Model SB1016/SB1036 | O P E R A T I O N | For Machines Mfg. Since 7/09 |
Threading
If you are unfamiliar with how to cut threads on a lathe, we strongly recommend that you read books, review industry trade magazines, or get formal training before beginning any attempting any threading projects.
Power Feed Lever
The feed ON/OFF lever must be in the fully up disengaged position or the internal lockout will prevent the half nut lever from applying the half nut. Also to avoid shearing the leadscrew shear pin, the carriage lock (Figures
Cross Feed
Gib lock
screw
Carriage
Lock
Feed ON/OFF |
|
Lever | Half Nut Lever |
Figure 93. Carriage controls.
Half Nut Lever
The half nut lever locks the carriage to the leadscrew which moves the cutting tool along the length of the workpiece (Figures
When threading, we recommend using the slowest speed possible and avoiding deep cuts, so you are able to disengage the half nut and prevent an apron crash!
Thread Dial & Chart Overview
The numbers on the thread dial are used with the thread dial chart to show when to engage the half nut during inch threading or threading Witworth threads. The thread dial gear must be engaged with the leadscrew for this to work. Loosen the knurled thumb knob on the thread dial, pivot the dial gear into mesh with the leadscrew, then tighten the hand knob (see Figure 95).
Leadscrew
Thumb
Knob
Dial Gear
Figure 95. Thread dial gear engaged with the
leadscrew.
Feed Control
Lever
Disengaged
Engaged
Halfnut Lever
and Halfnut
Disengaged
Engaged
