Forged Collars, Spacers & Washers
Collars and spacers look trivial and are not. They set axial position, carry thrust load and often determine whether an assembly runs true.
Forged collars, spacers and thrust washers set axial position and carry thrust load. Face parallelism is a functional requirement because non-parallel faces tilt the assembly downstream, converting into shaft runout and cyclic bearing loading.
- Outside diameter
- 20 mm – 400 mm
- Thickness
- 3 mm – 100 mm
- Materials
- EN8, EN19, SS 304/316
- Faces
- Machined or ground
- Tolerance
- ±0.02 mm machined
Forged Collars, Spacers & Washers at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Outside diameter 20 mm to 400 mm
- Thickness 3 mm to 100 mm
- Machined to ±0.02 mm
- Face parallelism specified separately
Parallelism Sets Assembly Accuracy
A spacer with non-parallel faces tilts everything downstream of it. On a shaft assembly that tilt becomes runout, which becomes bearing load. Face parallelism is therefore a functional requirement, not a finishing detail.
- Non-parallel faces tilt the assembly
- Tilt becomes runout and bearing load
- Faces ground where specified
- Thickness held to drawing
Thrust Washers Carry Real Load
A thrust washer transfers axial load between rotating and stationary parts. Surface hardness and flatness determine its life, and a soft or dished washer wears rapidly and lets axial float develop.
People also ask
What tolerance is needed on a spacer?
Thickness to drawing, typically ±0.02 mm machined, with face parallelism specified separately since it governs assembly accuracy.
Should thrust washers be hardened?
Where axial load is significant, yes. A soft washer dishes and wears, allowing axial float to develop in the assembly.
Can you supply stainless collars?
Yes, in SS 304 and SS 316 with segregated handling to prevent carbon contamination.
Topics covered on this page
- collar
- spacer
- thrust washer
- parallelism
- axial load
- runout
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Why does spacer parallelism matter?
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Non-parallel faces tilt everything downstream, turning into shaft runout and cyclic bearing load.
Are thrust washers hardened?
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Where axial load is significant, yes — surface hardness and flatness determine wear life.
Can you make collars to drawing?
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Yes, from 200 pieces on existing tooling, or machined from forged blanks for smaller quantities.