Jet BD-920W Service manual

Operating Instructions and Parts Manual
9 x 20-inch Belt Drive Bench Lathe
Model BD-920W
WALTER MEIER (Manufacturing) Inc.
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-321376
Ph.: 800-274-6848 Revision H 01/2013
www.waltermeier.com Copyright © 2013 Walter Meier (Manufacturing) Inc.

2
Warranty and Service
Walter Meier (Manufacturing) Inc., warrants every product it sells. If one of our tools needs service or repair, one of
our Authorized Service Centers located throughout the United States can give you quick service. In most cases, any
of these Walter Meier Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or
perform routine maintenance and major repair on your JET
® tools. For the name of an Authorized Service Center in
your area call 1-800-274-6848.
MORE INFORMATION
Walter Meier is consistently adding new products to the line. For complete, up-to-date product information, check with
your local Walter Meier distributor, or visit www.jettools.com.
WARRANTY
JET products carry a limited warranty which varies in duration based upon the product (MW = Metalworking, WW =
Woodworking).
WHAT IS COVERED?
This warranty covers any defects in workmanship or materials subject to the exceptions stated below. Cutting tools,
abrasives and other consumables are excluded from warranty coverage.
WHO IS COVERED?
This warranty covers only the initial purchaser of the product.
WHAT IS THE PERIOD OF COVERAGE?
The general JET warranty lasts for the time period specified in the product literature of each product.
WHAT IS NOT COVERED?
Five Year Warranties do not cover woodworking (WW) products used for commercial, industrial or educational
purposes. Woodworking products with Five Year Warranties that are used for commercial, industrial or education
purposes revert to a One Year Warranty. This warranty does not cover defects due directly or indirectly to misuse,
abuse, negligence or accidents, normal wear-and-tear, improper repair or alterations, or lack of maintenance.
HOW TO GET SERVICE
The product or part must be returned for examination, postage prepaid, to a location designated by us. For the name
of the location nearest you, please call 1-800-274-6848.
You must provide proof of initial purchase date and an explanation of the complaint must accompany the
merchandise. If our inspection discloses a defect, we will repair or replace the product, or refund the purchase price,
at our option. We will return the repaired product or replacement at our expense unless it is determined by us that
there is no defect, or that the defect resulted from causes not within the scope of our warranty in which case we will,
at your direction, dispose of or return the product. In the event you choose to have the product returned, you will be
responsible for the shipping and handling costs of the return.
HOW STATE LAW APPLIES
This warranty gives you specific legal rights; you may also have other rights which vary from state to state.
LIMITATIONS ON THIS WARRANTY
WALTER MEIER LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR
EACH PRODUCT. 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.
WALTER MEIER SHALL IN NO EVENT 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.
Walter Meier sells through distributors only. The specifications in Walter Meier catalogs are given as general
information and are not binding. Members of Walter Meier reserve the right to effect at any time, without prior notice,
those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason
whatsoever. JET
® branded products are not sold in Canada by Walter Meier.

3
Table of Contents
Warranty and Service............................................................................................................................................2
Table of Contents..................................................................................................................................................3
Introduction ...........................................................................................................................................................7
Specifications........................................................................................................................................................7
Unpacking .............................................................................................................................................................8
Contents of the Shipping Container......................................................................................................8
Set Up and Preparation for Operation...................................................................................................................9
General Description ..............................................................................................................................................9
Controls...............................................................................................................................................................12
Operation ............................................................................................................................................................13
Tool Set-Up........................................................................................................................................13
Manual Turning..................................................................................................................................13
Longitudinal Turning with Auto-Feed..................................................................................................13
Taper Turning Using Tailstock Off-Set................................................................................................14
Taper Turning by Setting the Top Slide ..............................................................................................14
Turning Between Centers...................................................................................................................14
Thread Cutting...................................................................................................................................15
Metric Thread Cutting.........................................................................................................................15
Lathe Accessories...............................................................................................................................................16
Adjustment and Replacement ...............................................................................................................................18
Adjustment of Main Spindle Bearings.................................................................................................18
Adjustment of Cross and Top Slide ....................................................................................................18
Adjustment of Compound Feed Screw and Float................................................................................19
Cross Slide Screw..............................................................................................................................19
Compound Slide Spindle Backlash Adjustment ..................................................................................19
Adjustment of Half-Nut guide..............................................................................................................20
Replacing the Shear Pin in the Leadscrew .........................................................................................20
Replacing the V-Belt ..........................................................................................................................20
Lubrication Schedule...........................................................................................................................................21
Replacement Parts..............................................................................................................................................22
Headstock Assembly – Exploded View...............................................................................................22
Headstock Assembly – Parts List.......................................................................................................23
Drive Assembly – Exploded View.......................................................................................................24
Drive Assembly – Parts List................................................................................................................25
Tension Roller Assembly – Exploded View & Parts List......................................................................26
Quadrant Assembly – Exploded View & Parts List..............................................................................27
Electrical Assembly – Exploded View.................................................................................................28
Electrical Assembly – Parts List..........................................................................................................29
Gear Box Assembly – Exploded View.................................................................................................30
Gear Box Assembly – Parts List.........................................................................................................31
Apron Assembly – Exploded View......................................................................................................32
Apron Assembly – Parts List ..............................................................................................................33
Apron Assembly (continued) – Exploded View...................................................................................34
Apron Assembly (continued) – Parts List............................................................................................35
Saddle and Cross Slide – Exploded View...........................................................................................36
Saddle and Cross Slide Assembly – Parts List ...................................................................................37
Top Slide Assembly – Exploded View................................................................................................38
Top Slide Assembly – Parts List.........................................................................................................39
Tailstock Assembly – Exploded View.................................................................................................40
Tailstock Assembly – Parts List..........................................................................................................41
Steady Rest Assembly – Exploded View & Parts List..........................................................................42
Travel Rest Assembly – Exploded View & Parts List...........................................................................43
Lathe Bed Assembly – Exploded View ..............................................................................................44
Lathe Bed Assembly – Parts List........................................................................................................45
Wiring Diagram ...................................................................................................................................................46

4
A. GROUNDING INSTRUCTIONS
1. All grounded, cord-connected tools:
In the event of a malfunction or breakdown, grounding provides a path of least resistance for 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.
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 service personnel if the grounding instructions are not completely
understood, or if in doubt as to whether the tool is properly grounded.
Use only 3-wire extension cords that have 3-prong grounding plugs and 3-pole receptacles that accept the
tool's plug.
Repair or replace damaged or worn cord immediately.
2. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating less
than 150 volts:
This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in Sketch A. The
tool has a grounding plug that looks like the plug illustrated in Sketch A. A temporary adapter, which looks like
the adapter illustrated in Sketches B and C, may be used to connect this plug to a 2-pole receptacle as shown
in Sketch B if a properly grounded outlet is not available. The temporary adapter should be used only until a
properly grounded outlet can be installed by a qualified electrician.(This adapter is not permitted in Canada)
The green-colored rigid ear, lug, and the like, extending from the adapter must be connected to a permanent
ground such as a properly grounded outlet box.
3. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating
between 150 - 250 volts, inclusive:
This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in Sketch D. The
tool has a grounding plug that looks like the plug illustrated in Sketch D. Make sure the tool is connected to an
outlet having the same configuration as the plug. No adapter is available or should be used with this tool. If the
tool must be reconnected for use on a different type of electric circuit, the reconnection should be made by
qualified service personnel; and after reconnection, the tool should comply with all local codes and ordinances.
4. Permanently connected tools:
This tool should be connected to a grounded metal permanent wiring system; or to a system having an
equipment-grounding conductor.

5
B. FOR ALL TOOLS AS APPLICABLE
1. 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.
2. Replace the warning labels if they become obscured or removed.
3. This lathe 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 lathe, do not use until proper training and knowledge
have been obtained.
4. Do not use this lathe for other than its intended use. If used for other purposes, Walter Meier
(Manufacturing) Inc., disclaims any real or implied warranty and holds itself harmless from any injury that
may result from that use.
5. KEEP GUARDS IN PLACE and in working order.
6. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and adjusting
wrenches are removed from tool before turning it on.
7. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.
8. DON'T USE IN DANGEROUS ENVIRONMENT. Don't use power tools in damp or wet locations, or expose
them to rain. Keep work area well lighted.
9. KEEP CHILDREN AWAY. All visitors should be kept safe distance from work area.
10. MAKE WORKSHOP KID PROOF with padlocks, master switches, or by removing starter keys.
11. DON'T FORCE TOOL. It will do the job better and safer at the rate for which it was designed.
12. USE RIGHT TOOL. Don't force tool or attachment to do a job for which it was not designed.
13. WEAR PROPER APPAREL. Do not wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry
which may get caught in moving parts. Nonslip footwear is recommended. Wear protective hair covering to
contain long hair.
14. ALWAYS USE SAFETY GLASSES. Also use face or dust mask if cutting operation is dusty. Everyday
eyeglasses only have impact resistant lenses, they are NOT safety glasses.
15. SECURE WORK. Use clamps or a vise to hold work when practical. It's safer than using your hand and it
frees both hands to operate tool.
16. DON'T OVERREACH. Keep proper footing and balance at all times.
17. MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for best and safest performance. Follow
instructions for lubricating and changing accessories.
18. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
19. DISCONNECT TOOLS before servicing; when changing accessories, such as blades, bits, cutters, and the
like.
20. REDUCE THE RISK OF UNINTENTIONAL STARTING. Make sure switch is in off position before plugging
in.

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21. USE RECOMMENDED ACCESSORIES. Consult the owner's manual for recommended accessories. The
use of improper accessories may cause risk of injury to persons.
22. NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is
unintentionally contacted.
23. CHECK DAMAGED PARTS. Before further use of the tool, 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.
24. DIRECTION OF FEED. Feed work into a blade or cutter against the direction of rotation of the blade or
cutter only.
25. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don't leave tool until it comes to a
complete stop.
26. Some dust created by power sanding, sawing, grinding, drilling and other construction activities contains
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 and cement and other masonry products, and
•Arsenic and chromium from chemically-treated lumber.
Your risk from those exposures 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 those dust masks that are specifically designed to filter out microscopic particles
27. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.
28. Tighten all locks before operating.
29. USE PROPER EXTENSION CORD. Make sure your extension cord is in good condition. When using an
extension cord, be sure to use one heavy enough to carry the current your product will draw. An
undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows
the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next
heavier gage. The smaller the gage number, the heavier the cord.
Volts
120V 25 ft. 50ft. 100ft. 150ft.
240V 50ft. 100ft. 200ft. 300ft.
Not
More More
Than Than
0 6 16 16 14
6 10 161412
10 12 16 14 12
12 16 12
AWG
Not Recommended
Only the applicable parts of the Table need to be included. For instance, a
120-volt product need not include the 240-volt heading
Total length of cord in feet
Ampere Rating
18
18
16
14
Table 1
Minimum Gage for Cord

7
Introduction
This manual is provided by Walter Meier (Manufacturing) Inc., covering the safe operation and maintenance
procedures for a JET Model BD-920W Bench Lathe. 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 Walter Meier. Walter Meier can also be reached at our web site: www.waltermeier.com.
Specifications
Model Number......................................................................................................................................... BD-920W
Stock Number .............................................................................................................................................321376
Capacities:
Swing Over Bed ...............................................................................................................................................9”
Swing Over Cross Slide ...........................................................................................................................5-5/16”
Distance Between Centers.............................................................................................................................20”
Headstock:
Hole Through Spindle ...................................................................................................................................7/8”
Spindle Nose.................................................................................................................................. 1/2” x 8 T.P.I
Taper in Spindle..........................................................................................................................................MT-3
Spindle Bearing Type.................................................................................................................. Tapered Roller
Number of Spindle Speeds ...............................................................................................................................6
Range of Spindle Speeds ...........................................................................................................130-2000 RPM
Gear Box:
Number of Longitudinal Feeds........................................................................................................................60
Range of Longitudinal Feeds ....................................................................................................0.0006” – 0.037”
Number of Inch Threads .................................................................................................................................30
Range of Inch Threads.......................................................................................................................8-60 T.P.I.
Number of Metric Threads ..............................................................................................................................18
Range of Metric Threads.......................................................................................................................0.4 – 3.5
Compound and Carriage:
Toolpost Type .........................................................................................................................single and 4-Way
Maximum Tool Size.............................................................................................................................1/2” x 1/2”
Maximum Compound Slide Travel.............................................................................................................1-7/8”
Maximum Cross Slide Travel ...........................................................................................................................5”
Maximum Carriage Travel..............................................................................................................................16”
Tailstock:
Tailstock Spindle Travel...........................................................................................................................1-9/16”
Diameter of Tailstock Spindle ..................................................................................................................1-1/16”
Taper in Tailstock Spindle...........................................................................................................................MT-2
Miscellaneous:
Steady Rest Capacity...................................................................................................................... 1/4” – 1-7/8”
Follow Rest Capacity ...................................................................................................................... 1/4” – 1-1/8”
Length of Bed.................................................................................................................................................32”
Width of Bed...............................................................................................................................................4-1/2”
Height of Bed .............................................................................................................................................6-5/8”
Overall Dimensions..............................................................................................................40”L x 21”W x 20”H
Main Motor .......................................................................................................TEFC, 3/4HP, 1PH, 115V, 60Hz
Noise emission (idle)..................................................................................................................................75 dB
Net Weight (approx.).............................................................................................................................. 254 lbs.
Shipping Weight (approx.)...................................................................................................................... 300 lbs.
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, Walter Meier reserves the right to change specifications at any time and without prior
notice, without incurring obligations.

8
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 Lathe is assembled 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
Referring to Figure 1:
1 Lathe (not shown)
1 6” Four-Jaw Independent Chuck (A)
1 Faceplate (B)
2 Lifting Plates (C)
1 Cover (D)
1 4” Three-Jaw Universal Chuck (pre-mounted)
1 Four Way Tool Post (pre-mounted)
1 Steady Rest (pre-mounted)
1 Follow Rest (pre-mounted)
1 Operator's Manual (not shown)
1 Warranty Card (not shown)
2 Shear Pins* (E)
3 Chuck Jaws (F)
1 Single Tool Post Assembly* (G)
1 MT-2 Center* (H)
1 MT-3 Center* (I)
1 56T Gear* (J)
1 52T Gear* (K)
1 48T Gear* (L)
1 46T Gear* (M)
1 44T Gear* (N)
1 40T Gear* (O)
1 38T Gear* (P)
1 36T Gear* (Q)
1 32T Gear* (R)
1 Tension Roller Lever (S)
1 Handle (T)
1 Female Chuck Key* (U)
2 Male Chuck Keys (V)
1 #1 Cross Point Screwdriver* (W)
1 #1 Flat Blade Screwdriver* (X)
1 5pc Hex Wrench Set (Y)
2 Open End Wrenches – 8/10mm, 12/14mm (Z)
* parts marked with an asterisk are included in the tool box, stock no. BD920W-TB
Read and understand the entire contents of this manual before attempting set-up or
operation! Failure to comply may cause serious injury.
CAUTION
The three jaw chuck and the face plate have a set screw on their flanges that secures them to the
threaded spindle. Before removing the three jaw chuck or the faceplate, remove the set screw
completely from the flange. Failure to remove the set screw may cause damage to the threads on
the spindle. When installing either the jaw chuck or the faceplate, tighten the set screw firmly to
prevent the chuck or the faceplate from coming off the spindle during operation.
Figure 1

9
Set Up and Preparation for
Operation
To avoid twisting the bed, make sure the location to
which the lathe will be moved is absolutely flat and
level. Place a machinist’s level on the bed ways and
check for level side-to-side and front to rear. If
stand mounted, the stand must be fastened to the
floor. (An optional JET stand is available for this
lathe – order stock no. 321374.)
Remove rust protectant from all surfaces with
kerosene, diesel oil, or a mild solvent. Do not use
gasoline, paint thinner, or lacquer thinner, as these
may damage painted surfaces. After cleaning, wipe
with a clean, dry cloth and cover all machined
surfaces with a light film of machine oil.
Swing open the drive assembly end guard, and
mount the cover to the bottom of the guard using
three screws. (See Drive Assembly Exploded View,
index no. 11, for clarification.)
Carefully read the grounding instructions on pages
4 and 5. It is recommended that the BD920W Lathe
be connected to a dedicated, minimum 25 amp
circuit with a 25 amp circuit breaker or time delay
fuse. Local codes take precedence over
recommendations.
General Description
LatheBed
The Lathe bed is made of high-grade iron. By
combining high cheeks with strong cross ribs, a bed
of low vibration and rigidity is produced. The main
motor is mounted to the rear of the bed (Figure 2).
Headstock
The headstock (Figure 3) is cast from high grade,
low vibration cast iron. It is bolted to the bed with
four screws and uses four adjusting screws for
alignment. In the head the large main spindle is
mounted on two precision taper roller bearings. The
hollow spindle is a Morse taper No.3 with a 7/8”
bore
A quick change of the belt can be accomplished by
easing the tension on the idler (Figure 4).
To protect the machine against accidental damage,
a clutch is fitted to the reduction pulley at the 130
R.P.M. speed.




Figure 2
Figure 3
Figure 4
Headstock

10

Carriage
The carriage (Figure 5) is made from high-grade
cast iron. The sliding parts are smooth ground.
They fit the V on the bed without play. The lower
sliding parts can be easily and simply adjusted. The
cross slide is mounted on the carriage and moves
on a dovetail. Play in the cross slide may be
adjusted with the gibs.
Move the cross slide using the conveniently
positioned handwheel (Figure 5). There is a
graduated collar on the handwheel. One graduated
mark equals 0.0254 millimeters or 0.001 inches.
The top slide, mounted on the cross slide, can be
rotated 360º. The top slide and the cross slide travel
in dovetailed slides and have gibs, adjustable nuts,
and graduated collars.
A four-way tool post is fitted on the top slide. The
four-way tool post can be converted to a single tool
holder with parts enclosed in the toolbox (Figure 6).
See parts breakdown on page 38 for assembly of
tool holder.
For accurate facing operations, the carriage can be
locked by tightening the hex socket cap screw (A,
Figure 7).

Apron
The apron (Figure 8) is mounted on the bed. A half
nut is fitted to the apron. The half nut gibs can be
adjusted from the outside.
The half nut is engaged by the half nut lever.
The rack mounted on the bed, and a pinion
operated by a handwheel on the carriage, allow for
quick travel of the apron.
Figure 8


Figure 5
Figure 6
Figure 7
Half nut leverApron
Cross slide handwheel