Morse Taper Input Mechanical Friction Torque Coupling

Prevent Overtightening

  • Coupling transmits torque continuously but torque output does not exceed the slip torque setting.
  • No reset is required after coupling slips.
  • Slip torque can be set by Mach III, or can be set and adjusted by the user.
  •  Click here for an illustration detailing how a mechanical friction torque limiter works.
  • Torque limiter connects to #3 Morse taper socket
  • Output couplings available for a variety of connections; shafts, nuts, and components
  • Optional torque adjustment arbor available upon request
  • Opening and closing gate valves, butterfly valves, ball valves, plug valves, mud valves, etc. using a drill with a #3 morse taper socket. 
  • Water treatment and water distribution systems
  • Maximum RPM varies by model. Please consult the detail sheets (below). Consult engineering if the intended application exceeds the listed maximum RPM
  • Not recommended in continuous slip or tension control applications.                                               
Morse Taper Input Torque Limiter

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torque limiter coupling cut-a-way


Order the base unit plus one or more of the interchangeable steel and aluminum couplings.
Optional factory setting of the slip-torque value is available.

Product No. Maximum
Torque Setting
Input Length (Inches) Outside Diameter (Inches) Detail Sheet Request 3D CAD Model
T4X2R-STH 2796 #3 Morse Taper 6.90 4.48 View PDF request


Output Product No. Request 3D CAD Model
0.750 Inch Square COUPL-029 request
0.750 Inch Bore with Standard Keyway COUPL-030 request
1.000 Inch Square COUPL-045 request
1.000 Inch Bore with Standard Keyway COUPL-031 request
1.1875 Inch Bore with Standard Keyway COUPL-043 request
1.250 Inch Bore with Standard Keyway COUPL-040 request
1.375 Inch “D” Shaft COUPL-053 request
2.000 Inch Square (Fits AWWA 2 Inch Operating Nut) COUPL-032 request
2.250 Inch Square COUPL-057 request
2.500 Inch Square COUPL-026 request


Output Product No. Request 3D CAD Model
2.000 Inch Square (Fits AWWA 2 Inch Operating Nut) COUPL-058 request
2.250 Inch Square COUPL-056 request

3D Model Request


Model Type: