0.25 TRAVEL TPI ADJUSTMENT SCREWS

Siskiyou TPI series adjustment screws are ideal for OEM and custom applications. They feature our single-wrench-size adjustment for capstan and hex drives and locking screw. The unique collet design incorporates a split-clamp mechanism used to preset adjustment screw tension, as well as locking screw movement. If the location of the locking screw is not ideal, it can be backed out and inserted from the opposite side.

The tip of the adjustment screw has been machined to accept a hard ball bearing (64 Rockwell) that can rotate in the end of the screw. This feature minimizes the amount of rotational torque transferred from the adjustment screw to the translation stage.

Product Features

• 20, 40, 80, 100, 127 or 170 threads pitch
• Fits 3/8-inch collet diameter products
• Integrated travel lock
• hex drive actuator
• Vacuum compatible versions available
• RoHS compliant→

Performance Specifications

• Travel/rotation:
• 170TPI: 150μm/rev
• 127TPI: 200µm/rev
• 100TPI: 254µm/rev
• 80TPI: 318µm/rev
• 40TPI: 635µm/rev
• 20TPI: 1270µm/rev

• Minimum controllable motion*
• 170TPI: 0.4µm
• 127TPI: 0.5µm
• 100TPI: 0.7µm
• 80TPI: 0.9µm
• 40TPI: 1.7µm
• 20TPI: 3.5µm

• Axial load 
• 50lb (127TPI and 170TPI) 
• 100lb (20TPI, 40TPI, 80TPI and 100TPI)

*MINIMUM CONTROLLABLE MOTION BASED ON 1° OF ROTATION