Smithy GN1300 - Manual (Page 67)

Low Range-Speed Set-up
For low-speeds (optional on early machines), you must convert to a double
drive belt configuration. Use the procedure below to set up for low speed (400
RPM or less) operations.
Step 1: Release the belt tensioned at the motor by rotating the tension lever
down.
Step 2: Remove the belt from the motor pulley by following steps 3-6 below.
Step 3: Loosen the cap screw on the shaft of the lathe/mill clutch inside the
pulley box and pull the selector lever outward to move the shifter fork arm away
from the shifter fork.
Step 4: Slide the single belt off the spindle pulley and the end of the main
drive spindle.
Step 5: Loosen the bolt that holds the gear quadrant and the reduction pulley
bracket in place. This will allow the two belts you are about to install to be
properly tensioned.
Step 6: Place the larger of the two belts on the smallest motor pulley sheave
and on the largest pulley sheave of the speed reduction pulley. Place the
smaller belt on the smallest sheave on the speed reduction pulley and the
largest sheave on the main drive spindle pulley.
Motor Motor
High Speed
Range
Mid Speed
Range
Figure 8.2 The high & mid-speed ranges only require the use of one belt
Figure 8.3 Loosen the cap screw from the lathe-mill clutch lever
Lathe/Mill
Clutch Lever
Shifter Fork Arm
Granite 1300 Series Operator’s Manual
8-4 For Assistance: Call Toll Free 1-800-476-4849