Illustrative drawing. Actual product is confirmed to your specification at quotation.
Couplings
Rigid Sleeve (Muff) Couplings
Rigid couplings join shafts that are accurately aligned and need no flexibility. A muff coupling is a sleeve with a keyway and set screws or a split design with bolts. Common on line shafts and vertical pumps.
- Joins aligned shafts rigidly
- Solid or split types
- Keyed and set screwed
Specifications
- Material
- SteelCast iron
- Type
- SolidSplit
- Size / section / duty
- Light dutyMedium dutyHeavy duty
- Standards
- Manufacturer's standard
Exact sizes, brands and availability are confirmed at quotation. Send the code or a photo of the old part.
Applications
- Line shafts and countershafts
- Vertical pump shafts
- Aligned, low-speed drives
- Repair of broken or short shafts
Technical reference
Choosing a coupling type
| Coupling | Torsionally flexible | Handles misalignment | Typical use |
|---|---|---|---|
| Jaw (spider) | Yes | Moderate | Motors to pumps, small conveyors, compressors |
| Pin and bush | Yes | Moderate | Pumps, fans, general machinery |
| Tyre | Yes | High | Crushers, mills, shock-loaded drives |
| Grid | Yes | Moderate | Conveyors, mixers, heavy shock loads |
| Gear | No | Angular, high torque | Steel mills, cement kilns, heavy drives |
| Chain | Limited | Small | Medium-speed drives with easy chain replacement |
| Disc | No | Angular | High-speed, precise drives, compressors |
| Fluid | Yes | Moderate | Soft starting of conveyors and crushers |
| Rigid sleeve / flange | No | None (shafts must be aligned) | Aligned shafts, vertical pumps |
General guidance. Final selection depends on torque, speed, shaft sizes, misalignment and service factor.
Related and matching products
Request a quote for Rigid Sleeve (Muff) Couplings
Give us the code, size, brand and quantity, or a photo of the old part. We reply within one business day.
Common questions
- Which sizes of rigid sleeve (muff) couplings do you supply?
- We supply rigid sleeve (muff) couplings across the size range (Light duty, Medium duty, Heavy duty). Send the code, dimensions or a photo of the old part and we confirm the match, availability and lead time at quotation.
- Which standards apply to rigid sleeve (muff) couplings?
- Most makers follow their own catalogue dimensions. Tell us the brand, model or existing part number and we will match it.
- Which brands can you supply?
- We supply Fenner, PIX and equivalent brands, and can quote alternatives where the application allows. Tell us your preferred brand and we confirm what is available.
- Can you supply in bulk or ship Pan India?
- Yes. We quote for single pieces and scheduled bulk supply, and ship Pan India. Confirm the quantity when you request a quote.
Need a quote on bulk or custom industrial supply?
Share your specifications and quantities — our technical team will respond with pricing and lead time within one business day.