• "Connect with the Best"

    Concentric Maxi Torque
    Keyless Hub-to-Shaft Connection System

What our customers are saying.

 

"Thanks for the confirmation and mentioning the in-stock availability.  My needs work well with your release date so let's keep it simple and have one shipment.  Also, thank you for your prompt responses.  Nice service."

 

Installation/Service Technician - US based manufacturer of generic case and bag printers.

 

 

bushing

WHAT IS THE CONCENTRIC MAXI TORQUE?

  • CMT is a revolutionary keyless tapered bushing & shaft-to-hub connection system.  

  • Developed initially for the synchronous drives market.

  • Designed and patented by Custom Machine & Tool Co., Inc.

 

WHY CUSTOM MACHINE & TOOL CO., INC. DEVELOPED THE CMT BUSHING SYSTEM

Custom Machine & Tool Co., Inc, through 40 years of design and application experience in the synchronous drives market, saw a need for a technologically improved hub-to-shaft connection system.

  • As machine speeds and indexing requirements continue to increase reduction in inertia and vibration becomes important.
  • Synchronous timing belts and system components will last longer, go faster and be more accurate when tension excursion is minimized through better run-out control.
  • Component alignment and run-out are more critical at higher speeds.
  • There was not a high quality compact bushing system available for shaft sizes under 1” diameter.
  • Most connection systems require extra component mass to make the connection.
  • Second and third generation synchronous timing belts are capable of production higher torques requiring stronger shaft connections.
keyless bushing
stress on concentric maxi torque

 

CMT TECHNOLOGY

CMT is a unique bushing attachment system: a single set screw locks the low-taper-angle split bushing in place and eliminates all of the existing attachment issues.

  • Bushing system is engineered to assure full surface contact and even clamping pressure with a single set screw.
  • Set screw size optimized to provide holding torque in line with shaft diameters and component torques
  • Developed using mathematical and FEA modeling.
  • Scalable to any shaft/bore size requirement.
  • Lower inertia and better shaft-to-component balance.
  • System design assures near perfect hub-to-shaft concentricity when assembled.

 

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, no shaft distortion.

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

Pins:  CMT has higher torque capacity, decreased component run-out, phase control during assembly, easier assembly/disassembly, 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, lower cost, smaller outside diameter for minimum component size with maximum bore.

set screw clamp collar pins
small timing pulleys

 

CMT PRODUCT FAMILY

Custom Machine & Tool Co., Inc. has developed its CMT bushing system, through scalable technology, to meet a wide variety of popular, as well as custom, hub-to-shaft combinations.

  • Imperial & metric bore size coverage from .125” to 1.1875” and 3mm to 30mm
  • Torque capacities from 14 in-lbs (1.5Nm) to 2,795 in-lbs (315 Nm)
  • Multiple bore size offerings per bushing size allowing for maximum mix & match flexibility with minimum components
  • Withstands repeated assembly and disassembly with no shaft damage and without a reduction in torque capacity
  • Flexible positioning accuracy provides easy phase adjustment

 

CMT BUSHING SYSTEM APPLICATIONS

Custom Machine & Tool Co., Inc., an innovative designer and market leader, can apply the CMT bushing system in solving your most demanding hi-tech synchronous drive and rotating component problems.

  • High speed indexing and reversing in systems using timing belt pulleys and gears
  • Systems requiring a high level of component rotational positioning accuracy and precise run-out control
  • Designs where reduced inertia and low vibration are desired
  • Components required to be assembled and disassembled multiple times during their life
  • Rotating mechanisms requiring compact space
  • Devices requiring high reliability with minimal maintenance
keyless bushings timing pulley
custom timing pulleys

 

CMT BUSHING SYSTEM PRODUCT OFFERING AND CUSTOM SOLUTIONS

We do it all in small to mid-sized timing pulley applications. Our manufacturing capabilities provide flexibility and low total cost solutions. We are specialists in product customization.

Timing Belt Pulleys

  • MXL (.080”), XL (.200”), L (.375”), H (.500”)
  • 3mm, 5mm, 8mm HTD® Profile
  • 2mm, 3mm, 5mm, 8mm PGGT® Profile
  • T2.5, T5, T10
  • AT3, AT5, AT10
  • 40DP (.0816”)
  • Zero Backlash

Custom Products

  • Idler Pulleys
  • Round Belt Pulleys
  • Feed Rollers
  • Spur Gears
  • Poly-V Pulleys
  • Sprockets

 

WHERE CAN THE CMT BUSHING SYSTEM HELP YOU?

  • Component Alignment and Timing
  • Reversing Problems
  • Inertia and Space
  • Vibration Issues

 

CONCENTRIC MAXI TORQUE

A Technically Superior Solution

  • Quicker assembly than other systems
  • Higher holding reliability – lower maintenance
  • Improved shaft-to-hub concentricity – less run-out
  • Multiple bore sizes available per bushing size
  • Reduced inertia for increased power savings
  • Compact design fits in tighter spaces
  • Cost competitive with all other attachment systems

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