Sandvik Coromant Machining carbon fibre materials - Manual (Page 61)

Cutting data
Tipycally: •
- speed 60-120 m/min
- feed rate 0.02-0.15 mm/rev
PCD allows for higher feed and sometimes speed •
With positive geometries high feed rate must be •
avoided (>0.1mm/rev)
Low feed rate reduces delamination, especially at •
the hole exit
High speed can melt/damage the resin (especially •
thermoplastics)
Diamond coated and PCD drills have a higher •
thermal conductivity, which results in reduced
effects on hole dimension variation.
SANDVIK COROMANT USER’S GUIDE - COMPOSITE SOLUTIONS 61