Precision CNC Grinding for Tooling and Tight-Tolerance Components
Wisconsin Metal Parts provides CNC surface and form grinding services for components requiring exact dimensional control, precise geometry, and high-quality surface finishes. Grinding operations are commonly used to refine parts beyond standard machining capabilities, especially for tooling components, hardened materials, and critical wear surfaces. Our CNC grinding department can process a wide variety of part geometries and component types, with minimal operator attendance to support efficient production. We also design and build custom grinding and inspection fixtures in-house, ensuring repeatability and accuracy during both production and maintenance operations.
CNC Surface & Form Grinding Capabilities
Our grinding department is equipped for both flat and complex geometry grinding, supporting precision work across tooling and production components.
Core capabilities include:
- Precision surface grinding for flatness and parallelism
- Form grinding for 2D and 3D contours
- Programming directly from CAD models or drawings
- Tight-tolerance grinding for critical features
- Repeatable processing with minimal operator intervention
Tolerances & Surface Finish Control
Grinding is often required when parts demand extreme precision and refined surface finishes. Our CNC grinding systems allow us to adjust wheel speeds, table speeds, and coolant conditions to achieve optimal results for each project.
Our capabilities include:
- Tolerances as tight as ±0.0001” in size, shape, and flatness
- Surface finishes as fine as 8 Ra (depending on material and application)
- Consistent control of flatness, parallelism, and contour accuracy
Materials we can grind include:
- Hardened tool steels
- Carbon and alloy steels
- Stainless steel
- Aluminum (as required)
Quality & Process Control
Quality is built into every aspect of our manufacturing and finishing processes. As an ISO 9001:2015 certified and ITAR registered manufacturer, we maintain strict quality and security standards. Our systems comply with NIST SP800-171, ensuring secure handling of sensitive and export-controlled data.
CNC Surface grinding uses a CNC controller connected to a precision surface grinder that can achieve very accurate contours with incredible surface finishes. A CNC grinder also lends itself well to repetitive production grinding since we can quickly load parts and go.
Surface finishes and dimensional tolerances will vary depending on the project and the type of materials used but we can typically hold as fine as 8Ra” and as tight as .0001″ tolerance.
There are times when a ground finish is preferable to the smoothness of a Wire EDM finish. In a stamping die, slug retention is one of those factors. A surface or jig ground finish can help keep slugs in the die blocks and not pulling out when the punches retract.
We can grind almost any metal, hard or soft. Magnetic materials would be held by a magnetic chuck and non-magnetic materials would either be blocked in or use a fixture to hold them.
This machine works great for repetitive production grinding. We can use the magnetic chuck or a custom fixture to hold parts. Once the machine is loaded and running we can typically run it minimally attended. That translates into cost savings.