TurningMillingDrillingTechnicalInformationIndex Trouble shooting – drilling Technical information Trouble shooting – PC seriesMachining Recommendation A Sloped surface – Inclined surfaces should be pre-machined (chamfering). >αmax B Inclined surface – Reduce feed rate accordingly. Feed rate α Inclination angle Max. feed rate C 1° 80 % Feed rate 2° 50 % 3° 30 % D E C169