Internal Diameter Grinding Services
ID grinding from 1 inch to 36-inch ID with tolerances as tight as 0.0002 inch.
Precision Grinding
A Niche Grinding Capability for Fit-Critical Bores
HFW Industries provides internal diameter grinding services, holding tolerances as tight as 0.0002 inch on parts from 1 inch to 36-inch ID.
ID grinding is a niche within a niche. Few shops can do it well and hold tight tolerances. HFW's ID grinding capability is part of a larger grinding department in Buffalo, New York, that has been doing precision grinding work since 1950.
- Bearing housings, bearing sleeves, bores, rolls, and seal housings
- Standalone ID grinding or ID grinding as part of a larger rebuild
- Grinding coordinated with machining, thermal spraying, or hardfacing
Much of this work comes down to fit. A shaft has to seat precisely inside a bore, sleeve, or housing, so both surfaces, the shaft's outer diameter and the mating part's inner diameter, need to be ground to match. Get that fit wrong, even slightly, and the equipment may wear out or fail prematurely once it is back in service.

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FAQ
Internal Diameter Grinding Questions
What ID grinding size range can HFW handle?+
HFW offers ID grinding from 1 inch to 36 inches internal diameter with a 24-inch stroke.
What tolerance can HFW hold on ID grinding?+
HFW can hold 0.0002-inch tolerance on qualified ID grinding work.
When is ID grinding better than boring?+
ID grinding is used when a bore requires tighter tolerance, better surface finish, improved concentricity, or final finishing after coating beyond what boring can reliably provide.
Need an ID Grinding Quote?
Send drawings, bore size, stroke length, tolerance, surface finish, material, coating requirements, and timing. HFW will help define the right ID grinding path.
