Did you know that there is a torque specification on your collets?
Many people use a cheater bar to tighten down collets believing that the "tighter is better" but that's not always the case. Like all toolholding collets, ER style collets are spring collets with a 30 degree front taper and a 16 degree back taper (a "free releasing 'locking-taper" just like your steep taper toolholder)
When the 16 degree taper "locks" and you continue to over-torque the collet nut, the collet can twist and, under the normal load of cutting conditions, the cutting tool will run-out. Be sure and check out our website and see the torque chart to make sure that you are getting the most tool-life out of your end mills and cutting tools.
|A toolholder set-up fixture that easily mounts |
to your Huot, Lista, or Rousseau Tool Cart