CNC Grinding Australia
Surface, cylindrical, internal, and centreless grinding for precision components. When milling and turning aren't precise enough — tolerances to ±0.002mm.
ISO 9001:2015 certified · Hardened materials welcome · Quotes in 2 business days
Grinding Capabilities
Surface Grinding
Flat, parallel surfaces on blocks, plates, and prismatic components. Flatness to 0.002mm over 300mm.
±0.002mm flatnessCylindrical Grinding
OD grinding of shafts, pins, and round components. Precise diameter, roundness, and surface finish.
±0.002mm diameterInternal Grinding
Bore and ID grinding for bearing housings, bushings, and precision holes.
±0.003mm boreCentreless Grinding
High-volume OD grinding of shafts and pins without mounting between centres.
±0.005mm diameterJig Grinding
Precision hole and profile grinding in hardened components. Die sets, tooling plates, fixture components.
±0.002mm positionalProfile Grinding
Complex contour and form grinding. Thread grinding, gear grinding, and shaped form grinding.
Profile to ±0.005mmCNC Grinding FAQ
What is CNC grinding?
CNC grinding is a precision machining process that uses abrasive wheels to remove small amounts of material, achieving extremely tight tolerances and fine surface finishes that conventional cutting tools cannot match. Grinding is typically used as a finishing operation after milling or turning, bringing dimensions to final tolerance and achieving surface finishes of Ra 0.2 μm or better. CNC control enables complex contoured and cylindrical profiles to be ground with consistent accuracy.
What types of CNC grinding are available?
The main grinding types are: Surface grinding — produces flat, parallel surfaces on block and prismatic components; Cylindrical grinding (OD grinding) — grinds the outside diameter of round parts to precise diameter and roundness; Internal grinding (ID grinding) — grinds bores and internal diameters; Centreless grinding — high-productivity OD grinding without centres, for shafts and pins; Jig grinding — for grinding holes and profiles in hardened components to tight positional tolerances; and Profile grinding — for contoured and form ground components.
What tolerances does CNC grinding achieve?
CNC grinding achieves tolerances that conventional machining cannot: diameter tolerances of ±0.002mm (2 microns) on cylindrical grinding; flatness of 0.002mm over 300mm on surface grinding; surface finish of Ra 0.2 μm standard, Ra 0.05 μm achievable with fine wheel selection and dressing. These tolerances make grinding essential for bearing seats, precision shafts, gauging surfaces, and hydraulic components where interference fits and fluid sealing require exact dimensions.
When should I specify grinding instead of just milling or turning?
Specify grinding when: (1) Tolerances are tighter than ±0.01mm — grinding is the reliable way to hit ±0.002–0.005mm; (2) Surface finish better than Ra 0.8 μm is required — grinding achieves Ra 0.2 μm as standard; (3) Parts are hardened — grinding is unaffected by hardness; (4) Bearing seats require precise diameter and roundness; (5) Flatness better than 0.005mm over 200mm is specified; (6) Hydraulic or pneumatic components require fluid-tight sealing surfaces.
Quote Your Grinding Project
Upload your STEP file and drawing. We'll review tolerances and provide a quote within 2 business days.
Get Your Free Quote →