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    The SU Type coupling has a single flex plane, and is comprised of a single disc pack kit with two hubs. It is suitable for angular and axial misalignment only. Two SU couplings are often combined with a shaft to make a floating shaft coupling. The shaft can be hollow for long light weight floating shaft couplings.
Unit of Measure



N/A Lovejoy: CAD Models are accurate envelope dimensions only. Features such as bore size and keyway are not rendered or are only representative. Contact Lovejoy Technical Support or refer to product catalogs for details.



N/A SU110-6 CPLG 1.625/1.626 KW SS

Bore Size  

N/A 1.626 & 1.626 in

Hub Style

N/A Standard


N/A Disc Coupling


N/A Steel


N/A Bored


N/A 8.86 lb


N/A Metallic

Coupling Series

N/A SU-6

Coupling Type

N/A Disc

Dimensional Data


N/A 110-6

Keyway Size (W x D)

N/A 3/8 x 3/16 Both Ends in

Set Screw Style Coupling Size (Dimension T)

N/A 1/4-20 Both Ends

Length thru Bore

N/A 1.97 in50.04 mm

Dimension FD

N/A 4.330 in110.00 mm

Overall Length

N/A 4.270 in108 mm

Max. Bore (Dimensions ID1/ID2)

N/A 1.810 in46.00 mm

Dimension HD

N/A 2.560 in65.00 mm

Distance between Shaft Ends (Dimension BSE)

N/A 0.331 in8.40 mm

Cubic inches

N/A 80.05780 in³

Performance Data


N/A -40 to 450 ºF

Nominal Torque

N/A 5100 in·lb

Max. Torque

N/A 10200 in·lb

Max. Speed (Unbalanced)

N/A 7200 rpm

Max. Speed (Balanced)

N/A 18000 rpm

Max. Angular Misalignment

N/A 1.50 º

Torsional Stiffness x 10^6 (of one disc pack)

N/A 3.4 in·lb/rad

Rated Power at 100 rpm

N/A 8 hp6 kW



  • Unitized disc pack
  • Infinite life when properly aligned
  • Torsionally rigid without any back lash
  • No need for lubrication or maintenance
  • No wearing parts and high resistance to harsh environmental conditions
  • Larger sizes are available upon request
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