CMT Bushing System versus Other Shaft Connection Systems

CMT Bushing System’s compact ‘tight fit’ design eliminates the expense and time lost due to shaft modification or extended hubs associated with older generation designs. CMT recognized the challenge of working with timing pulleys in small spaces and met it with the Concentric Maxi Torque.

CMT Bushing System

Virtually maintenance free, once in place, there are no further adjustments required because the Concentric Maxi Torque remains secure, thus eliminating any degree of shaft damage or eventual misalignment.  The Concentric Maxi Torque is small-space-precise.

How it works

Custom Machine and Tool Co., Inc. developed and patented the revolutionary hub-to-shaft connection device, the Concentric Maxi Torque, which allows for precise component positioning and tight runout control on demanding applications, while at the same time being simple to install and remove without shaft damage.

The revolutionary keyless hub-to-shaft connection device has superior features and benefits compared to other connection systems such as keyways, pins, set screws, clamp collars, and other tapered shaft locking devices.

CMT Bushing System vs. Other Shaft Connection Systems

Easiest and fastest system to assemble and disassemble

CMT Bushing System Benefits

Set Screws:  CMT has higher torque capacity, lower component run-out, better alignment, and no shaft distortion.

Keyways:  CMT has no movement under reversing conditions, maintains both axial and rotational position, and allows for phase control during assembly, increased shaft contact decreases run-out.

Pins:  CMT has higher torque capacity, decreased component run-out, and phase control during assembly, easier assembly/disassembly, and reusable.

Clamp Collars:  CMT requires less space, lower inertia, 360° uniform clamping pressure, lower cost, eliminates component wobble, multiple bore sizes per component.

Other Attachment Systems:  CMT requires less space, lower inertia, and lower cost, smaller outside diameter for minimum component size with maximum bore.

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About CMT

CMT offers the Guaranteed Shipment Program for timing pulley stock for 5 pieces and less shipped within 72 hours or we pay the UPS ground freight charges.* We provide first-class timing pulley stock in a variety of materials quicker than anyone else in the business. CMT also carries a complete line of matching flanges and timing belts to provide you with a one-stop solution.

For more information, visit or contact

Custom Machine & Tool Co., Inc.
301 Winter Street, Hanover, MA 02339 USA
P: ​(781) 924-1003 or (800) 355-5949
F: (781) 924-5154 or (800) 355-4490