KOMET® – Solid Drilling - komet group

otating and stationary use
rotating use stationary use
KOMET KUB Quatron®
Problems � Possible causes � Solutions
Short tool life types of wear on inserts
• cutting speed to high � select correct cutting speed
• cutting material with too little wear resistance � select grade with higher wear resistance
• tool overhang too great � if possible use shorter tool
• damaged insert seating � check tool, change if necessary
• clamping device not stable enough � improve stability
Bore narrows at bottom
• chip jam on external cutting edge � use different chip fracture geometry, increase feed if necessary
• material very soft � increase cutting speed, reduce feed. Use positive chip geometry
Bore widens at bottom
• chip jam on internal cutting edge � use different chip fracture geometry, increase feed if necessary
Bad surface finish
• bad chip removal � improve cutting parameters: increase cutting speed reduce feed
Bild up on cutting edge
• cutting speed too low � increase cutting speed
• insert too negative � use positive geometry
• coating not suitable � select correct coating
Friction marks on tool shank
• bore diameter too small � check setting
• chip removal problems � improve cutting parameters, check geometry of inserts
• cutting edge corner radius too large � use correct cutting edge radius
Fracture on internal cutting edge
• drill bit height of tool too high/too low � tool turret/holder may have shifted. Readjust machine
• feed rate too high � reduce feed rate
• insert grade too brittle � use tougher insert grade
• wrong insert geometry � use geometry with chamfered cutting edge
Fracture on external cutting edge
• feed rate too high � reduce feed rate
• interrupted cut � change to tougher insert grade
• cutting edge corner radius too small � use insert with larger cutting edge radius
Bore too small/ too large
• machine not at X-0 position � move axis to correct position
• machine axis shifted � readjust machine
Fracture on internal cutting edge
• feed rate too high � reduce feed rate
• insert grade too brittle � use tougher insert grade
• wrong insert geometry � use geometry with chamfered cutting edge
Fracture on external cutting edge
• feed rate too high � reduce feed rate
• interrupted cut � change to tougher insert grade
• cutting edge corner radius too small � use insert with larger cutting edge radius
Bore too small/ too large with adjustable tool
• wrong cutting edge radius used � use correct cutting edge radius
• setting wrong � correct setting
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