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Aluminium bellows coupling with stainless steel bellows, clamp hubs, 7/8 by 3/4 inch bores

Ruland Manufacturing

Ruland Manufacturing BC32-14-12-A Bellows Coupling 7/8x3/4 in

SKU CH-JDFR-QMD1X

A bellows coupling with clamp-on hubs connects 7/8 in and 3/4 in shafts, handles 400 in-lb peak torque and 10,000 RPM, and allows 0.01 in parallel misalignment

  • TypeCouplings, Collars & Adapters
  • Precision alignment with 0.01 in parallel misalignment tolerance
  • High-speed capability up to 10,000 RPM for demanding applications
  • Strong torque handling at 400 in-lb maximum rating
  • Zero-backlash bellows design using stainless steel for accuracy
  • Compact 2.31 in overall length fits tight installations

Bellows Clamp Coupling 7/8 x 3/4 in

This coupling joins two shafts with different bore sizes, 7/8 in and 3/4 in. It transmits up to 400 in-lb of torque at speeds up to 10,000 RPM. The stainless steel bellows compensates for parallel misalignment up to 0.01 in. It suits motion control systems that require precise, backlash-free power transmission.

Shaft Diameter and Speed Compatibility

Verify that the driving and driven shafts measure exactly 7/8 in and 3/4 in diameter. Confirm the application speed does not exceed 10,000 RPM and that torque stays within the 400 in-lb peak or 200 in-lb non-reversing dynamic rating. Ensure the 2.31 in overall length and 2 in clearance diameter fit within the available machine envelope.

Clamp-On Hubs and Prop 65 Notice

The clamp-on hubs secure to round shafts without keys or set screws, simplifying installation and removal. Aluminium hubs keep rotating mass low while the stainless steel bellows resists corrosion. The product carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm.

Highlights

  • Precision alignment with 0.01 in parallel misalignment tolerance
  • High-speed capability up to 10,000 RPM for demanding applications
  • Strong torque handling at 400 in-lb maximum rating
  • Zero-backlash bellows design using stainless steel for accuracy
  • Compact 2.31 in overall length fits tight installations

Specifications

TypeCouplings, Collars & Adapters

Questions about this item

What comes with the BC32-14-12-A coupling and what must be purchased separately?

The coupling includes two clamp hubs with 7/8 in and 3/4 in bores, a stainless steel bellows, and clamp hardware. Shafts, keys, and alignment tools are not included.

How do I choose between the listed bore combinations for this model?

This model is fixed at 7/8 in on one hub and 3/4 in on the other. Select it only when your shafts match those exact diameters; other bore pairs require a different part number.

What does the 400 in-lb maximum torque mean once the coupling is installed?

It is the peak torque the bellows can transmit without damage. For continuous non-reversing loads, stay at or below 200 in-lb to maintain rated life and misalignment capacity.

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