AGMA Member CompanySince 1946East Walpole, MA
AGMA Member CompanySince 1946East Walpole, MA
Custom gears, sprockets and machined power-transmission components for heavy construction machinery OEMs and service fleets.
Commercial Gear combines specialized gear cutting, CNC machining and rigorous inspection to support new components, replacement parts and maintenance projects in excavators, loaders, bulldozers, cranes and other construction equipment.
High-quality parts that keep heavy equipment running longer.
Construction equipment is built for tough service lifetimes, but critical gears and sprockets eventually wear out or become obsolete. Commercial Gear works with OEMs and maintenance teams to produce replacement gears, sprockets and related components to exact specifications. This ensures heavy machinery downtime is minimized when original parts are no longer available.
For instance, Commercial Gear can manufacture a replacement final-drive pinion for an excavator’s swing mechanism or a custom sprocket for a bulldozer undercarriage, matching your original equipment’s drawings. Projects can start with a customer-supplied blank or an existing component, combining CNC turning/milling with specialized gear cutting and secondary machining to deliver the complete part.
Inspection plays a key role in MRO projects. Commercial Gear’s dedicated gear inspection lab evaluates profile, lead, runout and composite to identify manufacturing or wear issues. This detailed inspection helps ensure replacement gears meet the required geometry before production, solving subtle fit problems and improving equipment performance.
Construction equipment projects can involve new production parts, hard-to-find replacements or routine maintenance components. Commercial Gear brings gear manufacturing, machining and inspection together under one roof to meet these needs for bulldozers, excavators, loaders and more.
Manufacturing solutions for new builds, maintenance schedules and replacement parts.
Custom manufacturing when OEM or standard parts are unavailable or outdated.
Manufacturing of spur, helical, bevel & miter, worm and internal gears to customer drawings and specifications.
Specialized equipment for evaluating gear geometry and dimensional characteristics (profile, lead, runout, composite variation).
Turning and milling for bores, shafts, hubs, keyways and other component features on gear blanks.
Custom sprocket manufacturing plus machining modifications (reboring, keyways, drilling) for chain drives and track systems.
Support for one-off prototypes, replacement runs and full production volumes.
Commercial Gear has manufactured custom gearing and power-transmission components since 1946.
Commercial Gear manufactures custom gears and related power-transmission components for construction machinery, supported by CNC machining and thorough inspection.
Custom spur, helical, bevel & miter, worm and internal gears are manufactured to customer drawings and specifications. For example, we produce replacement final-drive pinions for excavators, ring gears for crawler loaders, and precision timing gears for on-board equipment. Specialized gear cutting can be combined with CNC machining and gear inspection to deliver a complete, ready-to-install component.
Custom sprockets for track drives, conveyor systems and winches — plus modification of appropriate stock sprockets — are available. Operations include reboring, keyway cutting, drilling and other machining needed to fit your application. Whether you need a one-off drive sprocket for a bulldozer or short-run replacement for a construction conveyor, Commercial Gear can supply it.
Internal and external splines, spline shafts, rack gearing and related machined components for heavy equipment transmissions and powertrain systems. Commercial Gear produces spline shafts and gears used in hydraulic drives, steering units, gearboxes and final drives. These components are made to your specifications with tight tolerances and AGMA-aligned quality practices.
Start with the part you need or explore the manufacturing capabilities used to produce, modify and inspect custom gears and power-transmission parts.
Explore the processes available to support custom and replacement part manufacturing.
Explore Commercial Gear’s product lines and power-transmission components for heavy machinery.
The gear cutting, CNC machining and inspection capabilities used for construction equipment also support OEM and MRO needs across other demanding markets.
Common questions about custom gears, replacement parts, sprockets and machining for construction equipment projects.
Yes. Commercial Gear supports OEM and MRO projects by manufacturing gears and related components to customer drawings and specifications. Work can range from single-part replacements to full production runs. Projects can begin with a customer-supplied blank or an existing component, adding required gear cutting and machining to deliver an accurate replacement.
Commercial Gear manufactures spur, helical, bevel & miter, worm and internal gears, along with other power-transmission components. The appropriate manufacturing method depends on the gear geometry, pitch, size and material specified in your drawings. We can produce specialized gears used in heavy-duty drives, such as large final-drive pinions and high-torque worms.
Yes. CNC turning and milling can be integrated with gear cutting to produce bores, shafts, hubs, keyways, drilled holes and other features in one component. This allows more of the part to be completed in-house, ensuring consistent geometry and reducing the number of subcontractors.
Yes. Commercial Gear maintains dedicated gear inspection equipment for evaluating characteristics like profile, lead, composite variation and runout. Inspection can identify whether gear geometry or wear is causing issues (for example, improper fit or vibration). Providing inspection data can help diagnose problems before making replacement parts.
Yes. Commercial Gear produces custom sprockets to your specifications and can modify appropriate stock sprockets (reboring, keyway machining, drilling) for heavy equipment drives. Commercial Gear is also a longtime U.S. Tsubaki distributor, offering stock and custom sprockets for chain-driven systems.
Send the available drawing or CAD file along with component details: gear or sprocket specifications (pitch, tooth count, hub/bore dimensions), material, quantity, tolerances, and any required surface treatments or inspection steps. Include information about the mating components (e.g. pinion gears, shafts or chains) when relevant, as well as any gear quality requirements or issues you’re trying to solve.
Explore technical articles covering custom gear manufacturing, inspection, replacement components and sourcing strategies for heavy machinery.
