Southbend SB1038F - Manual (Page 77)

For Machines Mfg. Since 7/09 EVS Toolroom Lathes
-71-
S E R V I C E
Leadscrew Shear Pin
Replacement
9mm
7mm
5.8mm
0.5mm
0.2mm 0.2mm
3mm
NOTE: Shear Pin Material = S45C (SAE 1045)
Figure 142. Shear pin specifications.
Tools Needed: Qty
Phillips Screwdriver #2 ........................................ 1
External Retaining Ring Pliers #1 ....................... 1
Magnet ................................................................... 1
Safety Glasses ....................................................... 1
To replace the shear pin:
1. DISCONNECT LATHE FROM POWER!
2. Remove the front and side feed access covers,
as shown in Figure 143.
3. Rotate the shroud washer so the cutout lines
up with the shear pin head, as shown in
Figure 144.
Figure 145. Shear pin access.
Rear
Position
Gap
4. Put on safety glasses.
5. Remove the retaining ring from its groove
and place it in the rear-most position away
from the shroud washer.
6. Move the shroud washer away from the
shear pin (to the rear position), as shown in
Figure 145, so there is enough of a gap to
remove the shear pin.
Figure 144. Shroud washer/pin alignment.
Shear Pin
Head
Shroud Washer
Cutout
Figure 143. Feed access covers removed.
Feed Access Cover