We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Stainless steel six-beam clamp coupling, 3/4 inch diameter, 1-1/4 inch length

Ruland Manufacturing

Ruland Manufacturing FCR12-4-4-SS 6-Beam Coupling 1/4 x 1/4 In

SKU CH-MMS6-P8507

Six-beam stainless steel coupling joins two 1/4 inch shafts with 3 degree angular and 0.008 inch parallel misalignment capacity

  • Zero backlash design enables precise motion control
  • Six-beam stainless steel construction handles 41 in-lb torque
  • Clamp-on locking secures 1/4 in shafts without keys
  • Rated for 6,000 RPM high-speed applications
  • Angular misalignment capacity of 3 degrees protects connected components

Precision Motion Coupling

The Ruland FCR12-4-4-SS is a six-beam flexible coupling machined from stainless steel for inch-dimension shafts. It connects two 1/4-inch round bores in motion-control systems where precise torque transfer and misalignment compensation are required.

Torque Capacity Decides Fit

Maximum torque is rated at 41 in-lb with torsional stiffness of 12.66 in-lb per degree, limiting use to light-duty positioning stages and instrumentation drives. Buyers whose application exceeds this torque value must select a larger coupling.

Clamp-On Hubs Simplify Assembly

Integral clamp screws lock each hub to the shaft without keys or set-screw flats, reducing installation time and preserving shaft integrity. The design also allows zero-backlash operation at speeds up to 6,000 RPM.

Highlights

  • Zero backlash design enables precise motion control
  • Six-beam stainless steel construction handles 41 in-lb torque
  • Clamp-on locking secures 1/4 in shafts without keys
  • Rated for 6,000 RPM high-speed applications
  • Angular misalignment capacity of 3 degrees protects connected components

Specifications

No published specifications for this item yet.

Questions about this item

What does the 41 in-lb torque rating mean for my setup?

The coupling can transmit up to 41 in-lb of torque before slipping or deforming, so select it for applications staying below that limit.

How does the clamp-on locking affect shaft holding?

The clamp-on design uses screws to grip each 1/4 in round bore evenly, providing concentric holding without marring the shaft.

What shaft spacing and alignment does the 1 1/4 in overall length require?

The 1 1/4 in overall length sets the distance between shaft ends, while allowing 3 deg angular, 0.008 in parallel and 0.005 in axial misalignment.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.