Turning troubleshooter · Chips
Long, stringy chips
Chips come off in long ribbons or bird’s nests that wrap the part, the tool or the chuck.
Likely causes
- Feed too light for the chipbreaker
- Depth of cut too shallow to reach the chipbreaker
- Nose radius large for the depth of cut
- A small entering angle (big lead) thinning the chip
What to change
Fixes both makers give come first. Change one thing at a time, and see what it does.
- 1
Raise the feed
Into the chipbreaker’s range; the box or catalog gives it.
Sandvik · Mitsubishi
- 2
Take a deeper cut
The chip needs to reach the chipbreaker to curl.
Sandvik · Mitsubishi
- 3
Use a smaller nose radius
Sandvik · Mitsubishi
- 4
Use a holder closer to a 90° entering angle (less lead)
A thicker chip breaks more easily.
Sandvik · Mitsubishi
- 5
Pick a chipbreaker made for this feed and depth
Sandvik · Mitsubishi
- 6
Turn the coolant on, or aim it at the chip
Sandvik · Mitsubishi
- 7
Lower the cutting speed
Mitsubishi
Work it out
- Turning speeds & feeds — a starting speed, feed and depth for your insert
Often comes with
Sources
Written in our own words from each maker's troubleshooting guide.