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For Machines Mfg. Since 8/09 Model SB1027
-53-
SERVICE
5. Loosen the two cap screws on the face of the
leadscrew nut shown in Figure 64.
Figure 64. Cross leadscrew nut and cap screws.
Cross Leadscrew
Nut & Cap Screws
6. Re-install the key onto the leadscrew so that
you can use the ball handle in the next step.
7. Use the T-handle hex wrench or similar
tool to rotate the adjustment plate on the
leadscrew nut in small increments, then
rotate the cross slide ball handle to check the
amount of backlash.
8. When you are satisfied with the adjustment,
re-tighten the two cap screws.
9. Re-install the parts previously removed in
the reverse order.
Belt Tensioning
Figure 65. Belt tensioning controls.
Tension
Adjustment
Lever
Motor Mount
Cap Screw
(1 of 2)
Adjustment
Cap Screw
Power is transferred from the motor to the
spindle with heavy-duty ribbed belts. With
normal use, these belts will gradually stretch
over time. When they do, perform the follow
procedure to re-tension them.
Tools Needed Qty
Hex Wrench 6mm .................................................1
Hex Wrench 10mm ...............................................1
To re-tension the belts:
1. DISCONNECT MILL FROM POWER!
2. Loosen the two motor mount cap screws, one
on each side of the motor (see Figure 65).
3. Push the belt tension adjustment lever
back with moderate force, then tighten the
adjustment cap screw in and against the
motor mounting plate to secure the setting.
4. Re-tighten the motor mount cap screws.