S E R V I C E | For Machines Mfg. Since 3/11 |
Leadscrew Shear Pin Replacement
The leadscrew is secured to a connecting collar that is part of the headstock drivetrain with the use of a
Contact South Bend to order a replacement shear pin (Part Number PSB10160927) or use the specifications in Figure 127 to fabricate your own.
| 10.54mm |
| 8.75mm |
5.8mm | 3.74mm |
| 0.5mm |
0.2mm | 0.2mm |
NOTE: Shear Pin Material = S45C (SAE 1045) | |
Figure 127. Shear pin specifications.
Tools Needed: | Qty |
External Retaining Ring Pliers #1 | ........................ 1 |
Magnet | 1 |
Safety Goggles | 1 |
Blow Gun w/Compressed Air | 1 |
Light Machine Oil | As needed |
To replace the shear pin:
1.DISCONNECT LATHE FROM POWER!
2.Clean debris and grime from the shear pin area (see Figure 128).
Location of
Shear Pin
Figure 128. Location of shear pin.
3.Rotate the shroud washer on the leadscrew (see Figure 129) so that the cutout lines up with the shear pin head.
Shear Pin | Shroud | |
Head | ||
Washer | ||
|
Cutout
Figure 129. Shroud washer and shear pin alignment.
4.Put on safety glasses.
If you fabricate your own shear pin, make sure to use the material and dimensions specified in Figure 127. Otherwise, the shear pin may not provide the intended protection and lathe damage could result.
