Operating Instructions and Parts Manual
Manual Shrinker/Stretcher
Model MSS-1
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-756018
Ph.: 800-274-6848 Edition 3 08/2018
www.jettools.com Copyright © 2018 JET
1.0 IMPORTANT SAFETY
INSTRUCTIONS
WARNING – To reduce risk of injury:
1. Read and understand the entire owner’s
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 warning labels if they become
obscured or removed.
4. This shrinker/stretcher 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
shrinker/stretcher, do not use it until proper
training and knowledge have been obtained.
5. Do not use this machine for other than its
intended use. If used for other purposes, JET
disclaims any real or implied warranty and holds
itself harmless from any injury that may result
from that use.
6. Always wear ANSI Z87.1 approved safety
glasses or face shield while using this machine.
(Everyday eyeglasses only have impact
resistant lenses; they are not safety glasses.)
7. Before operating the machine, remove tie,
rings, watches, other jewelry, and roll sleeves
up past the elbows. Remove all loose clothing
and confine long hair.
8. Keep the floor around the machine clean and
free of scrap material, oil and grease.
9. Keep machine 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 after
completion of maintenance.
10. Do not over reach. Maintain a balanced stance
at all times, so that you do not fall or lean
against moving parts.
11. Use the right tool. Do not force a tool or
attachment to do a job that it was not designed
to do.
12. Give your work undivided attention. Looking
around, carrying on a conversation and "horseplay" are careless acts that can result in serious
injury.
13. Keep visitors a safe distance from the work
area. Keep children away.
14. Make your workshop child proof with padlocks,
master switches or by removing starter keys.
15. Use recommended accessories; improper
accessories may be hazardous.
16. Do not operate this machine while under the
influence of drugs, alcohol or any medication.
17. Keep tools sharp and clean for safe and best
performance.
18. Provide for adequate space surrounding work
area and non-glare, overhead lighting.
19. Use only JET factory authorized replacement
parts and accessories; otherwise, the warranty
and guarantee are null and void.
20. Use caution handling metal workpieces. Wear
leather gloves to prevent cuts from sharp
edges.
21. Keep fingers away from jaws, cams and other
pinch points during operation.
22. When finished using the tool, insert the locking
pin to prevent foot pedal movement.
WARNING: This product can expose you to
chemicals including lead which is known to the
State of California to cause cancer and birth
defects or other reproductive harm. For more
information go to http://www.p65warnings.ca.
gov.
WARNING: Some dust, fumes and gases
created by power sanding, sawing, grinding,
drilling, welding and other construction activities
contain chemicals known to the State of
California to cause cancer and 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 wellventilated area and work with approved safety
equipment, such as dust masks that are
specifically designed to filter out microscopic
particles. For more information go to
http://www.p65warnings.ca.gov/ and http://
www.p65warnings.ca.gov/wood.
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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, or possibly even fatal,
injury.
SAVE THESE INSTRUCTIONS
2.0 About this manual
This manual is provided by JET, covering safe operation and maintenance procedures for a JET Model MSS-1
Manual Shrinker/Stretcher. This manual contains instructions on installation, safety precautions, general
operating procedures, maintenance instructions and parts breakdown. Your machine has been designed and
constructed to provide consistent, long-term operation if used in accordance with the instructions as set forth in
this document.
If there are questions or comments, please contact your local supplier or JET. JET c an also be reached at our
web site: www.jettools.com.
Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.
Read and understand the entire contents of this manual before attempting assembly or
operation! Failure to comply may cause serious injury!
Register your product online -
http://www.jettools.com/us/en/service-and-support/warranty/registration/
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3.0 Table of contents
Section Page
1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2
2.0 About this manual .......................................................................................................................................... 3
3.0 Table of contents ............................................................................................................................................ 4
4.0 Specifications for Shrinker-Stretcher .............................................................................................................. 4
5.0 Setup and assembly ....................................................................................................................................... 5
5.1 Shipping contents ....................................................................................................................................... 5
5.2 Additional tools required ............................................................................................................................. 5
5.3 Assembly .................................................................................................................................................... 5
5.4 Installing jaw sets ....................................................................................................................................... 6
5.5 Locking pin ................................................................................................................................................. 6
6.0 Operation ....................................................................................................................................................... 7
6.1 General instructions and tips ...................................................................................................................... 7
6.2 General procedure for flange ..................................................................................................................... 7
7.0 User-maintenance .......................................................................................................................................... 7
7.1 Lubrication .................................................................................................................................................. 7
7.2 Additional servicing .................................................................................................................................... 7
8.0 Replacement Parts ......................................................................................................................................... 7
8.1.1 MSS-1 Shrinker/Stretcher – Exploded View ............................................................................................ 8
8.1.2 MSS-1 Shrinker/Stretcher – Parts List .................................................................................................... 9
9.0 Warranty and Service ................................................................................................................................... 10
4.0 Specifications for Shrinker-Stretcher
Model number .............................................................................................................................................. MSS-1
Stock number .............................................................................................................................................. 756018
Capacities:
Maximum thickness capacity, mild steel .................................................................................................... 16 ga.
Maximum thickness capacity, aluminum ................................................................................................... 18 ga.
Throat depth .............................................................................................................................. 6 in. (152.4 mm)
Throat height ............................................................................................................................. 2.5 in. (63.5 mm)
Maximum flange capacity ...................................................................................................... 1-1/8 in. (28.6 mm)
Main mate ri a l s :
Base ................................................................................................................................................... steel tubing
Wheels ....................................................................................................................................................... plastic
Stand ................................................................................................................................................... steel plate
Jaws ........................................................................................................................ hardened steel, HRC 40~45
Dimensions:
Overall dimensions, assembled (LxWxH) ................... 920 x 410 x 1175 mm (36-7/32 x 16-9/64 x 46-17/64 in.)
Shipping dimensions (LxWxH) .................................................... 118 x 50 x 21 mm (46-1/2 x 19-5/8 x 8-1/4 in.)
Weights:
Net weight (approx..) ........................................................................................................................... 38 kg (84 lb)
Shipping weight (approx..) ................................................................................................................ 50 kg (110 lb)
L= length; W=width; H=height
The specifications in this manual were current at time of publication, but because of our policy of continuous
improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring
obligations.
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Read and understand the entire
contents of this manual before attempti ng setup or operation! Failure to comply may cause
serious injury.
5.0 Setup and assembly
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 machine is assembled and
running properly.
Compare 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 instruction manual thoroughly for
assembly, maintenance and safety instructions.
2. Insert foot pedal assembly (D, Figure 5-2) into
stand. Make sure threaded link stud (E) is
pointed toward stand.
3. Continue inserting foot pedal assembly, while
guiding link stud up into recess, as shown in
Figure 5-3.
5.1 Shipping contents
1 Stand assembly
1 Base with wheels
1 Foot pedal
1 Foot pedal axle
4 Socket head cap screws, M10x20
4 Flat washers, M10
1 Spring
1 Link rod
1 Link rod axle
2 Jaw sets
1 Hex key, 6mm
1 Operating Instructions & Parts List
1 Warranty card
5.2 Additional tools required
Hex key, 8mm (not provided)
5.3 Assembly
1. Place base (A, Figure 5-1) on floor, and mount
stand (B) using four M10x20 socket hd. screws
and washers (C). Tighten screws securely.
For more permanent installation, stand may be
secured directly to floor, using lag screws (not
provided) or similar means, through the four
holes.
Figure 5-2
Figure 5-3
4. Align foot pedal pivot shaft with hole in stand,
and insert M10x16 socket head cap screw with
washer (F, Figure 5-4) into each side of hole.
Make sure threaded link stud (E) remains within
recess. Tighten screws securely with 8mm hex
key.
5. Install spring (G, Figure 5-4), first attaching it to
stand, then to foot pedal bar.
Figure 5-1
Figure 5-4
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6. Install link bar (H, Figure 5-5) onto link stud (E)
clockwise about 15 turns.
5.4 Installing jaw sets
Two jaws sets are provided – one for shrinking, one
for stretching.
Figure 5-5
7. Use any available items to block up foot pedal
to approximately 7-1/2 inches from top of base.
See Figure 5-6. (If stand is secured directly to
floor, measurement will be from floor.)
Figure 5-6
8. Continue turning link bar until top end of link bar
aligns with holes in upper rocker assembly, as
shown in Figure 5-7.
9. Install M8x16 socket head screw and washer
into both ends of pivot assembly, and tighten
screws securely with 6mm hex key.
10. Remove blocking from beneath foot pedal.
Figure 5-8
Select both jaws from the same set, and slide them
into frame, as shown in Figure 5-9. Adjust screw if
needed until jaws can be inserted. Top and bottom
jaws are identical, but must have matching
orientation when installed.
Tighten both socket head screws (F) with 6mm hex
key. Make sure jaws remain aligned while
tightening.
Store unused jaws in the attached tray, and hex key
in the attached tube.
Figure 5-9
Figure 5-7
5.5 Locking pin
When machine is not being used, insert clevis pin
into hole (Figure 5-10). This prevents foot pedal
movement and inadvertent clamping of the jaws.
Figure 5-10
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6.0 Operation
6.1 General instructions and tips
The shrinker/stretcher is used extensively in
automotive body industry for window channels,
wheel wells, dog legs and many other forms.
Compound curves are easily accomplished on this
machine by working alternate sides of the
workpiece.
Use a roller stand or other device to support very
long pieces.
Some users make a cardboard template of desired
shape, and frequently compare it to the workpiece
as it progresses.
6.2 General procedure for flange
1. Form a 90-degree bend in workpiece using
sheet metal brake (not included) or similar
device. Depth of flange should be 1-1/8 in. or
less.
2. Position workpiece between jaws. Press foot
pedal and release, moving workpiece through
jaws a little at a time. Work the leading edge
first, then move deeper into the workpiece.
3. The grooved jaw surf aces may leave markings
on workpiece; these can be ground or polished
out using fine abrasives.
7.0 User-maintenance
7.1 Lubrication
Lubrication of the shrinker/stretcher will depend
upon frequency of use. However, here are general
guidelines to follow.
1. Insert a multi-purpose machine oil into the fitting
atop the die frame, once a month, to lubricate
the linkages.
2. Keep jaws clean. Periodically clean the grooved
gripping surfaces with a bristle brush (not a wire
brush).
7.2 Additional servicing
Any additional servicing should be performed by an
authorized service technician.
Figure 6-1
Do not apply force to foot pedal
without a piece of sheet metal between jaws.
This will hasten jaw wear and may result in jaw
breakage.
8.0 Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call 1-800274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial Number of
your machine available when you call will allow us to serve you quickly and accurately.
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET.
Some parts are shown for reference only, and may not be available individually.
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8.1.1 MSS-1 Shrinker/Stretcher – Exploded View
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8.1.2 MSS-1 Shrinker/Stretcher – Parts List
Index No. Part No. Description Size Qty
1 ................ MSS1-01 ................... Link Rod................................................................... ...................................... 1
2 ................ MSS1-02 ................... Link Axle .................................................................. ...................................... 1
3 ................ TS-1504031 .............. Socket Head Cap Screw ......................................... M8x16 ........................... 2
4 ................ MSS1-04 ................... Lock Shaft ................................................................ ...................................... 1
5 ................ MSS1-05 ................... Wheel....................................................................... ...................................... 2
6 ................ MSS1-06 ................... Cam Rocker ............................................................. ...................................... 1
7 ................ MSS1-07 ................... Cam Rocker Shaft ................................................... ...................................... 1
8 ................ MSS1-08 ................... Side Plate ................................................................ ...................................... 2
9 ................ MSS1-09 ................... Set Collar ................................................................. ...................................... 4
10 .............. MSS1-10 ................... Oil Fitting ................................................................. M6 ................................. 2
11 .............. MSS1-11 ................... Die Frame ................................................................ ...................................... 2
12 .............. MSS1-12 ................... Die Frame Extension Spring .................................... ...................................... 2
13 .............. F012088 .................... Roll Pin ................................................................... 3x30 mm ....................... 2
14 .............. MSS1-14 ................... Side Plate Shaft ....................................................... ...................................... 2
15 .............. MSS1-15 ................... Special Washer........................................................ ...................................... 2
16 .............. TS-1504041 .............. Socket Head Cap Screw ......................................... M8x20 ........................... 2
17 .............. TS-1550061 .............. Flat Washer ............................................................. 8 mm ............................. 4
18 .............. TS-1504041 .............. Socket Head Cap Screw ......................................... M8x20 ........................... 4
19 .............. TS-1504061 .............. Socket Head Cap Screw ......................................... M8x30 ........................... 4
20 .............. TS-2284082 .............. Machine Screw, Pan Head, Phillips ......................... M4x8 ............................. 8
21 .............. MSS1-21 ................... Outer Die Cover ....................................................... ...................................... 4
22 .............. MSS1-22 ................... Inner Die Cover, Stretcher ....................................... ...................................... 2
23 .............. F012089 .................... Roll Pin .................................................................... 2x20 mm ..................... 20
24 .............. MSS1-24 ................... Extension Spring ..................................................... .................................... 10
25 .............. MSS1-25 ................... Stretcher Die 1 ......................................................... ...................................... 2
26 .............. MSS1-26 ................... Stretcher Die 2 ......................................................... ...................................... 2
27 .............. MSS1-27 ................... Inner Die Cover, Shrinker ........................................ ...................................... 2
28 .............. MSS1-28 ................... Shrinker Die 1 .......................................................... ...................................... 2
29 .............. MSS1-29 ................... Shrinker Die 2 .......................................................... ...................................... 2
30 .............. MSS1-30 ................... Extension Spring ..................................................... ...................................... 2
31 .............. MSS1-31 ................... Rubber Pad * ........................................................... ...................................... 1
32 .............. MSS1-32 ................... Plastic Pad ............................................................... ...................................... 2
33 .............. MSS1-33 ................... Base......................................................................... ...................................... 1
34 .............. TS-1532032 .............. Machine Screw, Pan Head, Phillips ......................... M4x10 ........................... 6
35 .............. MSS1-35 ................... Frame ...................................................................... ...................................... 1
36 .............. MSS1-36 ................... Pot Hook .................................................................. ...................................... 2
37 .............. MSS1-37A ................. Extension Spring ..................................................... 3-1/8” L ......................... 1
38 .............. TS-1505011 .............. Socket Head Cap Screw ......................................... M10x16 ......................... 2
39 .............. MSS1-39 ................... Clevis Pin ................................................................. ...................................... 1
40 .............. MSS1-40 ................... Hanging Chain ......................................................... ...................................... 1
41 .............. TS-1505021 .............. Socket Head Cap Screw ......................................... M10x20 ......................... 4
42 .............. TS-1550071 .............. Flat Washer ............................................................. 10 mm ........................... 4
43 .............. MSS1-43 ................... Pivot Shaft ............................................................... ...................................... 1
44 .............. MSS1-44 ................... Foot Pedal Weldment .............................................. ...................................... 1
45 .............. MSS1-45 ................... Link Stud .................................................................. ...................................... 1
46 .............. MSS1-46 ................... Link Shaft ................................................................. ...................................... 1
47 .............. MSS1-47 ................... Wheel....................................................................... ...................................... 2
48 .............. TS-1541021 .............. Hex Nut, Nylon Lock ................................................ M6 ................................. 2
49 .............. TS-1482081 .............. Hex Cap Screw ........................................................ M6x40 ........................... 2
50 .............. MSS1-50 ................... Tube Cap ................................................................. ...................................... 4
51 .............. MSS1-51 ................... Plastic Washer ......................................................... .......
52 .............. MSS1-52 ................... Cotter Pin ................................................................. 3.2x25 mm .................... 2
.................. TS-152707 ................ Hex Wrench (not shown) ......................................... 6mm .............................. 1
.................. LM000245 ................. ID Label, MSS-1 (not shown)................................... ...................................... 1
.................. LM000239 ................. Warning Label (not shown) ...................................... ...................................... 1
.................. JET-92 ....................... JET Logo (not shown) ............................................. 92 x 38mm .................... 1
.................. MSS1-STJ ................. Stretcher Jaw Assembly (includes #19~26) ............ ...................................... 2
.................. MSS1-SKJ ................. Shrinker Jaw Assembly (includes #19~21,23,24,27~30) ............................... 2
* requires bonding to pedal with general-purpose adhesive, not supplied
............................... 4
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9.0 Warranty and Service
JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please
contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday.
Warranty Period
The general warranty lasts for the time period specified in the literature included with your product or on the official
JET branded website.
• JET products carry a limited warranty which varies in duration based upon the product. (See chart below)
• Accessories carry a limited warranty of one year from the date of receipt.
• Consumable items are defined as expendable parts or accessories expected to become inoperable within a
reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects.
Who is Covered
This warranty covers only the initial purchaser of the product from the date of delivery.
What is Covered
This warranty covers any defects in workmanship or materials subject to the limitations stated below. This warranty
does not cover failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear,
improper repair, alterations or lack of maintenance. JET woodworking machinery is designed to be used with Wood.
Use of these machines in the processing of metal, plastics, or other materials may void the warranty. The exceptions
are acrylics and other natural items that are made specifically for wood turning.
Warranty Limitations
Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a
Two Year Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.
How to Get Technical Support
Please contact Technical Service by calling 1-800-274-6846. Please note that you will be asked to provide proof
of initial purchase when calling. If a product requires further inspection, the Technical Service representative will
explain and assist with any additional action needed. JET has Authorized Service Centers located throughout the
United States. For the name of an Authorized Service Center in your area call 1-800-274-6846 or use the Service
Center Locator on the JET website.
More Information
JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor
or visit the JET website.
How State Law Applies
This warranty gives you specific legal rights, subject to applicable state law.
Limitations on This Warranty
JET LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT.
EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN
IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
JET 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.
JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are
given as general information and are not binding. JET reserves 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
Product Listing with Warranty Period
90 Days – Parts; Consumable items
1 Year – Motors; Machine Accessories
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used
for industrial or commercial purposes
5 Year – Woodworking Machinery
Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist
Accessories; Shop Tools; Warehouse & Dock products; Hand Tools; Air Tools
NOTE: JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries,
Inc., or any of its successors in interest to the JET brand.
®
branded products are not sold in Canada by JPW Industries, Inc.
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427 New Sanford Road
LaVergne, Tennessee 37086
Phone: 800-274-6848
www.jettools.com
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