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Product/Service Catalog

The Concentric Maxi Torque Keyless Bushing Connection System

Custom Machine and Tool Co. Inc.

Twelve sizes cover bores from inches 0.1250 (3mm) to 1.1875 inches (30mm) and torque capacities from 14 in-lbs (4Nm) to 2795 in-lbs (375Nm).

Innovative.   The Concentric Maxi Torque system is a keyless hub to shaft connection designed and developed specifically to suit the needs of small shafts and drive components in the power transmission and motion control markets.  This patented system enables customers to easily phase, install, adjust and remove drive components, all while offering precise component positioning.

Concentric.  With radial runout less than .001/.26mm as assembled, the Concentric Maxi Torque system enables customers to attain higher drive speeds, reduce unwanted vibration and maintains concentricity.

Reliable.  The mechanical shrink provides torque capacity which far exceeds that of two setscrews arranged perpendicular to the shaft, offering the most reliable connection in the industry.

Economical.  The compact design eliminates the need for the extended hubs used to accommodate setscrews, allowing motion systems engineers to design drives which are lighter and use less space.  Additionally, the shaft damage and added expense of shaft modification often associated with the use of setscrews or pins is eliminated.

CMT maintains inventory offering same day shipping for timing pulleys with the Concentric Maxi Torque bushing system.  

Custom Machine & Tool Co., Inc. has been a US manufacturer of precision timing pulleys, drive systems and components for the motion control and power transmission markets since 1964.  In addition to the Concentric Maxi Torque connection system, our product offering contains all types of popular timing pulley tooth designs including:

  • Trapezoidal Profiles: 40 DP (.0816"), MXL (.080"), XL (.200") L (.375") and H (.500")
  • HTD metric curvilinear profiles: 3MM, 5MM, 8MM, 14MM
  • Gates PowerGrip® GT®2 (PGGT) Profiles: 2MM, 3MM, 5MM, 8MM
  • Goodyear SuperTorque Pd®: 3MM, 5MM, 8MM
  • Gates Poly Chain® GT®2 (PGGT): 8MM
  • Metric Profiles: T2.5, T5, T10, T20 
  • AT Metric Profiles: AT3, AT5, AT10, AT20 
  • Gears up to AGMA Quality 8,  8-64 DP, .5-2 MOD
  • Various Sprockets - #25 to #60 Chain


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