Commercial Gear · East Walpole, Massachusetts
Powering industry with precision gear and sprocket solutions
Gears cut to your print, on the right machine
Full CNC turning and machining under one roof
Inspected to your drawing, AGMA-based
For nearly 80 years, Commercial Gear and Sprocket Company has been the trusted partner for custom gear manufacturing — combining decades of experience with a commitment to precision.
Precision Engineered
For performance that lasts
Every Tooth Form
Hobbing, shaping, bevel & thread milling
One Shop, Start to Finish
Secondary ops without a second vendor
Verified, Not Assumed
Calibrated lead, profile & composite testing
Custom gears cut to your print
80+
Years in business
Family owned since 1946
3rd
Generation
Family owned and operated
120+
Years combined experience
Across our machinists and inspectors
9
Product families
Gears, sprockets, splines and more
80+
Years in business
Family owned since 1946
3rd
Generation
Family owned and operated
120+
Years combined experience
Across our machinists and inspectors
9
Product families
Gears, sprockets, splines and more
Our customers, from global OEMs to specialized machine builders, rely on us for more than just parts; they depend on our expertise to keep their operations moving. That is why we are dedicated to manufacturing solutions that offer unmatched reliability and quality, ensuring your equipment functions flawlessly.
Whether your project requires custom-cut helical gears, precision-ground spur gears, or specialized sprockets and shafts, our comprehensive manufacturing capabilities let us handle any challenge — working from your blanks or managing the process start to finish.
What we make
Gears and Gear Related Products
Nine product families, cut to your print and inspected before they leave the building.
Bevel and Mitre Gears
Bevel and miter gears up to 24" diameter, cut on Gleason generating equipment and inspected on calibrated Gleason checkers.
Helical Gears
Helical gears to 16" diameter x 36" face, generated and inspected against lead and profile on calibrated Fellows equipment.
Rack and Pinion
Custom rack and pinion sets cut in cast iron and steel for machine tool, transit and material handling applications.
Ratchets and Jaw Clutches
Ratchets to 30" diameter and jaw clutches to 24" diameter, cut on Whiton milling equipment with face gear attachments.
Splines
Internal and external involute and straight-sided splines in American National Standard, metric DIN and SAE serration forms.
Sprockets
Custom sprockets up to 36" diameter and 2" pitch, cut to print for conveyor, transit and heavy industrial drives.
Spur Gears
Spur gears up to 36" diameter x 36" face, from 96 D.P. to 2 D.P., hobbed and shaped to your print.
Timing/Gear Belt Pulleys
Timing and gear belt pulleys cut to your print for indexing, positioning and synchronous drive applications.
Worm Gears
Worm gears up to 16" diameter, plus worms and lead screws to 12" diameter in any lead, hobbed and thread milled.
Why choose us
Built on precision, proven over generations
The reasons customers keep coming back — and send us the parts nobody else can make.
Made to your print
Every part is cut to your drawing, not to a catalog. Tooth form, pitch and material are what you specify — we don't approximate a dimension the drawing defines.
Verified quality
We inspect profile, lead and composite error on calibrated instruments, to the AGMA Inspection Manual 2000-A88. Quality is measured, not assumed.
Deep experience
Over 120 years of combined industry experience across the shop, some machinists with more than 30 years on the equipment.
Prototype to production
A single prototype, a short run or a repeating production order — quoted and cut on the same equipment, so quality carries across the volume.
We solve hard problems
Obsolete parts reverse-engineered from a sample, legacy drawings reproduced, and problem gears troubleshot — including parts made elsewhere.
On-time delivery
A perfect part that arrives late has failed the job. Expedient delivery is built into how the shop is run.
Made to your print
Every part is cut to your drawing, not to a catalog. Tooth form, pitch and material are what you specify — we don't approximate a dimension the drawing defines.
Verified quality
We inspect profile, lead and composite error on calibrated instruments, to the AGMA Inspection Manual 2000-A88. Quality is measured, not assumed.
Deep experience
Over 120 years of combined industry experience across the shop, some machinists with more than 30 years on the equipment.
Prototype to production
A single prototype, a short run or a repeating production order — quoted and cut on the same equipment, so quality carries across the volume.
We solve hard problems
Obsolete parts reverse-engineered from a sample, legacy drawings reproduced, and problem gears troubleshot — including parts made elsewhere.
On-time delivery
A perfect part that arrives late has failed the job. Expedient delivery is built into how the shop is run.
Have a drawing ready? Get a quote in motion today.
Fast, accurate quotes from a shop that has been cutting gears to print since 1946.
Capabilities
How we build them
Custom Gear Cutting
Gear shaping, hobbing, bevel gear generating, thread milling and gear milling — hobbing from 1/4" to 60" and shaping from 1/8" to 36" diameter.
Custom Machining & Fabrication
Custom gears, gear assemblies and sprocket products made to your exact specifications on CNC lathes, mills and manual tool room equipment.
Quality Inspection
Examine and resolve problems with gears, sprockets, chains and gear units, on calibrated ITW, Fellows, Gleason and Brown & Sharpe inspection equipment.
Designer & Engineer Resources
Reference tables and formulas for spur gears, helical gears, worm gears, splines and serrations — plus design support by phone.
Stock Sprockets & Chains
Distributor of U.S. Tsubaki power transmission sprockets and chains, with in-house re-machining of any UST part.
Who we serve
Industries we serve
From global OEMs to specialized machine builders — and the parts nobody else still makes.
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Original Equipment Manufacturers
Made-to-print gears and gear assemblies for OEMs who need a dependable partner in their supply chain.
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Machine Tool Builders
Precision gearing for the machines that build everything else — where accuracy in the gear train is non-negotiable.
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Construction Equipment
Heavy-duty gears and sprockets for equipment that has to keep working in the field.
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Mining
Rugged power-transmission gearing and sprockets for one of the most demanding operating environments there is.
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Power Hand Tools
Small, accurate gearing for compact, high-speed power tool drives.
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Medical Equipment
Precise, quiet-running gearing for medical and laboratory devices built to an exact print.
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Defense
Made-to-print gearing for defense suppliers, cut and inspected to the drawing.
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Mass Transit
Durable gearing and sprockets for transit systems that run long hours, every day.
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Rail Cars & Track Equipment
Heavy, hard-working gearing for rail cars and track maintenance equipment.
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How we work
The process we follow
From your first inquiry to the day the parts ship — every step with quality built in.
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01
Inquiry & Quote
Send a print, a sample or a description. We come back with a fast, accurate quote.
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02
Drawing Review
Our engineers read the drawing the way it will be inspected.
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03
Material & Planning
Material sourced to spec and the routing planned across the shop.
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04
Gear Cutting
Cut on the right machine — shaping, hobbing, bevel generating or thread milling.
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05
Secondary Ops
Turning, milling, deburring and finishing on CNC and manual equipment.
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06
Inspection
Verified against your drawing on calibrated, AGMA-based instruments.
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07
Delivery
Shipped when you need it — prototype through production.
No drawing? No problem.
Send a print, a sample, or just describe the part
We reverse-engineer parts from a sample every day. Whatever you have, we'll work back to the right tooth form and get you a quote.
Inspection floor
Quality criteria
Measured, not assumed
Every part is verified against your drawing before it leaves the building. Here is what that means in practice.
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AGMA-based inspection
Our quality program is based on the AGMA Inspection Manual 2000-A88.
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Calibrated instruments
Profile, lead and composite error measured on ITW, Fellows, Gleason and Brown & Sharpe equipment.
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AGMA member company
A member company of the American Gear Manufacturers Association.
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Verified against your drawing
The tooth form is confirmed against the supplied print before the part ships.
AGMA Member Company
Certifications & standards
Credentials our customers can count on
- AGMA Member Company — Commercial Gear & Sprocket is a member company of the AGMA, the standards body for the gear industry.
- AGMA Inspection Manual 2000-A88 — Our Quality Control Department bases its inspection on AGMA Inspection Manual 2000-A88.
Precision you can prove
Every part inspected before it leaves the building
AGMA-based inspection on calibrated instruments — because a gear you can't verify is a gamble you shouldn't have to take.
From the blog
Gear engineering, explained
Practical guidance for the people who buy and design gears.
How to Read a Gear Drawing Before You Send an RFQ
The handful of callouts a gear shop needs to quote your part accurately — and how to spot what's missing before it slows your quote down.
Spur vs. Helical Gears: Which One Does Your Job Need?
A plain-language comparison of the two most common gear types — how they differ, where each one wins, and how to choose for your application.
What an AGMA Quality Class Actually Means for Your Part
Gear quality isn't one number. Here's what AGMA classes describe, why a higher class isn't always better, and how to specify the right one.
What customers say
Trusted on the hard jobs
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Frequently asked
- What types of gears do you make?
- We're a custom gear manufacturer producing spur, helical, bevel and mitre, and worm gears, plus sprockets, splines, racks and timing pulleys — all cut to your print. We also distribute and re-machine U.S. Tsubaki stock sprockets and chain.
- How large a gear can you cut?
- Our cutting capacity is hobbing from 1/4" to 60", shaping from 1/8" to 36" diameter, and bevel gearing from 1/4" to 24" diameter. If your part is near those limits, send the print and we'll confirm the fit.
- Can you make a part if I don't have a drawing?
- Often, yes. We reverse-engineer parts from a sample regularly — send us the worn or broken part and we'll work back to the correct tooth form and dimensions. A clear sketch with the mating dimensions can also be enough to get started.
- What materials do you work with?
- We cut gears to your print across a wide range of materials, and we offer many sources for heat treating and metal finishes. Tell us the material and specification on your drawing and we'll confirm it.
- How do you inspect quality?
- Our Quality Control Department bases its inspection on the AGMA Inspection Manual 2000-A88. We measure profile, lead and composite error on calibrated ITW, Fellows, Gleason and Brown & Sharpe instruments, verifying the tooth form against your drawing. Commercial Gear is a member company of the AGMA.
- Do you handle prototype and low-volume work, or only production runs?
- Both. We produce everything from a single prototype to a repeating production run on the same equipment. Tell us the quantity and we'll quote the job you actually have.
- Can you troubleshoot a gear that keeps failing?
- Yes. Troubleshooting difficult gear problems is part of what we do, including parts made elsewhere. With over 120 years of combined industry experience, our people can evaluate the data and offer a corrective plan of action rather than just cutting another one.
- How do I get a quote?
- Send us your print, CAD file or a sample, along with the material, quantity and when you need it, and we'll price it. Use the quote form, email info@commercialgear.com, or for an urgent requirement call 800.491.1073.
Let us solve your gear challenge
Partner with a third-generation gear shop that keeps your operations moving. Send us your specifications and we'll take it from there.