Mechanical Friction Torque Limiter Couplings

Overload Protection Between Two Supported Shafts With No Angular or Parallel Misalignment


  • Continuously engaged friction torque limiter slips when the torque setting is exceeded. Continues to slip until the overload ceases.
  • Each half of the assembly, (1) torque limiter mechanism and (2) the coupling/sleeve assembly, is attached to a fully supported shaft.
  • The tabs on the outside of the friction discs in the mechanism slide into the slots in the coupling/sleeve assembly, creating a connection for the transfer of rotary motion from one shaft to the other.
IMPORTANT: If precise alignment of the two shafts cannot be obtained, consider a Mach III flexible torque coupling model.


  • Momentary overload protection.
  • Torque limiters are not recommended in continuous slip or tension control applications. Consider a SensiFlex® tension control clutch or brake.
  • Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM.
Design Features
  • No reset is required after torque limiter slips.
  • The slip torque setting can be adjusted.
  • Both the torque limiter mechanism and coupling/sleeve assembly are bored and keyed to fit any shaft size up to the maximum shown (US & Metric).
Torque Limiter Mechanisms with Couplings
Torque Limiter Coupling
Repair Kits and Parts

View model-specific detail sheets below
for available kits and product codes.

Download Product ManualPrint Page


Visit Our Torque Limiter
Application and Use Guide
For Video and Diagrams Showing
How This Product Works


Product No. Maximum
Torque Setting
Maximum Bore with Standard Keyway
(Inches / Millimeters)
Length (Inches) Outside Diameter (Inches) Detail Sheet Request 3D CAD Model
V2G2R-STL 200 0.500 / 12 2.41 2.58 View PDF request
V3G2H-STL 792 1.000 / 24 4.06 3.50 View PDF request
V4G2H-STL 1,406 1.250 / 31 5.08 4.48 View PDF request
V5G2H-STL 2,736 1.438 / 38 6.09 5.69 View PDF request
V6G1G-STL 3,070 2.000 / 52 8.16 7.34 View PDF request
V6G2G-STL 6,140 2.000 / 52 8.87 7.34 View PDF request
V8G1K-STL 6,066 2.500 / 66 10.19 10.00 View PDF request
V8G2K-STL 12,132 2.500 / 66 11.09 10.00 View PDF request

Additional Information

Mach III friction torque limiters do not disengage upon overload. A means of sensing and stopping the overload condition must be in place or a friction torque limiter will continue to slip, eventually overheating to the point where it is unfit for continued use. See our Torque Limiter Application and Use Guide for more details.

Customization Options

Mach III provides customized torque limiter couplings for applications with unique requirements. Contact our engineering department with your specifications.

3D Model Request


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