Shaft Mounted Speed Reducers (SMSR)


Shaft Mounted Speed Reducers (SMSR)

The workhorse on many conveyors, Challenge’s range of metric SMSRs and imperial TXT units are fully interchangeable with other manufacturers and are supplied complete with a torque arm. The

Metric SMSR is available with the Grip-Loc hub system or standard output hubs with reducing bushes. The TXT unit is available with a full range of imperial output hub bushings. Backstops for both units are available and sold separately.

Consistent quality and close tolerances are guaranteed by Challenge’s production line manufacturing and all units are fully traceable via a unique serial number. Challenge gearboxes are test run for 30 minutes before final quality control and drained of oil before shipment.


Metric Range:

• Includes complete torque arm assembly

• Interchangeable with most other manufacturers

• Production line manufacturing guarantees tolerances and consistent quality.

• Gears produced on German manufactured hobbing centres to achieve the highest quality helical gear components.

• Pinions; 8620 steel

• Gears; 20MnCr5 steel

• All gears are ground

• Final heat treatment includes gas carburising to a

depth of 1mm, then grinding to DIN class 6.

• Castings crack tested

• All units test run prior to final quality control checks

• Full traceability guaranteed with unique Challenge serial number.

• Backstops also available to prevent reversing

• Drive ratios exceed 150:1 with a belt drive

• Double lipped oil seals used throughout

• Standard ball and cylindrical roller bearings used - in stock around the world

TXT Range:

  • Twin Tapered Output Hub
  • Precision High Quality Gearing
  • Power Ratings
  • Maximum Capacity Housing Design
  • Strong Alloy Steel Shafts
  • BackStops
  • Bearing and Oilseals
  • Torque Arm Assembly

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