Vulcanized Fiber Motor Shaft Bushing
Vulcanized fiber motor shaft bushing is a machined insulating sleeve or spacer fitted between a shaft and the surrounding component. It is used when the motor design specifies electrical isolation together with a lightweight, machinable fiber part. As a direct manufacturer and supplier, we provide Vulcan Motor Shaft Fiber Bushing in made-to-drawing sizes with low minimum order quantities and fast sampling for both prototype and production runs.
Fit and drawing requirements
| Design point | Confirm before production |
|---|---|
| Shaft interface | Nominal shaft diameter, fit type, interference or clearance and installation method |
| Bushing geometry | ID, OD, length, wall thickness, chamfers, shoulders and slots |
| Tolerances | Roundness, concentricity, runout and finished-size inspection method |
| Service duty | Rotational speed, load, temperature rise, humidity and electrical isolation need |
| Assembly | Press-fit force, adhesive use, mating materials and prototype validation |
Typical applications
- Motor shaft insulating bushings and spacers
- Electrical isolation sleeves for rotating assemblies
- Custom machined vulcanized-fiber washers, collars and tubes
RFQ checklist
Send the finished-part drawing or sample, shaft diameter, fit requirement, ID, OD, length, geometric tolerances, operating speed, load, temperature, quantity and inspection plan. Prototype fit and runout should be approved in the actual assembly before volume production.
For unmachined tube stock, see our vulcanized fiber tube. For paper-based winding supports, see insulating kraft paper sleeves.
Explore the full insulation range
This construction is part of our electrical insulation tube range. Related constructions: G7 silicone glass laminate tube, insulating kraft paper sleeves. For fuse-body components, see the fuse tubes selection guide.
Frequently asked questions
What is a vulcanized fiber motor shaft bushing?
It is a machined sleeve made from dense vulcanized fiber that fits over a motor shaft to provide electrical insulation, wear resistance and a precise bearing seat.
Can motor shaft bushings be machined to tolerances?
Yes. The material is easily turned, bored and threaded, so inside diameter, outside diameter and length are finished to the approved drawing.
Motor shaft bushings are a machining job, so keep them at the machine shop
A vulcanized fibre shaft bushing is judged on fit: bore tolerance, concentricity and how the wall holds after turning. Those are machining outcomes, and they change the moment the part moves to a second supplier who re-reads the drawing. We machine these bushings on the same site that forms the fibre, so a tolerance revision is a change at the machine rather than a fresh negotiation.
- Plant-direct pricing on vulcanized fibre motor shaft bushings
- Prototype and small batches machined without a large order commitment
- Bore, outside diameter and length finished to the approved drawing
- ISO 9001 quality system covering fibre forming and machining
- SGS material testing available on the fibre
- RoHS and REACH documents on request
Motor shaft bushing: ordering and tolerance questions
Can you machine a small run of motor shaft bushings?
Yes. Prototype and low-volume machining is accepted, which suits designers who are still validating fit on the shaft.
What certification applies to vulcanized fibre bushings?
The material is formed and machined under an ISO 9001 quality system, SGS testing is available, and RoHS and REACH documents are supplied on request.
How fast will a bushing drawing be quoted?
Within one working day. An engineer checks bore tolerance, wall and shaft fit before the quotation is issued.
Request a quote
Send the drawing with bore, outside diameter, length, wall and concentricity requirements, plus shaft fit and operating temperature. We confirm machinability and tolerance before running the batch.