Page 60
7.12 OPTIONAL GAUGING EQUIPMENT
7.12A 48 INCH (137 CM) DELUXE BACK GAUGE
The 48 inch (122cm) back gauge mounts on the drop-off side of the machine and will reach all three
stations from one point. It is designed to be used as a length stop in the shear, punch and tooling stations.
7.13 URETHANE STRIPPER
Scotchman does not recommend this unit for all general punching applications. However, using this
specially designed "Non Deform" stripper unit does offer a significant advantage over a standard
stripper arrangement in reducing distortion when punching a confined pattern or series of holes in flat
bar or plate.
NOTE: THIS STRIPPER ONLY WORKS WITH #40 TOOLING. THE MAXIMUM HOLE
SIZES THAT CAN BE PUNCHED ARE 1-1/4 ROUND AND OVAL AND 3/4 SQUARE. THE
MAXIMUM MATERIAL THICKNESS FOR THIS STRIPPER IS 3/4”.
The action of this unit will minimize distortion in the work piece and in many cases eliminate costly
correction and straightening processes. Of course, there is a limit how much material can be removed in
a confined area without causing some deformation. Contact your dealer or Scotchman for advice.
Combining this unit with a linear feed repetitive stop system for punching a series of holes in flat bar will
significantly increase productivity.
Because of the action of this type of unit, particular attention must be paid when setting the stroke length.
The stripper unit moves in conjunction with the punch and extra care must be taken by the operator.
(Refer to the setting and operating instructions in this section.)
The maximum thickness which can be punched using this unit is 3/4" (7mm) in steel with a rated tensile
strength of 60,000 lbs. psi.
7.13A CHANGING THE URETHANE SPRINGS
If the unit is constantly over stroked or over a period of time, it may be necessary to renew the urethane
springs. REFER TO FIGURE 27 ON PAGE 61. The springs should be checked periodically. (A sure sign
of over stroking is cracking or splitting of the springs.)
Secure the unit in a vise by clamping the bottom plate (item11).
Loosen and remove both nyloc nuts (6). When loosening the nyloc nuts, if one or both tie rods (4)
become loose, remove the loose tie rod(s) from the base plate and remove the nut(s) from the tie
rod(s). Re-tighten the tie rod(s) into the base plate and lock in place, using a thread locking
solution such as Nutloc.
Remove the top plate (7) and spring spacers (1).
Remove the urethane springs (3).
Re-assemble the unit with new urethane springs and finger tighten both nyloc nuts.
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