Troubleshooting Guide

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Tool FaultsHole Faults
outside point wear
margin wear
excessive heat
flute packing
flute bend or whip
wear pad erosion
edge building
cratering
poor tool life
tool chipping
tool breakage

Trouble Area

poor finish
runout
bell mouth
banana
out of round
undersize
oversize
Bushing or Pilot: oversize
Workholding: unsuitable
Coolant: insufficient pressure
Coolant: incorrect type
Feed: erratic
Feed: excessive
Feed: insufficient
Misalignment
Spindle: speed high
Spindle: speed low
Incorrect nosegrind for material
Tool unsupported beyond 30:1
Tool contour incorrect
Tool clearance incorrect
Material - Heat treatment faults
Material - Overheat & or closing in
Material - Thin wall section
Tool - Heel drag
Tool - Needs resharp
Tight hole
Tool Vibration
Workpiece not against bushing