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    The Beam flexible coupling is formed from one piece of aluminum rod. A spiral slot is cut through the length of the aluminum tube forming a “spring” center section referred to as a helical coil or beam. The flexure allowed by the beam portion of the coupling is capable of accommodating angular, parallel and axial misalignment while continuing to convey power between the attached shafts. This results in a single piece, true flexible coupling.

    The Miniature Beam coupling is designed for very light power transmission applications where accurate positioning of shafts is an essential requirement. It also has a very high tolerance to heat, chemicals, and corrosion that would be harmful to conventional elastomeric flexible couplings.

    The Miniature Beam coupling design is very well suited for small shaft applications and the inherent requirements of start/stop/reverse applications where zero backlash and extreme positioning accuracy are important. This coupling operates either clockwise or counter clockwise without sacrificing windup or torque capabilities.
Unit of Measure




Coupling Size

N/A EC075


N/A Single Beam Coupling


N/A Anodized Aluminum


N/A Clamp Screw


N/A Anodized Aluminum


N/A 0.03 oz

Weight (Complete Coupling w/ Min. Bores)

N/A 0.50 oz15.00 g

Dimensional Data

Bore A

N/A 0.157 in4.00 mm

Bore B

N/A 0.157 in4.00 mm

Overall Length

N/A 0.906 in23.000 mm

Keyway Size

N/A No Keyway

Outside Diameter

N/A 0.748 in19.00 mm

Min. Bore (Dimensions ID1/ID2)

N/A 0.157 in4.00 mm

Max. Bore (Dimensions ID1/ID2)

N/A 0.236 in6.00 mm

Length thru Bore

N/A 0.236 in6.00 mm

Clamp Screw Size

N/A M2.5

Cubic inches

N/A 0.50691 in³

Performance Data

Max. Operating Temperature

N/A 200.00 ºF

Max. Speed

N/A 10000 rpm

Nominal Torque

N/A 5.00 in·lb

Max. Angular Misalignment

N/A 5.00 º

Axial Misalignment

N/A ± 0.010 in

Parallel Misalignment

N/A 0.005 in

Moment of Inertia

N/A 24.9500 lb·in²

Torsional Stiffness

N/A 119.40 in·lb/rad



  • All-metal coupling
  • Easy to install – one piece
  • High angular misalignment capability to 5°
  • Anodized aluminum finish
  • Zero backlash design



  • Nominal torque, torsional stiffness, weight and moment of inertia are based on minimum bore size.
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