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Hexact Linear Actuation Method
    The HLA adjustable pulley can be used in place of the standard “HM” pulley where an external mechanical control is available. Typical control methods include hydraulic cylinder, air cylinder, and lever. The adapter nut located on the end of the HLA pulley will accept a threaded rod or a clevis with cross pins. The actuator linkage must be on the center line of the pulley, but radial freedom is required to relieve loads caused by misalignment of the linkage. Actuation rate (closing the moveable flange) should not exceed 2-1/2 inches per minute.

    To specify the correct pulley, simply substitute the HLA prefix for the HM. For example, the Model HLA-7 pulley has the same drive characteristics as the Model HM-7 hand wheel-type pulley. Refer to the adjacent chart for dimensional information. A torque arm bracket is NOT required for the HLA drive.
Unit of Measure







N/A Adjustable Center - Driver

Belt Size

N/A 1922V


N/A 16.00 lb

UPC Number

N/A 42924

Dimensional Data

Bore Diameter 

N/A 1 in

Outside Diameter (Dimension A)

N/A 8.250 in

Belt Top Width (Dimension B)

N/A 1.180 in

Dimension C

N/A 0.630 in16 mm

Distance at Min. PD (Dimension D)

N/A 2.520 in

Bore Depth (Dimension E)

N/A 3.5 in

Max. Opening Distance (Dimension F)

N/A 8.370 in

Min. Opening Distance (Dimension G)

N/A 7.310 in

Thru Hole (Dimension H)

N/A 0.390 in

Distance Across Flats (Dimension I)

N/A 1.120 in

Nut Diameter (Dimension J)

N/A 1.180 in

Max. Thrust (Dimension K)

N/A 472.00 lb

Diameter (Dimension L)

N/A 3.000 in

Thread (Dimension M)

N/A 5/8-11 UNC

Max. Depth (Dimension N)

N/A 0.78 in Diameter x 1.12 in

Flat Length (Dimension P)

N/A 0.750 in

Dimension R

N/A 1.000 in25.40 mm

Max. Depth (Dimension S)

N/A 2.000 in

Cubic inches

N/A 569.68313 in³
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