Surface grinding (flat surfaces)
We guarantee perfect flatness and parallelism of surfaces — critical for mounting datums and mating components.
Finishing operations
Grinding shafts, bores and flat surfaces
We take on tasks that demand exceptional accuracy, including extreme dimensional tolerances and tightly defined surface roughness parameters (Ra, Rz) in line with the requirements of the technical documentation.
Grinding capabilities
Comprehensive finishing across three key areas.
Cylindrical grinding
Precise finishing of the external surfaces of rotating parts, maintaining rigorous concentricity and cylindricity.
Internal grinding
Precise internal machining, essential for tight fits and mating components where every micron counts.
Why our grinding?
Modern control systems
Grinders with precise numerical control ensure repeatable parameters at every stage of the job.
Wheels matched to the material
Structural steels, alloy steels, hardened parts — each material calls for a different grain and bond. We select them deliberately.
Stable processes, quality control
Multi-stage quality control. Every part leaves the shop with an identical, repeatable finish — from prototype to series.
Broad range of materials
Structural and alloy steels, hardened materials — we machine what others shy away from.
Applications
What we grind most often
We grind where the surface does its job: fits, bearing seats, seal surfaces and datum faces. The rest of the part stays turned or milled, so you only pay for precision where it is needed.
Shaft grinding
- bearing seats and fitted diameters
- seal surfaces
- pins, arbors and guide axles
- shafts after hardening
Typical sequence: turning with stock allowance, heat treatment, finish grinding of the functional surfaces.
Bore grinding
- bearing bores
- guide and plain bushings
- fitted bores in hardened parts
A through bore is easier to grind than a blind one; at the bottom of a blind bore, plan an undercut for the grinding wheel run-out.
Surface grinding
- base and mounting plates
- strips, guides and sliding elements
- fixture and tooling components
- shims and spacer plates
Surface grinding delivers the flatness and parallelism that assembly accuracy depends on.
Accuracy and series
Precision where the part works
Grinding starts where finish turning reaches its limits. As a guide, turning ends at around IT7 and Ra 0.8–1.6, while grinding reaches IT5–IT6 and Ra 0.2–0.8. We confirm the achievable values for your part from the drawing.
How to specify a ground surface
On the drawing, assign the size tolerance (e.g. an H7/g6 fit), the roughness Ra and, where the function requires it, form and position tolerances such as roundness or coaxiality to specific surfaces. More in our guide on grinding bores and shafts.
Ground parts in series
For series we can produce a first-article batch with an inspection report on request, and the approved process is repeated for the following batches. Recurring orders and scheduled deliveries are described on our CNC batch production page.
Grinding · Purchasing
Questions before ordering grinding
Short answers for purchasing, design and quality assurance.
When does a part need grinding rather than turning alone?
When the fit or the function of a surface requires accuracy and roughness that turning cannot deliver, and when the surface is hardened. As a guide, this means tolerances in IT5–IT6 and roughness below Ra 0.8, for example bearing seats on shafts, bearing bores and guide bushings.
Do you grind parts after hardening?
Yes. Grinding after heat treatment is the usual sequence: the part is turned with stock allowance, hardened, and the functional surfaces are then finish-ground to restore size and geometry.
Do you make the whole part or only the grinding?
We can make the whole part in one plant: turning or milling, followed by grinding of the functional surfaces. This avoids shipping between suppliers, and one plant is responsible for the final dimension. We agree the scope based on the drawing.
What do you need for a grinding quote?
A drawing with size and form tolerances and the required roughness Ra per surface, the material and hardness, the quantity and the target date. With complete information you receive a quote within 48 hours.
Do you grind series as well?
Yes. We grind prototypes, single parts and repeat series. For series we can produce a first-article batch with an inspection report on request, because dimensions in tight tolerance classes need to be confirmed by measurement.
Need precision?
Send a drawing or describe your requirements — we will choose the process and reply with a quote.
Ask about grinding