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MACOR® Machining Specifications

Technical information about the processing of MACOR®

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  • MACOR® (Machinable Glass Ceramic (MGC))

General Information

Essential factors for the successful processing Semi finished MACOR parts, MACOR toolsof MACOR® are proper machining speeds and the selection of a suitable coolant. The glass-ceramic can be processed with conventional HSS tools, although we recommend using carbide tools for more extended wear. Further, we recommend using water-soluble coolants designed for sawing and grinding glass or ceramics. Post-firing after machining is not necessary. On the right, you find typical values for the machining of MACOR®.

Back to the MACOR® datasheet

 

Processing Parameters

 

Sawing

  • Carbide-grit blade
  • Alternative: silicon carbide or diamond cut-off wheel
  • Band speed: approximately 30.5 m/min.

Turning

  • Cutting speed: approximately 9–15 m/min.
  • Feed rate: approximately 0.05–0.13 mm/round
  • Depth of cut: approximately 3.8–6.4 mm

Milling

  • Cutting speed: approximately 6.1–10.7 m/min.
  • Chip load approximately 0.002 ipt
  • Depth of cut: approximately 3.8–5.1 mm

Drilling

Drill size
(mm)

Spindle Speed
(rpm)

Feed rate
(mm/r)
approx. 6.4 300 0.13
approx. 12.7 250 0.18
approx. 19.0 200 0.25
approx. 25.4 100 0.30
approx. 50.8 50 0.38

Tapping

  • Clearance holes are approximately 0.2–0.3 mm larger than those used for metals
  • Chamfer both ends of the hole
  • Run the tap in one direction only
    (Do not turn the tap back and forth.)
  • Continuously flush with water or coolant to remove chips and dust

Grinding

  • Use diamond, silicon carbide, or aluminum oxide grinding wheels

Polishing

  • Start with loose 400-grit silicon carbide on a steel wheel
  • You can do final polishing with cerium oxide or alumina on a polishing pad for glass or ceramics.

*We assume no liability for all processing details mentioned here. Errors are possible and remain reserved.

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Last update: May 21, 2024