Build-to-Print Gear & Shaft Manufacturer Since 1945

Tracey Gear & Precision Shaft manufactures custom gears, splines, and precision shafts to customer engineering drawings. We are a family-owned, ISO 9001:2015 certified job shop in Pawtucket, Rhode Island, producing parts in small to medium production runs, 100% in the USA, since 1945.

Before You Request a Quote

We are a build-to-print manufacturer. To quote your part, we need a complete engineering drawing that includes:

• Geometry, dimensions, and tolerances
• Full gear, spline, or thread data
• Material and any heat treatment
• Surface finish requirements
• Any additional processes (plating, coating, etc.)
• Quantity

What we do not do:

• Reverse engineer parts or work from samples
• Design parts or provide design engineering
• Recommend or select materials
• Repair or service equipment
• Sell directly to the military (we supply military suppliers)

For Union Gear & Sprocket and equivalent catalog parts, a catalog part number plus your written modifications is all we need to quote.

Learn more about our process.

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Capabilities at a Glance

• Spur and helical gears: up to 36″ diameter and 12″ face width, 3 to 48 DP or 0.5 to 8 module, up to AGMA Q11, helix angles up to 50°
• Straight and angular bevel gears: up to 14″ diameter, 3 to 24 DP, cut as matched sets on Gleason generators
• Worms and worm gears: worms thread milled or ground up to 6″ diameter and 39″ between centers, worm gears hobbed up to 36″ diameter
• Planetary gears: sun and planet gears, plus internal spur ring gears up to 16″ pitch diameter
• Splines: inch and metric involute, straight-sided, and serrations to ANSI B92.1, ANSI B92.2M, ASA B5.15, DIN 5480, and DIN 5482
• Precision shafts: ground up to 72″ between centers or 10″ in diameter, to 0.0003″ total tolerance and 8 µin Ra
• Thread grinding: worms, worm shafts, ACME threads, and threaded shafts
• Finished parts on one purchase order: we manage heat treating, plating, passivation, and balancing through qualified vendors, with certifications provided when required

Our Manufacturing Services

CNC Gear Cutting

We hob and shape spur gears, helical gears, splines, sprockets, and timing belt pulleys from 3 to 48 DP and 0.5 to 8 module, up to AGMA Q11. We generate straight and angular bevel gears up to 14″ in diameter on Gleason straight bevel generators.

CNC Thread Grinding

We grind worms, worm shafts, ACME threads including multiple-start threads, and precision threaded shafts in hardened and unhardened steels.

CNC Grinding

We perform surface, OD (cylindrical), and ID grinding and honing, holding ground diameters to 0.0003″ total tolerance with finishes down to 8 µin Ra.

CNC Turning & Milling

We produce gear blanks, shafts, hubs, and bores on CNC lathes and vertical machining centers, completing multiple operations in one setup where possible.

Broaching

We broach keyways from 3/16″ to 1-3/4″, involute and straight-sided internal splines, squares, and hexes. When broaching is not practical, we produce internal features by shaping or EDM.

Why Tracey Gear & Precision Shaft

Leo F. Tracey started Tracey Gear in a one-car garage in 1945. In 1973 his sons Stephen, Richard, and Kevin took over the business and grew it into the shop it is today. In 2023, Doug Tracey became owner, bringing the company into its third generation of family ownership. More than 80 years later, Tracey Gear & Precision Shaft is still family-owned and still focused on one thing: manufacturing precision gears and shafts exactly to our customers’ prints.

• Family-owned and operated since 1945, now in its third generation
• ISO 9001:2015 certified
• 100% made in the USA, in Pawtucket, Rhode Island
• Small to medium production runs
• Gear cutting, grinding, thread grinding, turning, milling, and broaching under one roof

Common Questions

Can you make a part from a sample?

No. We do not reverse engineer parts or work from samples. We require a complete engineering drawing.

Can you help design my gear or choose a material?

No. We are a build-to-print manufacturer. Design and material selection must come from your engineering team and be shown on the drawing.

What lot sizes do you run?

We specialize in small to medium production runs.

Do you work directly for the military?

No. We supply military and defense contractors, not government agencies directly.

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