Gearing and Gearboxes

IMS has both the manufacturing capabilities and the engineering expertise to design and build custom gearing and gearboxes. We can hob both helical and spur gears up to 72” in diameter and have an M&M inspection machine that will verify all gear geometry meets AGMA requirements. IMS engineering is active on AGMA technical committees and has many years of experience in the design, evaluation, and reverse engineering of all types of gearing. IMS has designed and manufactured custom replacement helical reducers for steel mill service, large wormgear reducers for hydro-electric applications, travel drive reducers for the nuclear industry, and many other unique and challenging projects.


IMS Standard Gearbox Typical Design Features

  • Designed in accordance with CMAA 70
  • Parallel shaft reducer designed specifically for use in hoist and crane applications
  • Housing is horizontally split, steel fabricated, stress‐relieved, machined, foot mounted with over‐sized inspection covers
  • Shafting is through hardened alloy steel
  • All helical gearing using normal diametral pitch sizes, full fillet tooth roots, 25 degree pressure angle, made from through hardened alloy steel
  • Self-aligning, double-row spherical roller bearings
  • Ductile iron bearing capsules that encapsulate the bearing
  • Taconite style seals (double seals) on input and output running against a carburized and ground seal sleeve
  • Standard lubrication is ISO VG320, special performance lubrication is synthetic
  • All IMS reducers come equipped with site glasses, drain valves, and breathers

Rebuild and Redesign Capabilities

  • In house engineering with many years of gear design experience
  • Active members of the American Gear Manufacturer’s Association (AGMA), including involvement with various AGMA technical committees
  • Services available include gearing related failure analysis, inspection, capacity evaluations, and upgrade studies
  • Experience with helical, spur, worm, bevel gearing, housing and shaft design, bearing selection
  • Old gearboxes can be rebuilt to match the existing design using a combination of existing components and new components
  • Old gearboxes can be rebuilt/redesigned using an existing housing and replacing all old gearing with newly designed and upgraded gearing, shafting, and bearings
  • Old gearboxes can be completely replaced with a drop-in unit that typically includes a newly designed set of gears, shafts, and bearings that improves the gearboxes overall capacity