Operating and Maintenance Instructions
Mini Air Die Grinder
Model JNS-7032
WALTER M EIE R (Manufac turing) Inc .
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-JNS7032
Ph.: 800-274-6848 Revision B1 04/2013
www.waltermeier.com Copyright © 2013 Walter Meier (Manufacturing) Inc.
W AR RAN T Y AND S ERV IC E
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 Authori zed Service Centers can authorize warranty repair, assist you in obtaining parts, or
perform routine maintenance and major repair on your JET
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 W MH Tool Group distributor, or visit jettools.com.
WARRANTY
This JET product car ries a limited 90-DAY WARRANTY.
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 C OVERED ?
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?
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 LIMITATIO N MAY NOT APPLY TO YOU.
WALTER MEIER SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR
FOR INCIDENTAL, CONTINGENT, SPECI AL, OR CONSEQUENTI AL 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.
® t ools. For the name of an Authorized Service Center in
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1. Read and understand this entire manual before attempting assembly or operation.
2. Read and understand t he warnings posted on the tool and in this m anual. Failure to com ply with all of
these warnings may c ause serious i njury.
3. Replace the warning labels if they become obscured or remov ed.
4. This die grinder is designed and intended for use by properly t r ained and experienced personnel only.
If you are not familiar with the proper and safe operation of a die grinder, do not use until proper
training and knowledge have been obtained.
5. Do not use this tool for other than its intended use. If used for other purposes, Walter Meier
(Manufactur ing) Inc., di sclaims any real or implied warranty and hol ds itself harmless from any injury
that may result from that use.
6. Always wear approved saf ety glasses/f ace shiel ds while using thi s di e gri nder. (Ever yday ey eglasses
only have impact resi stant lenses; they are not safety gla sses.)
7. Wear ear protector s (plugs or muffs) if the noise exc eeds normal levels.
8. Use gloves if needed when operating the di e grinder. Keep hands and b ody away from the working
area of the tool.
9. Some dust created by power sanding, sawing, grinding, drilling and other construction activities
contain chemi cals known to cause cancer , bir th defects or other r eproductiv e harm . Some exampl es
of these chemic als are:
• Lead from lead based paint.
• Crystalli ne sil ic a from bricks, cement and other m asonry pr oduc ts.
• Arsenic and chromium from chemically treated lum ber .
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 tool whil e tired or under the influence of drugs, alcohol or any medicati on.
11. Maint ain proper bal ance and keep your footi ng at all tim es. Non-sli p footwear or anti -skid f loor strips
are recommended.
12. Befor e operati ng this die gri nder, remov e tie, rings, watches and other jewelry, and roll sleeves up
past the elbows. Remove all loose clothing and confine long hair.
13. Exc essive ai r pr essure and too m uc h free r otati on may decrease t he l if e of the t ool and m ay cause a
hazardous situat ion.
14. Check air hoses for wear, and keep them away from heat and sharp edges. Do not carry the die
grinder by the ai r hose.
15. Do not use this air tool near flammable objects or potentially ex plosive environments.
16. Do not leave a connected tool unatt ended. When not in use, disconnect tool from the air source.
17. Disconnect die grinder from air supply before maki ng adjustments or changing accessori es.
18. Keep work area clean and free of clut ter.
19. Keep visitors a safe di stanc e from the work area. Keep children away.
20. Giv e your work undivi ded attention. Looki ng around, carryi ng on a conversati on and “horse-play” ar e
careless acts that can r esul t in serious injury.
21. Do not f orce a tool or attachment to do a j ob for which i t was not designed. The ri ght tool will do the
job better and saf er .
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22. Repetitiv e moti ons and/or exposure to constant vi bration can be harmful to hands and arm s. Take
breaks and relax your hands occasionally during ex tended operation of the di e gri nder .
23. Compr essed air can be harmf ul if directed toward sensi tive ar eas of the body, and m ay propel small
particles caught in the air stream. Exercise proper c aution.
24. Use recommended accessories; i mproper accessories may be hazardous.
25. Maintain tools with car e. Keep the die grinder clean and oiled for best and safest perf ormanc e.
Specifications
Stock Number............................................................................................................................. JNS-7032
Collet Size (in.) ..................................................................................................................................... 1/4
Horsepower .......................................................................................................................................... 1/4
Free Speed (no load) (RP M ) ........................................................................................................... 25,000
Required Air Pr essure (PSI)................................................................................................................... 90
Average Air Consumption (CFM) ............................................................................................................. 4
Air Inlet Diameter (in.) ................................................................................................................... 1/4 NPT
Air Hose Inside Diameter (in.) ............................................................................................................... 3/8
Vibration V alue (m/ s
Overall Lengt h (in.) .................................................................................................................................. 6
Noise Level (dB) .................................................................................................................................... 93
Weight (Shipping/Net)(lbs.) ................................................................................................................ 1/0.8
The above specifications were current at the time this m anual was published, but because of our policy of
continuous improvement, Walter Meier (M anufacturing) Inc. , reserves the right to change speci fications at
any time and without pri or notice, without incurri ng obl igations.
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) ........................................................................................................................... 2.2
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Unpacking
The box should i nclude 1 Mini Air Die Grinder
and 2 Wrenches. Any mi ssing parts should be
reported to your JET
instruction manual thoroughly for operation,
maintenance and safety instructions.
® distributor. Read this
Operation
1. The Di e G ri nder must be pr oper ly lubr i cated
before operating. See “Maintenance”
section for lubricating instructions.
2. Remove the pr otective cap fr om the air inlet,
and connect the ai r supply hose. Make sure
the air pressure is set to 90psi .
IMPORTANT: Connecting a quick-change
coupling directly to the Die Grinder is not
recommended, as vibration may cause the
connection to fail. Instead, add a leader
hose and install any qui ck-change c oupli ngs
farther down the li ne.
3. Loosen the collet nut using the two
wrenches on the flats of the collet nut and
collet hol der (Fi gure 1). Keep t he wrench on
the collet hol der stationary whil e turning the
wrench on the coll et nut .
Figure 1
4. Install a gr inding point (not included) into the
collet and re-tighten the collet nut securely
using the wrenches.
5. Press forward on the safet y lever and down
on the trigger (Figure 2). How f ar down the
trigger i s pressed det erm i nes rotat i on speed
of the tool.
Maintenance
The Die Grinder should be lubricated daily (or
before each use) wit h air tool oil through t he air
inlet. Dur ing c ontinual operat ion, it shoul d be reoiled every 1 to 2 hours. Thi s can be done either
with an in-line oiler, or manually. If done
manually, pr oc eed as follows:
1. Disconnect the air hose fr om the die grinder.
2. Place one or two drops of air tool oil* into
the air inlet (Fi gur e 3) .
[*NOTE: Air tool oil not provided. It may be
purchased from your JET dealer, or is
available at most major hardware and tool
stores. SAE #10 weight oil may be used as
a substitute. Do not use detergent oil.]
Figure 2
Figure 3
3. Re-connect the air. Run the Die Grinder
without load f or a few seconds to distri bute
the oil throughout the tool.
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4. When you are finished operating the Die
Grinder, before storing it disconnect the air
hose and place 4 or 5 drops of air tool oil
into the air inlet; re-connect the air and run
the tool for a few seconds to distribute the
oil.
5. Avoid storing the grinder in very humid
locations which prom otes rusting of internal
mechanisms, and always oil it before
storage.
Air Connection
1. Make sure that the ai r compressor suppli es
clean air at the correct CFM for the die
grinder.
unclean air will shorten the tool’s life and
may create a hazardous situation.
2. Set air pressure to 90 psi.
3. Drain the water f r om the air c om pr essor tank
daily, as well as any conde nsation from t he
air lines. W ater in the air line may ent er the
tool and cause dam age.
4. Change filters on the air sy stem on a regular
basis.
5. Air line pressure should be increased
accordingl y to compensate f or ext ra long ai r
hoses (usually over 25 feet). I nsi de diameter
of the hose must be a minimum of 3/8”.
Excess air pressure and/or
Troubleshooting
Trouble Probable Cause Remedy
Air pressure is too low. Adjust air pressure to 90p si .
Die Grinder does not
operate at normal
speed; or speed
remains constant as
trigger is pressed.
Stops operating.
Torque is dimi nished. Air leak age.
Starts immediately as
soon as air is
connected without
trigger being pr essed.
Abnormal vibration
and/or excessive
heat develops in the
tool.
Air lines are twisted, or there is a
blockage in them .
Air compressor is malfunctioning, or is
not suffici ent capac ity for the tool.
Air regulat or i s malf unc tioning.
No air pressure.
Trigger or thr ottl e v alv e is
malfunctioning.
Throttle v alv e or tri gger is
malfunctioning.
Improper l ubri c ation.
Untwist or clean out air lines.
Replace air compr essor.
Have regulator repaired or replaced at
an authorized service center.
Check air compressor and hoses.
Make sure compressor is set at 90psi,
and air lines are not twisted.
Have throttle valve/trigger inspected
and repaired at an authorized service
center.
Check connections at the air inlet, orings, etc. Mak e adjustm ents/repairs
as needed.
Inspect and repair throttle valve
and/or trigger.
Lubricate pr oper ly ac c or ding to
instructions in this manual.
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To order parts or reach our service department, call 1-800-274-6848 Mon day through Friday (see our
website for business hours). Hav ing the Model Number and S erial Number of your tool availabl e when
you call will all ow us to serve y ou quic kl y and ac c urately.
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WALTER M EIE R (Manufac turing) Inc .
427 New Sanford Road
LaVergne, Tennessee 37086
Phone: 800-274-6848
www.jettools.com
www.waltermeier.com
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