Page 576 - Dormer
P. 576
GENERAL HINTS
TROUBLE SHOOTING WHEN MILLING
PROBLEM CAUSE REMEDY
Breakage Too high stock removal Decrease feed per tooth
Feed too fast Slow down feed
Wear Flute length or overall length too Hold shank deeper, use shorter end mill
long
Workpiece material too hard Check Catalogue or Selector for correct tool with higher
grade material and/or proper coating
Improper feed and speed Check Catalogue or Selector for correct cutting parameters
Poor chip evacuation Reposition coolant lines
Conventional milling Climb milling
Improper cutter helix See recommendation in Catalogue/Selector for correct tool
alternative
Chipping Feed rate too high Reduce feed rate
Chattering Reduce the RPM
Low cutting speed Increase the RPM
Conventional milling Climb milling
Tool rigidity Choose a shorter tool and/or place shank further up holder
Workpiece rigidity Hold workpiece tightly
Short Tool Life Tough work material Check Catalogue or Selector for correct tool alternative
Improper cutting angle and Change to correct cutting angle
primary relief
Cutter/workpiece friction Use coated tool
Bad Surface finish Feed too fast Slow down to correct speed
Speed too slow Increase the speed
Chip biting Decrease stock removal
Tool wear Replace or regrind the tool
Edge build up Change to higher helix tool
Chip welding Increase coolant quantity
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