• The AL Type coupling consists of two standard AL Type hubs and one spider (find under L Type components, or the AL section for AL150).
  • Unless stated otherwise, hub torque and horsepower ratings assume a SOX(NBR) rubber spider is being used.
Unit of Measure



N/A AL090 HUB 9/16 1/8X1/16KW

Hub Style

N/A 2

Coupling Type

N/A Jaw


N/A Aluminum


N/A Silver

# of Jaws

N/A 3

Elastomeric Member

N/A SOX (NBR) Rubber


N/A 0.25 lb

Weight - Solid

N/A 0.40 lb

Weight (Complete Coupling w/ Max. Bores)

N/A 0.50 lb

Dimensional Data

Bore Size 

N/A 9/16 in

Coupling Size

N/A AL090

Thread (Dimension T)

N/A 1/4-20

Keyway Size (W x D)

N/A 1/8 x 1/16 in

Length thru Bore

N/A 0.910 in23.11 mm

Overall Length

N/A 2.340 in59.44 mm

Min. Bore (Dimensions ID1/ID2)

N/A 0.250 in13.00 mm

Max. Bore (Dimensions ID1/ID2)

N/A 0.875 in22.00 mm

Hub Length

N/A 1.430 in36.32 mm

Dimension G

N/A 0.52 in13.21 mm

Dimension HD

N/A 1.530 in38.86 mm

Dimension SL

N/A 0.340 in8.64 mm

Cubic inches

N/A 6.42699 in³

Performance Data

Nominal Torque

N/A 144 in·lb

Max. Speed

N/A 9000.00 rpm

Moment of Inertia (Solid) WR2

N/A 0.271 lb·in²

Rated HP at 100 rpm

N/A 0.23 hp

Rated HP at 1,200 rpm

N/A 2.76 hp

Rated HP at 1,800 rpm

N/A 4.11 hp

Rated HP at 3,600 rpm

N/A 8.28 hp

Spider Performance

Spider Performance

  • Nitrile Butadiene (Buna N) Rubber is a flexible elastomer material that is oil resistant, resembles natural rubber in resilience and elasticity and operates effectively in temperature range of -40° to 212° F (-40° to 100° C). Good resistance to oil. Standard elastomer. (Also applies to SXB Cushions.)



  • Interchangeable with all hub sizes standard for the L-Line and AL-Line products
  • Available in a variety of different finished bore and keyway combinations
  • Finished bores passivated for additional rust protection



  • Lovejoy does not recommend reboring AL hubs.
  • All hubs are supplied standard with one set screw, except the AL150 which is provided with two set screws.