Internal Keyway Machining Services for Precision-Fit Components
Need a precise internal keyway cut in a shaft, gear, or coupling? At Keyseaters.com, we specialize in internal keyway machining services using dedicated vertical keyseaters built for tight-tolerance work.
Whether you’re machining hardened materials or dealing with complex blind bores, our keyseating process delivers repeatable, high-precision results—without the tooling costs of broaching or the limitations of EDM.
Experts in Machining Internal Keyways
Internal keyways present unique challenges: limited access, strict tolerances, and material hardness. Our equipment is purpose-built for this exact task.
Keyway widths: 1/8” to 1.5”
Bore diameters: Up to 24” OD
Depths: Up to 6”
Material capabilities:
Carbon steels (1018, 1045)
Stainless (304, 316, 17-4)
Tool steels (A2, D2, H13)
Aluminum, bronze, Inconel, titanium
If you’re unsure whether your part is a good fit, send us a drawing—we’ll assess it same-day.
Why Use Keyseating for Internal Keyways?
Compared to traditional machining methods, keyseating offers:
Superior accuracy for tight-fitting components
Ideal for blind holes and enclosed parts
Works well on hardened parts and exotic alloys
Minimal setup costs for low-volume or prototype runs
It’s the most effective solution when broaching is too aggressive, and EDM is too slow or expensive.
Applications We Support
Internal keyways are essential in components where torque transfer and alignment are critical. We routinely machine keyways for:
Splined shafts
Pump impellers
Gears and sprockets
Drive couplings
Industrial rollers
Heavy machinery assemblies
If your part needs reliable internal engagement—our shop is built for it.
Industries We Serve
We provide keyway machining services for:
Aerospace
High-precision keyseating for aerospace parts and components.
Automotive
Machines capable of creating custom keyways for automotive transmission and engine parts.
Construction
Heavy-duty keyseating equipment suitable for demanding environments.
Energy & Utility
Machines for keyway cutting in power generation and utility equipment.
Nationwide Service with Fast Turnarounds
We work with machine shops, OEMs, and production managers across the U.S. offering:
Quick quoting (24h turnaround)
Rapid turnaround for small runs
Blind shipment capability for white-label or contract machining
Engineering feedback available on request
Request a Quote for Internal Keyway Machining
Use the form below to upload your drawing or spec sheet. We’ll get back to you with a fast, accurate quote and lead time—typically within 1 business day.