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.
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Item #

Description 

Bore A

Bore B

Coupling Size

Overall Length

Keyway Size

Outside Diameter

Nominal Torque

N/A EC050 BEAM 3MM X 3MM N/A 0.118 in3.00 mm N/A 0.118 in3.00 mm N/A ES050 N/A 0.512 in13.00 mm N/A No Keyway N/A 0.512 in13.00 mm N/A 1.80 in·lb
N/A EC075 BEAM 4MM X 4MM N/A 0.157 in4.00 mm N/A 0.157 in4.00 mm N/A EC075 N/A 0.906 in23.000 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC075 BEAM 5MM X 5MM N/A 0.197 in5.00 mm N/A 0.197 in5.00 mm N/A EC075 N/A 0.906 in23.000 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC075 BEAM 6MM X 6MM N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm N/A EC075 N/A 0.906 in23.000 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC100 BEAM 6MM X 6MM N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm N/A EC100 N/A 1.260 in32.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC100 BEAM 8MM X 8MM N/A 0.315 in8.00 mm N/A 0.315 in8.00 mm N/A EC100 N/A 1.260 in32.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC100 BEAM 10MM X 10MM N/A 0.394 in10.00 mm N/A 0.394 in10.00 mm N/A EC100 N/A 1.260 in32.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC112 BEAM 10MM X 10MM N/A 0.394 in10.00 mm N/A 0.394 in10.00 mm N/A EC112 N/A 1.496 in38.00 mm N/A No Keyway N/A 1.102 in28.00 mm N/A 17.00 in·lb
N/A EC112 BEAM 12MM X 12MM N/A 0.472 in12.00 mm N/A 0.472 in12.00 mm N/A EC112 N/A 1.496 in38.00 mm N/A No Keyway N/A 1.102 in28.00 mm N/A 17.00 in·lb
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