Accusize R8 Shank Er40 Collet Chuck, 7/16'' -20 Drawbar End, Max T.I.R. 0.0002'' O.D to I.D. 0223-0240

Made of high grade tool steel, Max RPM: 8000rpm. R8 Shank for ER40 Collets. Drawbar End: 7/ Hardened and precision ground. Max TIR 0.0002" O.D to I.D,This is an ultra-precision workholding tool. When doing the inspection to ensure that each part is wiped especially clean, and the installation must be in place, otherwise it has a great impact on the accuracy,When testing, whether the user's machine tool spindle has errors on the accuracy also has a great impact.

So you need to ensure that the accuracy of the spindle of the user's test machine must be high. In addition, please make sure that the accuracy of the ER collet must be high, many ER collets are marked as 0.0005", many of them cannot reach it.,If the accuracy of the collet in the hands of the customer is low, the accuracy of our toolholder is no longer high enough to detect the accuracy.