Surface Grinding Suppliers in Illinois
9 vetted U.S. suppliers · 1 state
Illinois — particularly the Chicago metro — has one of the densest tool-and-die corridors in the U.S., supported by surface-grinding shops covering precision flatness and surface-finish work. Below is our live count of vetted IL surface-grinding suppliers, with one-click RFQs to multiple at once.
Geographic distribution
Where these suppliers are
Top 1 states by vetted-supplier density.
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What surface grinding covers
Surface grinding is precision finishing using a rotating abrasive wheel to remove material from flat surfaces — used to achieve flatness, parallelism, and surface-finish targets that machining alone can't hold. Common downstream: die plates, gauges, fixtures, hardened parts, and any part where ±0.0001" flatness and 16 Ra (or better) surface finish matters. Most surface-grinding shops also offer Blanchard grinding (for large rotary work) and cylindrical grinding (for shafts).
What to look for in a supplier
Match the grinder to the part: reciprocating surface grinders for precision flatness on small parts (typically under 24" × 12"), Blanchard for large flat work (up to 72" diameter), cylindrical for shafts and round parts. Ask about machine bed size, max workpiece weight, and dimensional/finish tolerance. For hardened part work, confirm the shop has experience with your specific alloy — D2, H13, 17-4 PH all grind differently and choosing the right wheel matters. Inspection capability: surface plates, height gauges, profilometers for surface-finish measurement.
FAQ
Common questions
What's the difference between surface grinding and Blanchard grinding?
Surface grinding uses a horizontal-spindle reciprocating grinder — best for small precision parts where ±0.0001" flatness matters. Blanchard grinding uses a vertical-spindle rotary grinder — better for large flat work where ±0.001" flatness over a big area is the goal. Blanchard leaves a characteristic crosshatch pattern; surface grinding leaves a linear pattern.
What surface finish can grinding hold?
Standard surface grinding: 32 Ra or better. Precision grinding with a fine wheel: 16 Ra. Lapping or honing follows for finer finishes (8 Ra or below). For ground surfaces, the wheel grit, dressing condition, and feed rate all matter.
What materials are typically surface ground?
Most often hardened tool steel (D2, A2, H13, S7), pre-hard alloy steel (4140 HT), hardened stainless (17-4 PH H900), and air-hardened carbon steel. Soft materials (annealed steel, aluminum) are usually machined rather than ground — grinding works best on hardened surfaces.
What's the typical lead time for surface grinding?
Job-shop surface grinding for tool-and-die work: 1-2 weeks. Production grinding and large work: 2-4 weeks. Aerospace or medical work with full inspection records can run longer due to documentation.
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