(636) 745-7757
Fax: (636) 745-2874
Division of Mittler Corp.
P.O. Box 110 Foristell, Missouri 63348
10 Cooperative Way Wright City, MO 63390
550 Shrinker / Stretcher
Installation / Operation / Maintenance
1. Secure the tool to the work bench. Two holes are drilled and tapped into the body of the tool to accept two 3/8 - 16 bolts.
It can also be mounted on a vise if portable on-the-job field use is desired. The more rigid you secure it, the easier it is to
use.
2. Try the tool using a sample piece of metal first to get the "feel" of it. .
3. When forming any metal, work the leading edge first. This "breaks down" the maximum resistance and permits easy and
accurate working thereafter.
4. Move the metal back and forth as you apply pressure to the handle until the desired radius is obtained. The control of
these tools lies in the pressure exerted in the handle as the metal is moved back and forth between the jaws.
5. The jaws of both tools are "toothed" so as to exert a better grip on the metal. These teeth leave slight markings
depending on the hardness of the metal and can quickly be removed with either abrasive cloth or wheel.
CAUTION TIPS:
Notice when you receive your tool that an insert is between the teeth. NEVER press without a separator between jaws:
1.
ALWAYS insert metal pieces or other material divider between jaws when not in use.
2. Take handle out of fulcrum slot when not in use to avoid accidental press.
\\Mbserver01\engineering\Product\Product Documentation\550 Shrinker Stretcher\550 Instructions.doc Rev1 7-13-2006
PART# QTY. PART DESCRIPTION
9-1 1 BODY
9-2 1 PRESSURE ARM
9-3 1 FULCRUM ARM
9-4 1 HANDLE WITH VINYL GRIP
9-5 1 PRESSURE ARM PIN
9-6 1 FULCRUM ARM PIN
9-9 2 LARGE JAW (SHRINKER) Not Sold Separately. See Cartridge Kits Below
9-10 2 SMALL JAW (SHRINKER) Not Sold Separately. See Cartridge Kits Below
9-11 1 SUSPENSION WIRE (SHRINKER) Not Sold Separately. See Cartridge Kits Below
9-12 1 UPPER PRESSURE V BLOCK (SHRINKER) Not Sold Separately. See Cartridge Kits Below
9-12A 1 LOWER PRESSURE V BLOCK (SHRINKER) Not Sold Separately. See Cartridge Kits Below
9-13 2 PRESSURE SPRING Not Sold Separately. See Cartridge Kits Below
9-14 1 VINYL GRIP FOR HANDLE
9-18 1 PRESSURE ARM RELEASE SPRING
9-27SH 1 COVER FOR SHRINKER Not Sold Separately. See Cartridge Kits Below
9-27ST 1 COVER FOR STRETCHER Not Sold Separately. See Cartridge Kits Below
9-28 4 SOCKET HEAD SCREW (8-32 x 318)
9-28W 4 EXT. TOOTH LOCK WASHER
9-38 2 MACHINE SCREW (8-32 X 318 ) Not Sold Separately. See Cartridge Kits Below
9-154 2 STRETCHER JAW (SPRING SLIDE) Not Sold Separately. See Cartridge Kits Below
9-155 2 STRETCHER JAW Not Sold Separately. See Cartridge Kits Below
9-156 1 UPPER PRESSURE BLOCK (STRETCHER) Not Sold Separately. See Cartridge Kits Below
9-156A 1 LOWER PRESSURE BLOCK (STRETCHER) Not Sold Separately. See Cartridge Kits Below
9-174 2 RIVET
9-175 1 SUSPENSION WIRE (STRETCHER) Not Sold Separately. See Cartridge Kits Below
9-176 2 MACHINE SCREW (8-32 x 1) Not Sold Separately. See Cartridge Kits Below
SHRINKER CARTRIDGE
COMPLETE
550-511
STRETCHER CARTRIDGE
COMPLETE
550-512
GENERAL MAINTENANCE
Before using your Shrinker or stretcher a small amount light weight grease as outlined below make your tool work smoother
and prevent wear.
Lubricate (light weight grease) the pivot point between the pressure arm (#2) and the fulcrum arm (#3).
Lubricate (light weight grease) on Shrinker Upper & Lower Pressure V Block (#12 & 12A).
Lubricate (light weight grease) on Stretcher Upper & lower Pressure Block (#156 & 156A).
Clean the jaws occasionally. Blowing them out with an air hose helps but it doesn't do the job thoroughly. Vacuuming hel ps to
get filings out. The best way to maintain the jaws is to periodically disassemble them and clean as follows:
1. Remove Shrinker or Stretcher cartridge (cover/jaw assembly) by loosening four socket head screws.
2. Take out upper jaws and V blocks (Shrinker) or upper jaws and pressure block (Stretcher) as a single
assembly. Be careful! DO NOT lose the spring between the jaws!
3. Remove suspension wire.
4. Take notice as to how the Shrinker jaws are inserted. A small jaw is opposite a larger jaw, top to bottom.
5. Clean the two upper jaws with a non-hazardous metal cleaner and a file card (brush). DO NOT use a wire
brush or a wire wheel.
6. Always brush in the direction of the Teeth (with the grooves).
7. Clean the V block (Shrinker) or pressure block (Stretch er).
8. Re-assemble the upper jaws and set aside.
9. After removing the two machine screws at the lower end of the cover, remove the bottom jaws by lifting and
taking out as a single unit with the V block (Shrinker) or pressure block (Stretcher). Clean all as described
previously.
10. Replace jaws. Be careful to locate larger Shrinker jaw opposite small Shrinker jaw. When replacing the V
blocks (Shrinker) or pressure blocks (Stretcher), chamfered corners face front.
11. 0il jaws lightly when not in use for extended periods.
12. For best operating results, clean the jaws after every job.
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