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    The ADB (Aluminum Double Beam) Series coupling enhances the beam coupling options available from Lovejoy Inc. The longer overall length allows the ADB series to span longer BSE (between shaft end) measurements.

    The aluminum material used in its construction keeps the coupling’s weight low. The ADB design offers two flex points allowing for greater angular misalignment, up to 7°. This design also allows for up to .024 inches of parallel misalignment. The torque capacity ADB series is more than double the range of the single beam designs, with the largest size having a torque capacity of 88 in-lbs.
Unit of Measure



N/A ADB3.5 BEAM CPLG 1/4X1/4

Coupling Size

N/A ADB3.5


N/A Double Beam Coupling


N/A Aluminum


N/A Clamp Screw


N/A Anodized Aluminum


N/A 0.01 oz

Weight (Complete Coupling w/ Min. Bores)

N/A 0.40 oz

Dimensional Data

Bore A

N/A 0.250 in

Bore B

N/A 0.250 in

Overall Length

N/A 1.000 in25.40 mm

Keyway Size

N/A No Keyway

Outside Diameter

N/A 0.626 in15.90 mm

Min. Bore (Dimensions ID1/ID2)

N/A 0.197 in5.00 mm

Max. Bore (Dimensions ID1/ID2)

N/A 0.315 in8.00 mm

Length thru Bore

N/A 0.256 in6.50 mm

Clamp Screw Size

N/A M2.5

Cubic inches

N/A 0.39188 in³

Performance Data

Max. Operating Temperature

N/A 200.00 ºF

Max. Speed

N/A 10000 rpm

Nominal Torque

N/A 6.20 in·lb

Max. Angular Misalignment

N/A 7.00 º

Axial Misalignment

N/A ± 0.010 in

Parallel Misalignment

N/A 0.008 in

Moment of Inertia

N/A 0.0010 lb·in²

Torsional Stiffness

N/A 2584.00 in·lb/rad



  • Zero backlash design
  • Simple one piece assembly
  • Aluminum material
  • Largest amount of angular misalignment capacity



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