Haeger 618 MSPE Precision Surface Grinder.

±0.0005" on properly fixtured parts up to the 6" × 18" chuck size. For longer parts we step-grind in registered passes; flatness across the joints holds to ±0.001". Verified on a granite surface plate.

32 Ra μin on hardened steel and tool steel with appropriate wheel selection. Down to 16 Ra on softer materials with finishing wheels. We document the achieved Ra per part on jobs where surface finish is spec'd.

Tool steel (D2, A2, S7, O1, M2 HSS), hardened steel up to 65 HRC, mild steel, stainless 304/316/17-4 PH, cast iron, and carbide. Soft non-ferrous materials (aluminum, brass) are typically better suited to milling — we'll route them to the DMV-400 instead.

If your part needs flatness tighter than ±0.001" or surface finish under 64 Ra, the mill alone can't reliably hit it. Grinding is also the right call when the material is harder than mill cutters can practically machine (above ~40 HRC). For loose-tolerance parts in soft materials, milling is faster and cheaper.

Yes — hardened steel up to Rockwell C 65 grinds clean on the appropriate wheel. We keep wheels for D2, A2, M2 HSS, and case-hardened steel in stock. Soft-state milling followed by heat-treat and finish-grind is a common workflow for production tooling.

Fixtures and tooling components ship in 3-7 days when the design is locked. Production parts that include grinding as a secondary op run on the broader job schedule (typical 1-2 weeks). Rush surface-grinding work (resurfacing, gauge plates) often turns same-week.

Yes — most surface grinding work supports our own laser, brake, and mill jobs, but we also take grinding work from outside customers across the Greater Toronto Area. Pickup at our Brampton shop or delivery within the GTA. Lead time depends on shop load — typically 3-7 working days.