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 HLA-30 1-3/8 PULLEY


N/A HLA-30


N/A Adjustable Center - Driver

Belt Size

N/A 4430V


N/A 46.00 lb

UPC Number

N/A 42927

Dimensional Data

Bore Diameter 

N/A 1 3/8 in

Outside Diameter (Dimension A)

N/A 12.500 in

Belt Top Width (Dimension B)

N/A 2.750 in

Dimension C

N/A 0.780 in19.81 mm

Distance at Min. PD (Dimension D)

N/A 5.190 in

Bore Depth (Dimension E)

N/A 7.500 in

Max. Opening Distance (Dimension F)

N/A 12.830 in

Min. Opening Distance (Dimension G)

N/A 10.810 in

Thru Hole (Dimension H)

N/A 0.390 in

Distance Across Flats (Dimension I)

N/A 1.480 in

Nut Diameter (Dimension J)

N/A 1.570 in

Max. Thrust (Dimension K)

N/A 1015.00 lb

Diameter (Dimension L)

N/A 4.500 in

Thread (Dimension M)

N/A 3/4-10 UNC

Max. Depth (Dimension N)

N/A 0.87 in Diameter x 1.62 in

Flat Length (Dimension P)

N/A 1.000 in

Dimension R

N/A 1.120 in28.45 mm

Max. Depth (Dimension S)

N/A 3.000 in

Cubic inches

N/A 2004.68750 in³