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 1/8X1/8 N/A 0.125 in N/A 0.125 in N/A EC050 N/A 0.748 in19.00 mm N/A No Keyway N/A 0.512 in13.00 mm N/A 1.80 in·lb
N/A EC050 BEAM 3/16X1/8 N/A 0.188 in N/A 0.125 in N/A EC050 N/A 0.748 in19.00 mm N/A No Keyway N/A 0.512 in13.00 mm N/A 1.80 in·lb
N/A EC075 BEAM 1/4X1/4 N/A 0.250 in N/A 0.250 in N/A ES075 N/A 0.748 in19.00 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC075 BEAM 3/16X1/4 N/A 0.188 in N/A 0.188 in N/A ES075 N/A 0.748 in19.00 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC075 BEAM 3/16X3/16 N/A 0.188 in N/A 0.188 in N/A ES075 N/A 0.748 in19.00 mm N/A No Keyway N/A 0.748 in19.00 mm N/A 5.00 in·lb
N/A EC100 BEAM 1/4X1/4 N/A 0.250 in N/A 0.250 in N/A ES100 N/A 0.984 in25.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC100 BEAM 1/4X3/8 N/A 0.250 in N/A 0.375 in N/A ES100 N/A 0.984 in25.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC100 BEAM 3/8X3/8 N/A 0.375 in N/A 0.375 in N/A ES100 N/A 0.984 in25.00 mm N/A No Keyway N/A 0.984 in25.00 mm N/A 11.00 in·lb
N/A EC100 BEAM 5/16X5/16 N/A 0.313 in N/A 0.313 in 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 1/2X1/2 N/A 0.500 in N/A 0.500 in N/A ES112 N/A 1.102 in28.00 mm N/A No Keyway N/A 1.102 in28.00 mm N/A 17.00 in·lb
N/A EC112 BEAM 3/8X1/2 N/A 0.375 in N/A 0.500 in N/A ES112 N/A 1.102 in28.00 mm N/A No Keyway N/A 1.102 in28.00 mm N/A 17.00 in·lb
N/A EC112 BEAM 3/8X3/8 N/A 0.375 in N/A 0.375 in N/A ES112 N/A 1.102 in28.00 mm N/A No Keyway N/A 1.102 in28.00 mm N/A 17.00 in·lb
N/A EC112 BEAM 5/16X5/16 N/A 0.313 in N/A 0.313 in 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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