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Quick Reference

Quantity1 per build (replaces standard Middle Body)

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Function

Drop-in replacement for the standard middle body that adds a controllable pivot joint. This component:
  • Maintains standard linear rail mounting and belt routing
  • Adds a pivot joint for setting the actuator angle relative to your mount
  • Recommended when using extrusion or bench mounts that benefit from tilt adjustment
This is a non-standard part. The default build uses the standard Middle Body.

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Compatibility

  • Drop-in replacement for the standard OSSM Middle Body
  • Works with the 350 mm linear rail used in OSSM kits
  • Designed to interface with pivot plates/brackets from supported mounts
Compatible mounts:
  • Material: PETG or PLA+ recommended; ABS/ASA or Nylon for high-heat environments
  • Layer height: 0.2-0.28 mm
  • Perimeters: 4-6 walls
  • Infill: 35-50% (gyroid or grid)
  • Supports: Only where required for the pivot cavity chamfers
Print in the default file orientation. Rotating this model weakens the layer lines at the pivot boss.

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Hardware

Use the hardware from your chosen mount kit. Typical items include:
  • Pivot through-bolt with matching nut or cam/handle
  • Flat washers and rubber/fiber friction washers for both sides of the pivot
  • Linear rail mounting screws (reuse from standard middle body)
For consistent pivot friction, place rubber or fiber washers between mating pivot faces. See the Extrusion Mount BOM for an example hardware list.

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Download Files

STL File

Download for slicing