Niagara Cutter

NC Trouble Chooting Guide

P R O B L E M S

CORRECTIVE ACTION	Abrasion	Cratering	Chipping	Built-Up-Edge	Excessive Chatter	Breakage	Chips Pack in Gullet	Chips Torn or Corrugated	Spindle Stalls in Cut	Finish Poor	Part Size Varies or Tapers
Use harder HSS to improve wear or red hard qualities	•	•
Use tougher HSS			•			•
Increase speed			•	•						•
Decrease speed	•	•			•				•
Increase chip load	•			•	•
Decrease chip load		•	•			•	•		•	•	•
Check cutter geometry, increase clearance or rake angles	•	•		•		•			•		•
Check cutter geometry, decrease clearance or rake angles			•		•
Check coolant	•	•	•	•		•	•			•	•
Check loose spindle bearings worn away			•		•	•				•	•
Check overarm support, use arm braces, use 2 overarm supports					•	•					•
Check overarm bearing					•	•
Check backlash eliminator tighten gibs			•		•	•				•	•
Check horsepower at spindle						•			•
Make work holding device more rigid			•		•	•				•	•
Support work in direction of cutting forces					•	•				•	•
Climb mill	•				•				•	•
Conventional mill		•	•
Decrease no. teeth (or alter for add. chip room)						•	•	•
Increase no. teeth	•		•							•	•
Decrease depth cut			•		•	•	•		•	•	•
Increase depth cut (get under scale)	•				•
Use larger arbor			•			•				•	•
Check alignmnet, cutter run out, arbor collars, arbor shank			•			•					•
Check speed & feed rates								•
CORRECTIVE ACTION	Abrasion	Cratering	Chipping	Built-Up-Edge	Excessive Chatter	Breakage	Chips Pack in Gullet	Chips Torn or Corrugated	Spindle Stalls in Cut	Finish Poor	Part Size Varies or Tapers

	New Concepts in Milling Handbook A practical approach and illustrated guide to milling cutter selection and use <Table of Contents © 1973 Niagara Cutter Inc.