You have 0 items in your cart

     |      +1 (231) 400-4884    Quote RequestOnline Store

You have 0 items in your cart

PD438SXP: Knob – Sliding Expansion

Part Number: PD438SXP


  • Mates with all Model 438 Cylinder Locks
  • Allows for thermal axial expansion
  • Slides laterally 1/8″
  • 2.500″ H (overall) x 1.500″ Dia.
  • Retainer Ring: 2.750″ Dia. x .375″ Thick
  • Four counter-bored holes for 1/4″ bolts

Spec SheetLayout for Sliding KnobsInstallation GuidelinesProper and Safe Operation Guidelines

The sliding knobs were designed to be used on a plastics thermoforming mold to allow for thermal expansion of the tooling. This allows the user to change out a mold while it is still hot, rather than waiting for it to cool down and return to “ambient size”. Please click the corresponding yellow button above to view the proper layout of the knobs for thermal expansion. These knobs slide in one direction only, and positioning them in the recommended layout allows your warm tooling to grow thermally in all directions. Use of the sliding knobs for other purposes such as providing extra “play” or “slop” may or may not work. Thorough testing is recommended for all non-standard concepts and applications of the sliding knobs.

SKU: PD438SXP Categories: ,


  1. Tooling Technology has no way of testing every possible scenario in which our products could be used. If you are unsure about choosing the right product for your proposed application, please contact us.
  2. The published load ratings for each product are reliant on mating the knobs and cylinders with fasteners that are compatible with those respective loads.

Compatible Products: