Tru-Grind, Inc.
Precision Grinding and Honing Service
Grinding internal features such as inner diameters, seats, chamfers and faces.
Internal Grinding
Tru-Grind specializes in precision grinding of internal diameters, seats, tapers, radii, and faces in relation to datums and other critical features.
Quality
Guarantee precise control of critical features such as size, roundness, finish, cylindricity, runout, concentricity, and perpendicularity.
Applications
Our expertise in internal grinding is second to none, ensuring the highest quality on gears, bushings, sleeves, cages, and valves.
Internal Grinding
Concentricity & Runout
Establishing concentricity and runout as low as 0.0001" (0.0025 mm)
Roundness, Straightness, & Cylindricity
Establishing roundness, straightness, and cylindricity as low as 0.000030" (0.8 μm).
Size & Surface Finish
(Ra, Rz, Rmr)
Grinding IDs from Ø0.050" to Ø20" (Ø1.3 to Ø500 mm) while holding tolerances as low as ±0.00003" (0.0008 mm).
Holding finish as low as 4 Ra (0.1 μm)
Features
Grinding internal diameters, seats, tapers, radii, and faces in relation to datums and other critical features.
Internal Grinding Capabilities