Jet JPSG-618M1 Service manual

Operating Instructions and Parts Manual
6”x18” Precision Manual Surface Grinder
Model JPSG-618M1
WMH TOOL GROUP
2420 Vantage Drive
Elgin, Illinois 60123 Part No. M-414519
Ph.: 800-274-6848 Revision A 4/05
www.wmhtoolgroup.com Copyright © WMH Tool Group

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This manual has been prepared for the owner and operators of a JET JPSG-618M1 Surface Grinder. Its
purpose, aside from machine operation, is to promote safety using accepted operating and maintenance
procedures. To obtain maximum life and efficiency from your Surface Grinder and to aid in using it safely,
please read this manual thoroughly and follow the instructions carefully.
Warranty and Service
WMH Tool Group warrants every product it sells. If one of our tools needs service or repair, one of our
Authorized Repair Stations located throughout the United States can provide quick service or information.
In most cases, a WMH Tool Group Repair Station can assist in authorizing repair work, obtaining parts, or
perform routine or major maintenance repair on your JET product.
For the name of an Authorized Repair Station in your area, please call 1-800-274-6848, or visit our web
site at www.wmhtoolgroup.com
More Information
Remember, WMH Tool Group is consistently adding new products to the line. For complete, up-to-date
product information, check with your local WMH Tool Group distributor, or visit our web site at
www.wmhtoolgroup.com
WMH Tool Group Warranty
WMH Tool Group makes every effort to assure that its products meet high quality and durability standards
and warrants to the original retail consumer/purchaser of our products that each product be free from
defects in materials and workmanship as follows: 1 YEAR LIMITED WARRANTY ON ALL PRODUCTS
UNLESS SPECIFIED OTHERWISE. This Warranty does not apply to defects due directly or indirectly to
misuse, abuse, negligence or accidents, normal wear-and-tear, repair or alterations outside our facilities,
or to a lack of maintenance.
WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD SPECIFIED ABOVE,
BEGINNING FROM THE DATE THE PRODUCT WAS PURCHASED AT RETAIL. EXCEPT AS STATED
HEREIN, ANY IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS ARE EXCLUDED.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED WARRANTY LASTS,
SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. IN NO EVENT SHALL WMH TOOL GROUP
BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR INCIDENTAL,
CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR
PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY
TO YOU.
To take advantage of this warranty, the product or part must be returned for examination, postage
prepaid, to an Authorized Repair Station designated by our office. Proof of purchase date and an
explanation of the complaint must accompany the merchandise. If our inspection discloses a defect, we
will either repair or replace the product at our discretion, or refund the purchase price if we cannot readily
and quickly provide a repair or replacement. We will return the repaired product or replacement at WMH
Tool Group’s expense, but if it is determined there is no defect, or that the defect resulted from causes
not within the scope of WMH Tool Group’s warranty, then the user must bear the cost of storing and
returning the product. This warranty gives you specific legal rights; you may also have other rights, which
vary from state to state.
WMH Tool Group sells through distributors only. Members of the WMH Tool Group reserve the right to
effect at any time, without prior notice, alterations to parts, fittings and accessory equipment, which they
may deem necessary for any reason whatsoever.

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Table of Contents
Warranty and Service ..............................................................................................................................2
Table of Contents....................................................................................................................................3
Warning...................................................................................................................................................4
Introduction..............................................................................................................................................6
Specifications ..........................................................................................................................................6
Features of the JPSG-618M1...................................................................................................................7
Unpacking ...............................................................................................................................................9
Contents of the Shipping Container......................................................................................................9
Installation and Assembly ......................................................................................................................10
Installing Table...................................................................................................................................11
Leveling the Machine .........................................................................................................................11
Installing Splash Guard......................................................................................................................12
Installing Coolant System...................................................................................................................12
Installing Grinding Wheel....................................................................................................................12
Removing Wheel Assembly................................................................................................................13
Wheel Dressing..................................................................................................................................13
Wheel Balancing................................................................................................................................14
Grounding Instructions...........................................................................................................................14
Extension cords..................................................................................................................................15
230 Volt, Three Phase Operation........................................................................................................15
Converting from 230 Volt to 460 Volt..................................................................................................15
Adjustments...........................................................................................................................................16
Timing Belt.........................................................................................................................................16
Operating Controls.................................................................................................................................16
Operation...............................................................................................................................................16
Longitudinal Movement of Table.........................................................................................................16
Crossfeed Movement of Table............................................................................................................16
Coolant System..................................................................................................................................17
Auto Lubrication System.....................................................................................................................17
Grinding Wheel Selection Chart.............................................................................................................18
Troubleshooting.....................................................................................................................................19
Replacement Parts................................................................................................................................19
Parts List: Spindle Assembly..............................................................................................................20
Spindle Assembly...............................................................................................................................21
Parts List: Column Assembly..............................................................................................................22
Column Assembly..............................................................................................................................26
Parts List: Saddle and Base Assembly ...............................................................................................22
Saddle and Base Assembly................................................................................................................23
Parts List: Table Assembly.................................................................................................................27
Table Assembly..................................................................................................................................29
Parts List: Base Assembly..................................................................................................................30
Base Assembly..................................................................................................................................31
Parts List: Guard and Electrical Assembly ..........................................................................................32
Guard and Electrical Assembly...........................................................................................................33
Parts List: Coolant System .................................................................................................................34
Coolant System..................................................................................................................................35
Parts List: Electrical Panel..................................................................................................................36
Electrical Panel ..................................................................................................................................37
Electrical Connections ...........................................................................................................................38

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Warning
1. Read and understand the entire owners manual before attempting assembly or operation.
2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with
all of these warnings may cause serious injury.
3. Replace the warning labels if they become obscured or removed.
4. This surface grinder is designed and intended for use by properly trained and experienced personnel
only. If you are not familiar with the proper and safe operation of a surface grinder, do not use until
proper training and knowledge have been obtained.
5. Do not use this surface grinder for other than its intended use. If used for other purposes, WMH Tool
Group disclaims any real or implied warranty and holds itself harmless from any injury that may result
from that use.
6. Always wear approved safety glasses/face shields while using this machine. Everyday eyeglasses
only have impact resistant lenses; they are not safety glasses.
7. Before operating the surface grinder, remove tie, rings, watches and other jewelry, and roll sleeves up
past the elbows. Remove all loose clothing and confine long hair. Non-slip footwear or anti-skid floor
strips are recommended. Do not wear gloves.
8. Wear ear protectors (plugs or muffs) during extended periods of operation.
9. Some dust created by power sanding, sawing, grinding, drilling and other construction activities
contain chemicals known to cause cancer, birth defects or other reproductive harm. Some examples
of these chemicals are:
• Lead from lead based paint.
• Crystalline silica from bricks, cement and other masonry products.
• Arsenic and chromium from chemically treated lumber.
Your risk of exposure varies, depending on how often you do this type of work. To reduce your
exposure to these chemicals, work in a well-ventilated area and work with approved safety
equipment, such as face or dust masks that are specifically designed to filter out microscopic
particles.
10. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.
11. Make certain the switch is in the OFF position before connecting the machine to the power supply.
12. Make certain the machine is properly grounded.
13. Make all machine adjustments or maintenance with the machine unplugged from the power source.
14. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting
wrenches are removed from the machine before turning it on.
15. Keep safety guards in place at all times when the machine is in use. If removed for maintenance
purposes, use extreme caution and replace the guards immediately.
16. Check damaged parts. Before further use of the machine, a guard or other part that is damaged
should be carefully checked to determine that it will operate properly and perform its intended
function. Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting
and any other conditions that may affect its operation. A guard or other part that is damaged should
be properly repaired or replaced.
17. Provide for adequate space surrounding work area and non-glare, overhead lighting.
18. Keep the floor around the machine clean and free of scrap material, oil and grease.
19. Keep visitors a safe distance from the work area. Keep children away.

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20. Make your workshop child proof with padlocks, master switches or by removing starter keys.
21. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
22. Maintain a balanced stance at all times so that you do not fall or lean against the grinding wheel or
other moving parts. Do not overreach or use excessive force to perform any machine operation.
23. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for
which it was not designed. The right tool will do the job better and safer.
24. Use recommended accessories; improper accessories may be hazardous.
25. Make sure the work piece is secured before grinding operations.
26. Turn off the machine before cleaning. Use a brush or compressed air to remove chips or debris — do
not use your hands.
27. Do not stand on the machine. Serious injury could occur if the machine tips over.
28. Never leave the machine running unattended. Turn the power off and do not leave the machine until it
comes to a complete stop.
29. Remove loose items and unnecessary work pieces from the area before starting the machine.
Familiarize yourself with the following safety notices used in this manual:
This means that if precautions are not heeded, it may result in minor injury and/or
possible machine damage.
This means that if precautions are not heeded, it may result in serious injury or possibly
even death.
- - SAVE THESE INSTRUCTIONS - -

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Introduction
This manual is provided by WMH Tool Group covering the safe operation and maintenance procedures
for a JET Model JPSG-618M1 Surface Grinder. This manual contains instructions on installation, safety
precautions, general operating procedures, maintenance instructions and parts breakdown. This machine
has been designed and constructed to provide years of trouble free operation if used in accordance with
instructions set forth in this manual. If there are any questions or comments, please contact either your
local supplier or WMH Tool Group. WMH Tool Group can also be reached at our web site:
www.wmhtoolgroup.com.
Specifications
Model Number......................................................................................................................JPSG-618M1
Stock Number................................................................................................................................ 414519
Table Size (L x W)(in.)..................................................................................................................... 6 x 18
Grinding Capacity (L x W)(in.)............................................................................................................9 x 7
T-Slot (in.)...........................................................................................................................................9/16
Maximum Longtitudinal Manual Table Travel (in.)...................................................................................20
Maximum Cross Manual Table Travel (in.).........................................................................................7-3/4
Cross Handwheel Graduation (in.) .................................................................................................. 0.0005
Cross per Handwheel Revolution (in.)...................................................................................................0.2
Maximum Spindle Centerline to Table (in.).............................................................................................18
Vertical Handwheel Graduation (in.)................................................................................................0.0001
Vertical per Handwheel Revolution (in.)...............................................................................................0.05
Maximum Wheel Diameter (in.)................................................................................................................8
Maximum Wheel Thickness (in.) ...........................................................................................................3/4
Wheel Center Bore (in.).....................................................................................................................1 1/4
Spindle Speed (RPM).......................................................................................................................3,450
Main Motor (TEFC)......................................................................2 HP, 3 Ph, 230V/460V Prewired 230V
Floor Space Required (L x W x H)(in.).....................................................................................74 x 45 x 68
Net Weight (lbs.)...............................................................................................................................1,585
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, WMH Tool Group reserves the right to change specifications at any time and
without prior notice, without incurring obligations.

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Features of the JPSG-618M1

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Dimensions and Layout

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Unpacking
Open shipping container and check for shipping
damage. Report any damage immediately to
your distributor and shipping agent. Do not
discard any shipping material until the Surface
Grinder is installed and running properly.
Compare the contents of your container with the
following parts list to make sure all parts are
intact. Missing parts, if any, should be reported
to your distributor. Read the instruction manual
thoroughly for assembly, maintenance and
safety instructions.
Contents of the Shipping Container
1 Surface Grinder
1 Coolant Tank (with two hoses inside)
1 Balance Stand
1 Splash Guard (with 3 Sectional Pieces)
1 Table
2 Bearing Strips
1 Tool Box containing: [see photo below]
3 Leveling Blocks
3 Hex Cap Screws with Nuts
1 Hex Wrench Set (9 pcs.)
1 Adjustable Wrench
1 Cross Point Screwdriver
1 Flat Head Screwdriver
1 Dressing Diamond
1 Offset Diamond Holder
1 Can Touch-Up Paint
1 Balancing Arbor
1 Arbor Wrench
2 Square Head Bolts with Washers/Nuts
1 Wheel Extractor
1 Rubber Coupling (PN: SG1090)
1 Owner's Manual
1 Warranty Card
Read and understand the entire contents of this manual before attempting set-up
or operation! Failure to comply may cause serious injury.

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Installation and Assembly
The Surface Grinder should
be disconnected from power during
assembly procedures.
Refer to parts breakdowns at the end of this
manual if clarification is needed for any
assembly procedure.
1. Remove the top and sides of the crate.
Leave the surface grinder bolted to the
pallet until it reaches the desired location.
2. Clean all rust protected surfaces with
kerosene or a light solvent. Do not use
gasoline, paint or lacquer thinner – these
will damage painted surfaces.
3. Cover all machined surfaces with a film of
light machine oil to inhibit rust.
4. Remove all absorption bags and any other
packing material. Remove bolts and/or
shipping straps, and remove everything
from the pallet except the Surface Grinder.
5. Use nylon straps that are rated for the
proper weight of the machine to be lifted.
See specifications. Attach the straps to the
lifting bolts. See Figure 1.
Keep people a safe distance
away from the Surface Grinder while it is
being moved.
6. The Surface Grinder must be on a solid,
level surface. If the Surface Grinder is
located next to another machine or wall, you
must leave minimum clearance of 2 feet for
maintenance and operation. Also take into
consideration the size and location of the
Coolant Tank.
7. When the Surface Grinder is in place, the
lifting lugs can remain on the machine.
8. Thread the leveling screws into the base of
the machine. Place the leveling blocks
underneath the screws, and tighten the hex
nut. See Figure 2. NOTE: You will adjust
these to level the machine after the table
has been installed.
9. Raise the wheelhead and remove the block
of wood which was used for shipping.
10. Remove the table hold-downs and socket
head cap screws. These should be saved
for future use.
11. Loosen the table lock (knurled knob) on the
right side of the table.
Figure 1
Figure 2