Technical glass ceramics picture, MACOR semi-finished parts
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MACOR® Machining Specifications

Technical information about the processing of MACOR®

General Information

Important factors for successful processing of MACOR® Semi finished MACOR parts, MACOR toolsare proper machining speeds and the selection of a suited coolant. The glass ceramic can be processed with conventional HSS tools although it is recommended to use carbide tools for longer wear. Further it is recommended to use water soluble coolants designed for sawing and grinding glass or ceramics. Post firing after machining is not necessary. On the right you will find typical values for the machining of MACOR®

Back to the MACOR® data-sheet


Processing Parameters



  • Carbide grit blade
  • Alternative: Silicon carbide or diamond cut-off wheel
  • Band speed approximately 30,5 m/min.


  • 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


  • Cutting speed: approximately 6,1 - 10,7 m/min.
  • Chip load approximately 0,002 ipt
  • Depth of cut: approximately 3,8 - 5,1 mm


Drill size

Spindle Speed

Feed rate

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


  • Clearance holes 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


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


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


*We do not overtake any liability for any of the machining specifications mentioned here. Errors are possible and excepted.