Centrifugal Clutch For Military Defense

Centrifugal Clutch For Military Defense

BLM Automatic Clutch partnered with an engineering firm contracted by the U.S. Military to manufacture the 6″, F60H clutch highlighted here

It was designed for use on a 21 horsepower, 3600 RPM/1500 Idle chiller. BLM was responsible for all of the required work, which included the material sourcing and precision manufacturing. BLM’s solution was chosen by this engineering firm as the best fit for their design as it exhibited maximum drive capability in a limited work space.

State-of-the-art CNC lathes, milling machinery, and finishing equipment were utilized to mill and turn gray iron to the required profile, holding a tight ± 0.003″ tolerance throughout. The unit was assembled, and subjected to a parkerizing phosphate plating process for corrosion and wear resistance, leaving the part with a black finish. 800 units were produced in a 6 month period and shipped to the customer.

BLM is a recognized leader in the manufacturing of centrifugal clutches for demanding applications, able to meet rigorous specifications. All products are fully dimensionally inspected and are held to the highest industry standards.

For more information about this custom centrifugal clutch project, or other unique application capabilities, please see the table below or contact BLM directly.

Highlights of this Custom Clutch Machining Project

Project Scope

Worked with an engineering firm contracted by the US military. The BLM clutch was sourced by the firm as the best solution for their design. The belt style used was a timing pulley used for a space limitation with a maximum drive capability.

Product Application

Chiller 21 HP/3600 RPM/1500 IDLE

Product Description

6″ Clutch F60H

Clutch Fabrication Capabilities Applied/Processes


  • Material Sourcing
  • CNC Turning
  • CNC Milling


  • Assembly Plating


Modification of appropriate drawing from portfolio of 4000+ drawings to military specs

Equipment Used to Manufacture Part

CNC Lathes, CNC Mills, Various Machine Shop Equipment

Equipment Used to Manufacture Part

CNC Lathes, CNC Mills, Various Machine Shop Equipment

Tightest Tolerances

± 0.003″

Material Used

Gray Iron

Material Finish

Parkerizing Plating
Color: Black

In process testing/inspection performed

Dimensional Inspection


800 Units

Delivery/Turnaround Time

6 Months

Delivery Location


Product Name

Centrifugal Clutch