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
- Diamond grinding is common for precision surfaces and cylindrical features.
- EDM can help with shapes or features that are difficult to grind mechanically.
- The right process depends on geometry, finish, tolerance, and material grade.
| Feature need | Diamond grinding | EDM |
|---|---|---|
| Precision OD | Strong | Limited |
| Complex profile | Depends on access | Strong |
| Surface finish | Strong | Process dependent |
| Sharp internal features | Limited | Often useful |
Process choice is geometry driven
Carbide finishing often uses specialized processes because conventional machining is limited. Diamond grinding is strong for accessible surfaces, OD features, and flatness. EDM can be useful when geometry is difficult to reach with a wheel.
Surface and edge considerations
Grinding and EDM can leave different surface and edge conditions. The final application should define whether finish, micro-edge integrity, or dimensional repeatability is most important.
Combine processes when needed
Some carbide components may use more than one process. A blank can be ground for primary dimensions and EDM-cut or finished for more complex features.
What to Include in an RFQ
- feature geometry
- surface finish
- tolerance
- grade and material condition
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 carbide be EDM machined?
Yes, conductive carbide grades can often be EDM processed, depending on geometry and requirements.
Is grinding more accurate than EDM?
It depends on the feature. Grinding is excellent for accessible precision surfaces and ODs; EDM is useful for complex shapes.
Which process is cheaper?
Cost depends on geometry, tolerance, finish, quantity, and setup needs.