Smithy GN1300 - Manual (Page 24)

Pulley Box
The pulley box houses the drive pulleys, gears and power components.
L-1. Motor Pulley - A three-step pulley attached to the shaft of the motor.
L-2. Speed Reduction Pulley - Sits between the motor and spindle pulley and is used
for low speed operations when increased torque is desired.
L-3. Spindle Pulley - A two-step pulley attached to the main lathe spindle.
L-4. Change Gear A - A 30-tooth gear installed at the factory. The change gears only
need to be reconfigured when cutting metric threads.
L-5. Change Gear B - A 60 tooth gear installed at the factory. The change gears only
need to be reconfigured when cutting metric threads.
L-6. Change Gear C - A 66 tooth gear that rides behind change gear B (60 tooth gear)
and is installed at the factory. The change gears only need to be reconfigured when
cutting metric threads.
L-7. Change Gear D - A 60 tooth gear installed at the factory.
L-8. SCR Module - Converts the AC power coming into the machine to DC power for the
motor.
L-9. Inch/Metric Selector - Used when cutting threads. Pull the lever out toward the
operator when cutting metric threads. When cutting inch (SAE) threads, make sure the
lever is pushed in toward the machine.
Figure 4.7 Granite Pulley Box (Inside)
L-1
L-2
L-3
L-8
L-4
L-5
L-6
L-7
L-9
L-10
4: Machine Overview
4-7 Or Visit www.smithy.com