This guide supports Extramet’s tungsten carbide machining services by answering the practical engineering and purchasing questions that usually come before an RFQ.
Quick Answer
- Cylindrical grinding is well suited to features that centerless grinding cannot handle.
- Shoulders, steps, and tapers require clear datum and tolerance definitions.
- Grade and edge condition influence grinding strategy.
| Feature | Why cylindrical grinding helps | Drawing note |
|---|---|---|
| Shoulder | Controls transition geometry | Define radius and face tolerance |
| Step | Controls multiple ODs | State each diameter and length |
| Taper | Controls angle and fit | Define angle and inspection method |
When centerless is not enough
Centerless grinding is excellent for simple cylinders, but shouldered, stepped, or tapered carbide parts often need cylindrical grinding to control feature relationships.
Datum clarity prevents confusion
If the part has multiple diameters or functional faces, the print should state datums, concentricity needs, shoulder radii, and which dimensions are critical.
Edge protection
Carbide features can chip if edges are unsupported or too sharp. Radii, chamfers, and process notes help protect working geometry.
What to Include in an RFQ
- drawing with datums
- diameter and length for each feature
- radii or chamfers
- tolerance, finish, and inspection needs
Related Extramet Resources
Reviewed for technical accuracy: This supporting article was prepared to align with Extramet’s tungsten carbide manufacturing, grinding, inspection, and quality capabilities in Latrobe, Pennsylvania.
Frequently Asked Questions
Can centerless grinding make shoulders?
Centerless is limited for shoulders and complex profiles. Cylindrical grinding is usually better for those features.
Why specify shoulder radius?
A proper radius can reduce stress concentration and chipping risk.
Can tapers be ground in carbide?
Yes, when geometry, setup, and inspection requirements are defined clearly.