The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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.
EC Series - Single Beam Clamp Style Couplings - Imperial
EC Series - Single Beam Clamp Style Couplings - Imperial-2
Unit of Measure
Items EC Series - Single Beam Clamp Style Couplings - Imperial
68514456620
EC Series - Single Beam Clamp Style Couplings - Inch (Imperial) Bores 		EC Series - Single Beam Clamp Style Couplings - Imperial
68514458284
EC Series - Single Beam Clamp Style Couplings - Inch (Imperial) Bores 		EC Series - Single Beam Clamp Style Couplings - Imperial
68514456632
EC Series - Single Beam Clamp Style Couplings - Inch (Imperial) Bores 		EC Series - Single Beam Clamp Style Couplings - Imperial
68514456630
EC Series - Single Beam Clamp Style Couplings - Inch (Imperial) Bores 		EC Series - Single Beam Clamp Style Couplings - Imperial
68514456628
EC Series - Single Beam Clamp Style Couplings - Inch (Imperial) Bores
Description  N/A EC050-BEAM CP-1/8X1/8 N/A EC050-BEAM CP-3/16X1/8 N/A EC075-BEAM CP-1/4X1/4 N/A EC075-BEAM CP-3/16X1/4 N/A EC075-BEAM CP-3/16X3/16
Bore A N/A 0.125 in N/A 0.188 in N/A 0.250 in N/A 0.188 in N/A 0.188 in
Bore B N/A 0.125 in N/A 0.125 in N/A 0.250 in N/A 0.188 in N/A 0.188 in
Coupling Size N/A EC050 N/A EC050 N/A ES075 N/A ES075 N/A ES075
Overall Length N/A 0.748 in19.00 mm
Type N/A Single Beam Coupling
Keyway Size N/A No Keyway
Outside Diameter N/A 0.512 in13.00 mm N/A 0.512 in13.00 mm N/A 0.748 in19.00 mm N/A 0.748 in19.00 mm N/A 0.748 in19.00 mm
Min. Bore (Dimensions ID1/ID2) N/A 0.118 in3.00 mm N/A 0.118 in3.00 mm N/A 0.157 in4.00 mm N/A 0.157 in4.00 mm N/A 0.157 in4.00 mm
Max. Bore (Dimensions ID1/ID2) N/A 0.188 in4.77 mm N/A 0.188 in4.77 mm N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm
Length thru Bore N/A 0.197 in5.00 mm
Material N/A Anodized Aluminum
Style N/A Clamp Screw
Finish N/A Anodized Aluminum
Clamp Screw Size N/A 1-72 N/A 1-72 N/A 8-32 N/A 8-32 N/A 8-32
Weight N/A 0.01 oz N/A 0.01 oz N/A 0.03 oz N/A 0.03 oz N/A 0.03 oz
Weight (Complete Coupling w/ Min. Bores) N/A 0.20 oz N/A 0.20 oz N/A 0.40 oz N/A 0.40 oz N/A 0.40 oz
Max. Operating Temperature N/A 200.00 ºF
Max. Speed N/A 10000 rpm
Nominal Torque N/A 1.80 in·lb N/A 1.80 in·lb N/A 5.00 in·lb N/A 5.00 in·lb 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 4.1000 lb·in² N/A 4.1000 lb·in² N/A 20.1600 lb·in² N/A 20.1600 lb·in² N/A 20.1600 lb·in²
Torsional Stiffness N/A 42.80 in·lb/rad N/A 42.80 in·lb/rad N/A 119.40 in·lb/rad N/A 119.40 in·lb/rad N/A 119.40 in·lb/rad
Cubic inches N/A 0.19608 in³ N/A 0.19608 in³ N/A 0.41851 in³ N/A 0.41851 in³ N/A 0.41851 in³