FSMR25-12-12-A, Ruland, Aluminium set screw style six beam coupling

Metric, Aluminium, Beam Coupling, Size: 25

Brand Ruland
Mfr Part No. FSMR25-12-12-A
Acorn Code FSMR25-12-12-A-RULAND
HS Code 8483 50 80 90
COO United States (US)



Ruland FSMR-A is a set screw style six beam coupling.

It is machined from a single piece of material and features two sets of three spiral cuts. This gives it higher torque capacity, lower windup, and larger body sizes than single or four beam couplings and allows for use in light duty power transmission applications such as coupling a servo motor to a lead screw.

FSMR-A is zero-backlash and has a balanced design for reduced vibration at high speeds of up to 6,000 RPM.

All hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities.

FSMR-A is made from 7075 aluminium for lightweight and low inertia. It is machined from bar stock that is sourced exclusively from North American mills and RoHS3 and REACH compliant.

FSMR-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.


Product Attributes
Manufacturer Product Code FSMR25-12-12-A
Basic Product Description Aluminium set screw style six beam coupling
Measurement Metric
UOM Each
Component Complete
Size 25
Bore Type Plain Bore
Hub Design Set Screw
Large Bore (mm) 12
Small Bore (mm) 12
od (mm) 25.4
Length (mm) 38.1
Large Bore (inch) 0.04
Weights (Kgs) 0.04
Material Aluminium
Screw Material Alloy Steel
Screw Finish Black Oxide
Number of Screws 4 ea

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