The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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.
Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
HLA Pulley Actuation Recommendations
Unit of Measure
Items Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
68514442900
Hexadrive Series Model HLA-3 Adjustable Pulleys w/ Hexact Linear Actuation Method - Imperial 		Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
68514442901
Hexadrive Series Model HLA-3 Adjustable Pulleys w/ Hexact Linear Actuation Method - Imperial 		Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
68514442924
Hexadrive Series Model HLA-3 Adjustable Pulleys w/ Hexact Linear Actuation Method - Imperial 		Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
68514442925
Hexadrive Series Model HLA-3 Adjustable Pulleys w/ Hexact Linear Actuation Method - Imperial
Description  N/A HLA-3-3/4-PULLEY N/A HLA-3-7/8-PULLEY N/A HLA-3-1"-PULLEY N/A HLA-3-1-1/8-PULLEY
Bore Diameter  N/A 3/4 in N/A 7/8 in N/A 1 in N/A 1 1/8 in
Model N/A HLA-3
Type N/A Adjustable Center - Driver
Belt Size N/A 1922V
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
Weight N/A 16.00 lb
UPC Number N/A 42900 N/A 42901 N/A 42924 N/A 42925
Cubic inches N/A 569.68313 in³