Menu
Find Your Nearest Timken Sales Office or Authorized Distributor

Our locator tool helps you connect with the right Timken partner quickly. Registered users
can save their nearest Timken Sales office or distributor in their dashboard.

Try the Locator Tool
Analyze Bearing Performance in an Application with Timken ® Syber ® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

Learn More
Explore Timken Engineering Tools
Videos on YouTube

Check out our Engineering Tools video playlist on YouTube. These short walkthroughs
help you navigate Timken calculation tools, selection guides and digital resources.

View the Full Playlist
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
  • Hexadrive HLA Series Adjustable Pulleys w/ Hexact Linear Actuation Method
  • HLA Pulley Actuation Recommendations
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.
1 - 4 of 4 | Results Per Page | View | Unit of Measure
1 
Request Information Compare Items

Part Number

Description 

Bore Diameter 

Type

Outside Diameter

Overall Length

Belt Top Width (Dimension B)

Bore Depth (Dimension E)

N/A HLA-3-3/4-PULLEY N/A 3/4 in N/A Adjustable Center - Driver N/A 8.250 in N/A 8.370 in N/A 1.180 in N/A 3.5 in
N/A HLA-3-7/8-PULLEY N/A 7/8 in N/A Adjustable Center - Driver N/A 8.250 in N/A 8.370 in N/A 1.180 in N/A 3.5 in
N/A HLA-3-1"-PULLEY N/A 1 in N/A Adjustable Center - Driver N/A 8.250 in N/A 8.370 in N/A 1.180 in N/A 3.5 in
N/A HLA-3-1-1/8-PULLEY N/A 1 1/8 in N/A Adjustable Center - Driver N/A 8.250 in N/A 8.370 in N/A 1.180 in N/A 3.5 in
1 - 4 of 4 | Results Per Page | View | Unit of Measure
1