherwise, unequal bearing surfaces produce

the same effect as unmatched flanges.

• A flat washer, a steel punching, or any other type of

filler material must not be used in place of a properly

relieved flange as the bending stress imposed upon

the wheel may cause it to fracture (see figure 1).

5. Always Use A Wheel Cover on External Grinding Jobs

The wheel cover will minimize the possibility of accidental

contact with the wheel by the operator and will help confine

grinding dust and grit. It will also aid in protecting, but does

not provide total protection, for the operator should the

wheel explode. Damaged wheel guards should be

replaced immediately.

6. Do Not Over Tighten Wheel Nut. Over Tightening Of

The Wheel Nut May Spring The Flange.

A sprung flange can cause stress concentrations which

may break the wheel. Under tightening of the spindle end

nut can permit wheel slippage which may result in

breakage.

• Torque wrenches are not applicable to tightening

single end nuts because normal thread wear cause a

continual change in the relationship between torque

applied to the nut and flange pressure on the wheel.

• The direction of the thread shall be in such relation to

the direction of rotation that the nut will tend to tighten

as the spindle revolves. The following rule will assist in

determining the proper relationship: “To remove the

nut it must be turned in the direction that the

spindle revolves when the wheel is in operation”.

All threads of the wheel nut should engage when tight.

CORRECT INCORRECT

Figure 1

CORRECT AND INCORRECT METHOD OF

MOUNTING STRAIGHT WHEELS

WHEEL BLOTTERS

FLANGE RECESS

TOWARD WHEEL

WHEEL NUT THREADS

FULLY ENGAGED

SPINDLE

FLANGES UNIFORM IN

DIAMETER AND

BEARING SURFACE AREA

FLANGE NOT RECESSED

WHEEL NUT THREADS

NOT FULLY ENGAGED

NO WHEEL BLOTTERS

FLANGE SPRUNG FROM

EXCESSIVE WHEEL

NUT TORQUE

SPINDLE

ONE FLANGE LARGER

IN DIAMETER THAN

THE OTHER

Figure 2

7. Stand At One Side

When starting and during the first minute of run time.

8. Run At Full Operating Speed

With wheel cover in place for at least one minute before

applying work.

9. Always Remove Pulleys, Wheel And Adjusting

Wrenches From the Grinder When Not In Use.

This compels every operator to make the speed selection

for the wheel diameter they are using.

10. Always Store Wheels Safely

Store them where they are protected from jarring, falling, or

blows from other objects. Do not store wheel in the grinding

case. Protect wheels from high humidity and freezing

temperatures.

We Recommend That Dumore Wheels Be Used With

Dumore Grinders.

s This Symbol Is Used Throughout The Manual To

Highlight Potential Dangers

MOUNTING CRITERIA

The Series 57 Tool Post Grinder is designed for use on lathes

with a 9” to 20” swing. All tool post grinding is done with the

grinding spindle center adjustment to the exact height of the

work center. Therefore, the distance from the top of the

compound to the center line of the lathe spindle, “X,” (Figure 14)

must always be equal to or greater than the distance from the

base of a grinder frame to the center of the spindle (commonly

referred to as the minimum mounting distance). If this condition

does not exist, the grinder will not fit the lathe, because the

grinding spindle cannot be set at work center. If the grinder is

being used on one lathe specifically, a good time-saving idea is

to make a metal spacer plate to fit between the mounting post

base and the base of the grinder frame so the tool automatically

lines up with the work center.

Figure 2

WARNING

PART #

MAX RPM

DUMORE CORPORATION

1030 Veterans Street

Mauston, WI 53948

NEVER EXCEED MAXIMUM RPM

AS LISTED ON WHEEL BLOTTER.

NEVER EXCEED MAXIMUM WHEEL

SIZE FOR SPINDLE OR GRINDER

NEVER RUN WHEELS WITHOUT RING

TESTING OR VIBRATION TESTING

BEFORE EVERY USAGE.

NEVER RUN GRINDER WITHOUT

BELT GUARD IN PLACE

NEVER RUN GRINDER PRIOR TO

CHECKING PULLEY COMBINATION FOR

RPM LESS THAN MAXIMUM RPM LISTED

ON BLOTTER

sVIOLATION OF THESE AND OTHER SAFETY INSTRUCTIONS AS LISTED IN THIS MANUAL

CAUSE RISK OF SERIOUS PERSONAL INJURY.

NEVER DO EXTERNAL

GRINDING WITHOUT

WHEEL GUARD ATTACHED.

Figure 6

Figure 5

Figure 4

Figure 3

Setting Up On A Lathe

Before setting the grinder up on lathe, mount the workpiece either

in a chuck, collet or between centers. The Series 57 Tool Post

Grinder is designed to fit in the T-slot of a lathe compound.

SET UP INSTRUCTIONS

1. Remove the mounting post from the grinder by loosening

the lock nut on the right side of the frame and pulling the post

free. Insert the T-bolt of the mounting post into the T-slot of

the lathe compound and tighten nut at the top as illustrated

in Figure 3.

2. After the mounting post is tightened, set the lathe

compound at any angle listed on the Chart, Figure 7 on

page 10. The starred 60° angles setting seems to be ideal

as the feed is set at .001”, and the actual cut into the work is

.0005”, while the reduction in the diameter of the workpiece

is .0010”. The gradations on a lathe compound dial are in

thousands, and your work will often call for accuracies of

tenths of thousands. The chart will be helpful in determining

how much stock is being removed, the actual cut, and

approximately what reduction is being made in the diameter

of the work.

3. Slip the grinder onto the mounting post and tighten the lock

nut, see Figure 4.

4. Loosen the two screws on the front of the grinder and insert

the grinding spindle into the grinder with the strip pin on the

grinding spindle engaged in the slot in the grinder. A

screwdriver may be used to temporarily expand the slotted

frame while inserting the spindle. Tighten the two screws on

the front of the grinder.

5. Loosen the lock nut and position the tool so that the spindle

is parallel with the workpiece. Set the center line of the

spindle at the center line of the workpiece and tighten the

lock nut. the tail stock center can be used to center the

spindle accurately.

6. Select the proper pulleys for the size of the grinding wheel

which is to be used and install the pulleys on the motor and

grinding spindle as shown in Figure 5. The proper pulley

combination is shown on the speed chart which is fixed on

the motor or belt guards. Check the speed chart each time

for proper pulley recommendations for each wheel size.

s WARNING: DO NOT EXCEED WHEEL SPEED

RECOMMENDATIONS, OR THE WHEEL COULD

EXPLODE.

s Caution: Do not plug grinder into the power source

until the grinder is completely set up and ready to grind.

The wheel cover is assembled to the grinder by slipping it over the

grinding spindle and tightening the screw as illustrated in Figure

6. First mount the wheel guard to the spindle. Next mount the

wheel flanges and proper wheel to the spindle. And lastly

assemble the wheel guard cover.

s WARNING: DO NOT EXCEED MAXIMUM RECOMMENDED

WHEEL SPEEDS AS MARKED ON EACH GRINDING WHEEL.

RING TEST EACH WHEEL FOR CRACKS PRIOR TO

ASSEMBLY ON THE SPINDLE. OBSERVE CAREFUL

HANDLING AND STORAGE OF GRINDING WHEELS. RUN AT

FULL OPERATING SPEED WITH WHEEL COVER IN PLACE

FOR AT LEAST ONE MINUTE BEFORE APPLYING WORK.

DURING THIS TIME, AND PARTICULARLY WHEN STARTING,

THE OPERATOR SHOULD STAND AT ONE SIDE.

Figure 10

NOTE: Before mounting the wheel, make certain that it is sound

and free of fractures; and it is equipped with proper wheel

blotters. This is done by ring testing the wheel to make

certain that it has not been damaged from improper

handling or improper storage. To do this tap the wheel

gently with a light non-metallic implement such as the

handle of a screwdriver or a rawhide mallet. (See “Rules for

Safe Grinding”). If the wheel sounds cracked or dead it

should not be used and should be thrown away.

7. Tap the wheel about 45° each side of the vertical center line,

and about 1” or 2” from the periphery. Rotate the wheel 45°

and repeat the test. A sound and undamaged wheel will give

a clear metallic tone or ring. If cracked, there will be a dead

sound - not a clear ring. The wheel can be suspended from

the hole by a small pin or finger. This test should be made

prior to mounting a new or used wheel, or if damage is

suspected.

8. Mount the wheel between wheel collars on the grinding

spindle. The relieved side of the collar should be towards

the grinding wheel on both sides. (See “Rules For Safe

Grinding”). With one wheel collar on each side of the wheel,

tighten the wheel and pulley nut. Do not tighten this

spindle nut, since this may cause excessive stresses

on the grinding wheel. A moderate tightness will suffice.

s WARNING: ALWAYS USE THE WHEEL COVER ON

EXTERNAL GRINDING OPERATIONS.

s NOTE: THE WHEEL COVER WILL MINIMIZE THE

POSSIBILITY OF ACCIDENTAL CONTACT WITH THE

WHEEL BY THE OPERATOR AND WILL CONFINE

GRINDING DUST AND GRIT. IT WILL ALSO AID IN

PROTECTING, BUT DOES NOT PROVIDE TOTAL

PROTECTION FOR THE OPERATOR, SHOULD THE

WHEEL EXPLODE.

9. The Series 57 Tool Post Grinder has automatic belt

adjustment by means of a tension spring. Since the motor

pivots on a tension shaft, the belt can be installed by

pushing the motor forward and slipping the belt over the

pulleys. By releasing the motor, the belt automatically

becomes taut. Attach belt cover hanger to frame and add

belt cover as shown in Figure 8.

10. At this point the grinder has not been plugged into the power

source. Make certain the switch is in the “OFF” position.

Spin the wheel mounted on the grinding spindle by hand to

make certain everything is free and in clearance.

s Check to make sure the supply voltage is correct. A 115 Volt

grinder plugged into a 230 VOLT socket would substantially

over-speed the motor and grinding spindle and could result

in an excessive speed which would cause the wheel to

break. After verifying the voltage, plug the cord, into a

suitable grounded outlet.

Figure 9

Figure 8

Angle Setting of

Lathe Compound

Feed On

Compound in Inches

Actual Cut Taken

Into The Work

Reduction in

Work Diameter

30°

45°

*60°

70°

75°

80°

84°

.001

*.001

.001

.00087

.00071

*.00050

.00034

.00026

.00017

.00010

.00173

.00141

*.00100

.00068

.00052

.00035

.00021

Figure 7

Figure 11

Figure 12

Figure 13

10. Before either diamond dressing the wheel or before

applying it to the work, turn the unit on and stand clear (from

in line with the grinding wheel) and allow the grinding wheel

to run at full operating speed for at least one minute.

11. Dress the wheel to make the grinding face parallel with the

workpiece. This is done by clamping the diamond dresser to

the workpiece as illustrated in Figure 9. This is for external

grinding. Dressing for internal grinding is described later.

Turn the grinder switch on and make a very light pass over

the diamond nib using the hand wheel traverse. Make

several passes back and forth over the nib without resetting

depth dial. Since wheels are costly and have to be replaced

as they wear down, always take a very light pass over the

diamond nib. For precision grinding of all kinds, truing is

necessary at intervals in order to insure accuracy of results.

s WARNING: GRINDING GENERATES DUST.

Most of the dusts generated when grinding are from the material

being ground. Excessive dust inhalation may affect the breathing

function. To avoid breathing impairment always employ dust

controls and/or protective measures appropriate to the materials

being ground. See Federal Hazard Communication Standard

29CRF, 1910.1200.

12. After removing the dresser, set the work speed of the lathe

for approximately 50 RPM which is normal operating speed

and ideal for most grinding conditions. Although this speed

is suitable for many operations, the work RPM can be set to

meet any requirements. Advance grinder slowly until wheel

barely touches surface to be ground.

13. Upon wheel contact with the workpiece, increase the feed

on the lathe compound to .001” or any suitable in feed

selected and engage the traverse mechanism. When

grinding to very close tolerances, redress the wheel as

outlined above before making the final grind over the stock.

Allow the wheel to spark out on this final grind by taking

several passes back and forth over the piece, using the

hand wheel to traverse carriage.

s CAUTION: Never operate the grinder without wearing

proper safety glasses or goggles. (ANSI TYPE Z78.1

with side shields or an equivalent).

14. Occasionally, when grinding the full length of a piece

mounted between lathe centers, the grinder must be

positioned to allow pulley end to clear tail stock. To do this,

loosen mounting post screw, and turn wheel end in toward

workpiece sufficiently to clear tail stock with pulley. Lock

grinder in position and dress wheel face parallel with

workpiece.

STRAIGHT STRAIGHT

CUP OR

RECESSED

FLARING

CUP

FACE

GRINDING

GRINDING FACE

FACE GRINDING

The best method of face grinding is to rotate the Tool Post Grinder

so the spindle is 90° to the lathe center and move the wheel into

position using the compound. On many lathes, however,

compound travel is insufficient, and the following method is

suggested:

Set Up Instructions:

1. Clamp the diamond dresser onto the workpiece or a piece of

stock chucked in the lathe, with the diamond nib facing the

operator.

2. Remove the nib by loosening the locking set screw and

insert the diamond into the right side hole so that it extends

about 1/8” beyond the holder and faces the tailstock as

illustrated in Figure 12 on page 11.

3. Rotate the Tool Post Grinder sufficiently to allow the corner

of the wheel to traverse the full width of the face to be ground

using the compound travel. Bevel the corner of the wheels

as shown in Figure 13 on page 11.

NOTE: The grinding operation will determine the

amount of bevel required. A small beveled face will

break down faster that a wide face and consequently

will require redressing more often.

INTERNAL GRINDING

To grind internally, remove the wheel cover, grinding wheel,

collars, and grinding spindle, and insert an internal grinding

spindle, the selection of which is determined by the depth of the

hole to be ground. For more information on internal grinding see,

“Selecting the Proper Grinding Spindle.”

A wheel from 2/3 to 3/4 the diameter of the hole to be ground is

recommended. However NEVER exceed the maximum

recommended wheel size for the spindle as specified in the chart

on page 14. Check the speed chart on the grinder for the proper

pulley combination and assemble to the motor shaft and grinding

spindle.

s WARNING: ALWAYS POSITION THE WHEEL INSIDE THE

WORKPIECE BEFORE TURNING THE GRINDER ON.

DRESSING A WHEEL - INTERNAL GRINDING

Set Up Instructions:

1. To dress a wheel for internal grinding, clamp the diamond

dresser onto the workpiece or a piece of stocked chucked in

the lathe. The diamond will normally face away from the

operator toward the back of the lathe as illustrated in Figure

10 on page 10.

2. With the grinder running, make several very light passes

over the nib using the hand wheel to traverse. You now have

dressed the wheel so that the face nearest you will be

parallel to the work. Therefore, this face should contact the

workpiece when grinding internally as shown in Figure 11 on

page 11.

NOTE: The side on which the wheel is dressed is always

the contact face.

SELECTING THE PROPER WHEEL

Probably no other single factor is more important to achieving

good grinding results than the selection of a proper wheel. An

ideal wheel is one in which the bond wears away as fast as the

wheel grains are dulled. If the grains dull or wear down faster than

the bond, the wheel is too hard, and it will glaze. If the bond wears

away before the grain, the wheel is too soft, and it will load.

These conditions can be overcome to a certain extent by the

speed adjustment. If the wheel appears too hard, increase the

work speed. If the wheel appears too soft, increase the wheel

speed (within RPM specifications for the wheel). However, the

better solution to the problem is the selection of the proper wheel

for the job.

s IMPORTANT: NEVER INCREASE THE WHEEL SPEED OVER

THE MAXIMUM SAFE SPEED OF THE WHEEL.

The grain size and grit of the wheel generally determines the type

of finish to be obtained. A course wheel is desirable for rapid stock

removal. The grains deeply anchored in the bond allow greater

depth of cut. Also, the greater porosity of a coarse wheel assures

a cool cut. While an experienced operator can get a reasonably

fine finish with a coarse wheel, a fine finish is easier with a finer

grained wheel. On finishing grinds allow the wheel to cut freely

with a minimum feed. Heavy feed or pressure on finish grinds may

cause over heating and possibly work distortion.

s IMPORTANT: ALWAYS USE DUMORE BALANCED WHEELS

The selection of a balanced wheel is essential to precision

grinding. Balanced wheels facilitate grinding to precision

tolerances and in many instances prevent unnecessary service

costs. Always use Dumore wheels.

All grinding wheels are breakable; therefore care should be

exercised in handling and storage to prevent damage. Handle

wheels carefully to prevent dropping or bumping. Inorganic

bonded wheels, such as vitrified, silicate and magnesite are more

brittle than organic bonds (resinoid, shellac and rubber) and are

more readily broken by handling, shock or impact.

STORAGE

Wheels can be damaged by high humidity and/or freezing

temperatures and should be stored in areas not subject to

extremes of temperature and humidity. Storage should provide

protection against damage.

When selecting a toolpost grinder which uses interchangeable

spindles, care should be taken to choose the spindle which most

closely fits the user’s application. The spindle selected will

determine the grinding wheel size and RPM which can safely be

used (refer to the chart). The first step in selecting a spindle is to

identify those available for each grinder series. The following

chart provides information on all the currently available spindles

for the Series 57. For OD/external grinding choose an external

spindle or the insert spindle with the appropriate inserts. For

ID/internal grinding choose an internal spindle or the insert

spindle with the appropriate inserts.

For internal grinding, choose the spindle that provides the most

rigid set-up. This means that whenever possible a three bearing

spindle should be used to eliminate vibration and chatter. Also

when possible, use the shortest spindle or spindle insert that will

grind the hole. When internal grinding the wheel selected should

be about 2/3 the diameter of the hole to be ground. Knowing this,

remember that the spindle selected will determine which

diameter wheels are available for that spindle.

If your grinding applications require versatility, the 802-0024

insert spindle should be considered. With the spindle the user

can purchase spindle inserts which allow for external grinding.

Refer now to the listing of spindle inserts on the following page.

The 423-0004 insert allows the user to do external grinding.

Using the 423-0015 collet type insert with the 802-0024 allows

the user to employ mounted wheels with a 1/8” or 1/4” shank for

small internal grinding applications. Refer to the appropriate

columns for each spindle or insert for

• minimum internal grinding diameter

• maximum internal grinding depth

• maximum grinding wheel size and RPM

• appropriate wheel bore size

Also note that a selection of general purpose grinding wheels

come with each spindle and spindle insert.

SELECTING THE PROPER SPINDLE

MAX INTERNAL

GRINDING DEPTH

MAXI- MIN. HOLES HOLES

MUM MAXI- INT. SMALLER LARGER WEIGHTS

RECOM- MUM GRIND THAN THAN

CATALOG WHEEL MENDED WHEEL -ING QUILL QUILL EQUIPMENT NET SHIP

NUMBER A B C D E F G H J X BORE SPEED SIZE DM DM DM INCLUDED LBS. LBS.

EXTERNAL SPINDLES

1 WHEEL COLLAR, 3 GENERAL

805-0064 12.80 9.61 3.18 1.750 — 1-w-20RH 1-w-20RH — 1.75 — .500 15000 6X1 — — — PURPOSE WHEELS-774-0103 6.25 10

774-0019, 774-0126

805-0066 12.80 9.71 3.53 1.750 — 1-w-20RH 1-w-20RH — — — 1.250 15,000 — — — — 2 BALANCED 7 10

+WHEEL BORE 11-r 5” WHEEL COLLARS

INSERT SPINDLE

802-0024 11.00 9.57 — 1.750 — 1-w-20RH — — — — SEE SPINDLE INSERTS 4.5 6.5

INSERTS FOR INSERT SPINDLE

2 WHEEL COLLARS, 3 GENERAL

423-0006 — — 5.46 — 2.15 — .368 .605 — 1-r-28RH .250 32500 1 1-w X 5-i .56 2.25 — PURPOSE WHEELS-774-0010 .25 .5

(ID) 774-0119, 774-0029

2WHEEL COLLARS

423-0008 — — 6.66 — 3.41 — .250 .605 — 5-40RH .125 25000 1 X 1-i .56 3.56 — 2 GENERAL PURPOSE WHEELS .25 .5

(ID) 774-0005, 774-0018

423-0010 — — 7.71 — 4.46 — .250 .605 — 5-40RH .125 15000 1 X 1-i .56 4.56 — .25 .5

(ID)

2 WHEEL COLLARS

423-0012 — — 8.71 — 5.46 — .250 .605 — 5-40RH .125 15000 1 X 1-i .56 5.56 — 2 GENERAL PURPOSE WHEELS .25 .5

(ID) 774-0005, 774-0018

423-0013 — — 9.71 — 6.46 — .250 .605 — 5-40RH .125 15000 1 X 1-i .56 6.56 — .25 .5

(ID)

1 EACH 1-i” AND 1-r”

423-0015 — — 4.64 — 1.48 — — .680 — — 1-i & 1-r 42500 3-r .12 — — PRECISION COLLETS .25 .5

(MOUNTED WHEELS) SHANKS 4 ASSORTED MNTD WHEELS

2 WHEEL COLLARS, 3 GENERAL

423-0004 — — 3.87 — .52 — 3-i - 24RH .375 — — .375 15000 5 X 3-i — — — PURPOSE WHEELS - 774-0078 2 2.5

(OD) 774-0098, 774-0110

3-BEARING INTERNAL SPINDLE

2 WHEEL COLLARS

794-0058 20.82 9.45 12.97 1.750 9.44 1-w-20RH 3-i - 24RH 1.50 1.01 — .375 15000 2 1-w X 3-i 1.62 9 12.0 2 GENERAL PURPOSE WHEELS 10 12.5

774-0053, 774-0065

2 WHEEL COLLARS

794-0059 26.82 9.45 18.97 1.750 15.19 1-w-20RH 3-i - 24RH 1.50 1.01 — .375 15000 2 1-w X 3-i 1.62 15 18.0 2 GENERAL PURPOSE WHEELS 12 16

774-0053, 774-0065

}

EXTERNAL

INSERT SPINDLE ID INSERT

3-BEARING

INTERNAL

COLLET TYPE

MOUNTED

WHEEL

INSERT

OD INSERT

7 INTERCHANGEABLE SPINDLE INSERTS

(Must be used with 802-0024 Insert Spindle)

MOUNTED - WHEEL TYPE INSERT SPINDLE

Part No. 423-0015

Part No. 423-0008

Maximum recommended speed: 42,500 RPM

Complete with chuck, one each 1/8” and 1/4” precision collet

and our assorted mounted wheels. For internal grinding small

holes with mounted wheels.

Maximum recommended speed: 25,000 RPM

Complete with two balanced wheel collars and three general

purpose balanced wheels. For internal grinding down to 5/8”

diameter and 3” deep.

EXTERNAL TYPE INSERT SPINDLE

Part No. 423-0004

Maximum recommended speed: 15,000 RPM

Complete with two balanced wheel collars and three general

purpose balanced wheels. For external grinding with wheels up

to 5” in diameter.

INTERNAL TYPE INSERT SPINDLE

Part No. 423-0006

Maximum recommended speed: 32,500 RPM

Complete with two balanced wheel collars and general purpose

wheels. For internal grinding down to 5/8” diameter and 1-5/8”

deep.

Part No. 423-0010

Maximum recommended speed: 15,000 RPM

Complete with two balanced wheel collars and three general

purpose balanced wheels. For internal grinding down to 5/8”

diameter and 4” deep.

Part No. 423-0012

Maximum recommended speed: 15,000 RPM

Complete with two balanced wheel collars and three general

purpose balanced wheels. For internal grinding down to 5/8”

diameter and 5” deep.

Part No. 423-0013

Maximum recommended speed: 15,000 RPM

Complete with two balanced wheel collars and three general

purpose balanced wheels. For internal grinding down to 5/8”

diameter and 6” deep.

Wheels can be damaged by high humidity and/or freezing temperatures and should be stored in areas not subject to extremes of

temperature and humidity. Storage should provide protection against damage.

Dumore wheels are available in six types for grinding the

various types of materials encountered in the majority of

grinding applications. Wheels are aluminum oxide except those

with the symbol * preceding the catalog number which are

silicon carbide. Dimensions of Dumore wheels appear after the

wheels code number in the following order: wheel diameter,

wheel thickness, and hole diameter. For example “774-0008, 60

(1) 3-r x 1-r x .125 is a general-purpose wheel with a diameter of

3-r”, thickness of 1-r” and hole diameter of .125”. Where wheel is

recessed, diameter of recess is given first by the depth of the

recess.

EXPLANATION OF THE CODE IS AS FOLLOWS:

1. General-purpose wheel, for steels of hardness up to

Rockwell C-45.

2. For cast iron, brass and other non-ferrous metals.

3. For stainless steels and steels of Rockwell C-45 to C-60

and all stainless steel based plasma spray coatings.

4. For steels of Rockwell C-60 and higher.

5. For hard and soft rubber rolls.

6. For Grinding Carbide

GRINDING WHEELS

Part No. Code Description Grit Color

UNDER ONE INCH DIAMETER

774-0189 3 1-w x 1-r x .125 60 OW

recessed 1-r x 1-i

774-0005 1 5-i x 1-r x .125 60 GY

recessed 1-r x 1-i

774-0194 4 5-i x 1-r x .125 90 WH

recessed 1-r x 1-i

774-0008 1 3-r x 1-r x .125 60 GY

recessed 1-r x 1-i

774-0010 1 3-r x 1-w x .250 46 GY

774-0190 3 3-r x 3-r x .250 60 OW

*774-0013 2 7-i x 1-r x .125 46 BU

recessed 1-r x 1-i

774-0014 3 7-i x 1-r x .250 60 WH

recessed 1-r x 1-i

ONE INCH DIAMETER

774-0018 1 1 x 1-r x .125 60 GY

recessed 1-r x 1-i

774-0019 1 1 x 1-r x .250 46 GY

774-0191 3 1 x 1-r x .250 60 OW

774-0195 4 1 x 1-r x .250 90 WH

774-0021 1 1 x 1 x .250 46 GY

recessed 1-w x 3-i

BETWEEN ONE AND TWO INCH DIAMETER

774-0023 1&3 1-1-r x 1-r x .250 54 WH

774-0024 1 1-1-r x 1-r x .250 46 GY

774-0029 1 1-1-w x 1-r x .250 46 GY

774-0196 4 1-1-w x 1-r x .250 80 WH

Part No. Code Description Grit Color

BETWEEN ONE AND TWO DIAMETER (Continued)

774-0180 1&3 1-1-w x 3-i x .375 46 WH

774-0031 1 1-1-w x 1-w x .25 46 GY

recessed 5-i x 1-r

774-0033 3 1-1-w x 1-w x .250 60 WH

recessed 5-i x 1-r

774-0197 4 1-1-w x 1-w x .250 80 WH

recessed 5-i x 1-r

774-0034 1 1-1-w x 1 x .250 46 GY

recessed 5-i x 3-i

TWO INCH DIAMETER

774-0040 1 2 x 1-r x .250 54 GY

774-0041 1 2 x 1-r x .250 80 RD

*774-0042 2 2 x 1-r x .250 46 BU

774-0043 3 2 x 1-r x .250 60 WH

774-0198 4 2 x 1-r x .250 80 OW

774-0045 1&3 2 x 3-i x .250 54 GY

774-0167 2 x 3-i x .250 80 WH/RD

(Combination Wheel)

*774-0046 1 2 x 3-i x .375 46 BK

774-0047 1 2 x 3-i x .375 46 BU

774-0049 3 2 1-w x .375 46 WH

774-0050 1 2 x 1-w x .375 54 GY

*774-0051 2 2 x 1-w x .375 46 BU

774-0052 3 2 x 1-w x .375 46 WH

774-0053 1 2 x 1 x .375 46 GY

recessed 1-1-r x 1-w

TWO AND ONE-HALF DIAMETER

774-0061 1 2-1-w x 1-r x .250 46 GY

Part No. Code Description Grit Color

TWO AND ONE-HALF DIAMETER (Continued)

774-0065 1 2-1-w x 3-i x .375 46 BU

774-0192 3 2-1-w x 3-i x .375 60 OW

774-0199 4 2-1-w x 3-i x .375 80 OW

774-0066 1 2-1-w x 1-w x .500 46 GY

774-0193 3 2-1-w x 1-w x .500 60 OW

774-0068 1 2-1-w x 1 x .375 46 GY

recessed 1-3-r x 1-w

THREE INCH DIAMETER

774-0073 1 3 x 3-i x .375 46 BU

*774-0074 2 3 x 3-i x .375 46 BU

774-0075 3 3 x 3-i x .375 46 WH

774-0200 4 3 x 3-i x .375 80 OW

*774-0217 5 3 x 3-i x .375 36 BK

774-0080 3 3 x 1-w x .375 46 WH

774-0213 1 3 x 1-w x .500 46 BU

774-0083 1 3 x 3-r x .500 46 BU

774-0086 1 3 x 1 x .375 46 GY

recessed 2 x 1-w

774-0078 1 3 x 1-w x .375 46 BU

Part No. Code Description Grit Color

FOUR INCH DIAMETER

774-0201 4 4 x 3-i x .375 80 OW

774-0098 1 4 x 1-w x .375 46 GY

774-0100 3 4 x 1-w x .375 46 WH

774-0103 1 4 x 1-w x .500 46 GY

774-0105 3 4 x 1-w x .500 46 WH

774-0202 4 4 x 1-w x .500 80 OW

FIVE INCH DIAMETER

774-0110 1 5 x 3-i x .375 46 GY

774-0111 1 5 x 1-w x .375 46 BU

774-0113 3 5 x 1-w x .375 60 WH

774-0203 4 5 x 1-w x .375 80 OW

774-0117 1 5 x 1-w x .500 46 BU

*774-0118 2 5 x 1-w x .500 46 BU

774-0119 3 5 x 1-w x .500 60 WH

774-0122 1 5 x 3-r x .500 46 BU

774-0204 4 5 x 1-w x .500 80 OW

SIX INCH DIAMETER

774-0126 1 6 x 1-w x .500 46 BU

774-0127 2 6 x 1-w x .500 46 BU

774-0128 3 6 x 1-w x .500 60 WH

774-0205 4 6 x 1-w x .500 90 OW

*774-0216 5 6 x 1-w x .500 36 BK

* Due to the bonding agent, these wheels cannot be ring tested and must be vibration tested only.

VIBRATION TEST

The vibration test is based on the way that loose sand or similar material is distributed on the side of a wheel when the wheel is

vibrating.

To perform the vibration test, an abrasive wheel is set on a test fixture in the horizontal position and coated with a thin layer of fine,

dry sand. The wheel is vibrated gently. As the wheel vibrates, the sand granules respond to the vibration energy. If the wheel is

cracked, the granules move away from the crack, if the wheel is sound the granules will continue to be uniformly distributed over the

entire surface of the wheel.

s IMPORTANT: THIS TEST SHOULD INCLUDE AN OBSERVATION ON BOTH SIDES OF THE WHEEL.

COLOR CODE CHART

BU......................................Blue

BK ......................................Black

GY .....................................Gray

GR .....................................Green

OW ....................................Off White

RD .....................................Red

WH.....................................White

Pulley On

Motor

PULLEY AND BELT COMBINATION CHARTS

MODEL 8479 (57-042)

26”

22”

26”

19”

Belt

Length

Max.

Wheel

Idling

Spindle

Speed

Pulley On

Spindle

Belt

Number

3/4”

1”

1-1/2”

2”

3”

4”

5”

6”

32,600

22,650

14,000

10,750

7,150

5,500

4,625

3,600

Spindle

No. 0.75

No. 1

No. 2

No. 0.75

No. 1

No. 5

No. 4

No. 3

No. 4

No. 3

No. 1

429-0088

429-0086

429-0088

429-0085

Pulley On

Motor

MODEL 8584-210 (57-031)

22”

19”

22”

19”

22”

Belt

Length

Max.

Wheel

Idling

Spindle

Speed

Pulley On

Spindle

Belt

Number

1/2”

3/4”

1”

1-1/2”

2”

3”

4”

5”

6”

42,600

27,900

23,400

12,250

10,600

7,000

5,375

4,150

3,200

No. 1.2

No. 1

No. 2

No. 1.2

No. 3

No. 4

No. 2

No. 3

No. 1

No. 2

No. 1.2

No. 1

No. 0.75

No.0 .75

429-0086

429-0085

429-0086

429-0085

429-0086

LUBRICATION

The motor requires no lubrication, since it is equipped with

grease-sealed bearing.

GRINDING SPINDLES

Dumore grinding spindles are equipped with ball bearings

packed with grease, and require no lubrication. They can be

operated in any position.

All Dumore precision grinding spindles are quipped with water

and dust throwers. When used for wet grinding start the spindle

rotating before coolant is turned on; and turn coolant off before

stopping the spindle.

s IMPORTANT: Never allow coolant to flow on grinding

spindle when it is not rotating.

BRUSHES

Brush life varies according to the severity and continuity of

service. Inspect brushes periodically and wipe clean before

returning them to their respective brush holders. Each brush

should be returned to its exact position as before removal to

prevent changes in the brush seating. Brushes should be

replaced when worn to 1/4 inch length.

NOTE: Brushes should be replaced in pairs; however

Dumore only sells them individually.

FILTER MAINTENANCE

Model 8584-210, 8587-210, 8588-210 Motor Assemblies are

equipped with an air filter on the brush end allowing it to be

operated in a more contaminated environment. Periodically

inspect the felt filter. Clean or replace as required.

COMMUTATOR

Occasionally inspect the commutator for excessive wear or

grooving. If service is required, return grinder to an authorized

Dumore Service Station or directly to Dumore Corporation. The

grinder will be serviced with original parts and methods.

MAINTENANCE INSTRUCTIONS

The Dumore Grinder is a precision tool and should be properly cared for to assure finest grinding results and long, trouble-free service.

Pulley On

Motor

MODEL 8587-210 (57-021)

22”

19”

22”

19”

22”

19”

22”

Belt

Length

Max.

Wheel

Idling

Spindle

Speed

Pulley On

Spindle

Belt

Number

1/2”

3/4”

1”

1-1/2”

2”

3”

4”

5”

6”

45,000

30,000

22,500

15,000

10,000

7,500

5,625

4,500

3,750

No. 1

No. 2

No. 1

No. 3

No. 2

No. 4

No. 3

No. 2

No. 3

No. 1

No. 2

No. 1

No. 0.75

No. 1.2

No. 1

429-0086

429-0085

429-0086

429-0085

429-0086

429-0085

429-0086

Pulley On

Motor

MODEL 8588-210 (57-041)

22”

19”

22”

26”

22”

Belt

Length

Max.

Wheel

Idling

Spindle

Speed

Pulley On

Spindle

Belt

Number

1/2”

3/4”

1”

1-1/2”

2”

3”

4”

5”

6”

47,500

30,400

22,800

14,250

9,500

7,125

5,700

4,560

3,560

No. 1.2

No. 0.75

No. 1

No. 2

No. 4

No. 5

No. 4

No. 3

No. 1.2

No. 0.75

No. 1

No. 0.75

No. 1.2

No. 0.75

429-0086

429-0085

429-0086

429-0088

429-0086

SERIES 57

MODELS: 8587-210 8588-210

8584-210 8479

Note: Motor for Models 8584-210, 8587-210, 8588-210

INSTRUCTIONS FOR ORDERING PARTS

All parts listed herein may be ordered from your Dumore Distributor or from any authorized Dumore Service Station. Only Dumore

replacement parts are authorized in Dumore products. Filing this list for future reference will assure your obtaining proper parts for service.

When ordering parts, always give the following information:

• The part number in this list

• The part name in this list

• The catalog and serial number

ITEM PART MODEL

NO. NUMBER DESCRIPTION REQ. NO.

. . . . . . . . . . . . . 858-0040. . . . . . . Motor assembly, 115 Volts, Universal 1/2 HP . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

(Includes Items 1 thru 31 and 53 thru 56 and 77 thru 80)

. . . . . . . . . . . . . 858-0042. . . . . . . Motor assembly, 115 Volts, Universal 3/4 HP . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

(Includes Items 1 thru 31 and 53 thru 56 and 77 thru 80)

. . . . . . . . . . . . . 858-0046. . . . . . . Motor assembly, 115 Volts, Universal 1 HP . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

(Includes Items 1 thru 31 and 53 thru 56 and 77 thru 80)

. . . . . . . . . *430-0341-217. . . . . . . Motor Assembly, 220/440 Volts, Induction, 1 HP . . . . . . . . . . . . . . . . . . . 1 . . . . . 8479 . . . . . . . . . .

3 Phase (Includes Items 1, 2, 6 and 11)

1 . . . . . . . . . . . . 571-0129 . . . . . . . Switch Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . ALL . . . . . . . . . .

2 . . . . . . . . . . . R769-0015. . . . . . . Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . . ALL . . . . . . . . . .

3 . . . . . . . . . . . R658-0073. . . . . . . Switch Indicator Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

4 . . . . . . . . . . . R751-0097. . . . . . . Toggle Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

5 . . . . . . . . . . . . 627-0299 . . . . . . . Lead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

6 . . . . . . . . . . . . 645-0339 . . . . . . . Nut, 1/2-20 L.H. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . ALL . . . . . . . . . .

7 . . . . . . . . . . . R686-0023. . . . . . . Ring, Strain Relief. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

8 . . . . . . . . . . . . 426-0307 . . . . . . . Ball Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8588 . . . . . . . . . .

9 . . . . . . . . . . . . 589-0632 . . . . . . . Brush End Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

10 . . . . . . . . . . . 643-2022 . . . . . . . Speed Chart/Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

643-2017. . . . . . . Speed Chart/Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

643-2021. . . . . . . Speed Chart/Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

11. . . . . . . . . . . . 853-0074 . . . . . . . Caution Decal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . ALL . . . . . . . . . .

12 . . . . . . . . . **R456-0060. . . . . . . Brush Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8588 . . . . . . . . . .

13 . . . . . . . . . **R457-0622. . . . . . . Carbon Brush Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8588 . . . . . . . . . .

14 . . . . . . . . . . **451-0056. . . . . . . Brush Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

15 . . . . . . . . . . R766-0356. . . . . . . Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . 8588 . . . . . . . . . .

16 . . . . . . . . . . R821-0309. . . . . . . Ground Screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

17 . . . . . . . . . . R769-0003. . . . . . . Lock Washer, Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8587 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8584 . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . 8588 . . . . . . . . . .

This manual suits for next models

Table of contents

Other dumore Grinder manuals