ER25 series coolant collets have a capacity of .142-.630 inches. Each ER25 coolant collet has a range of .015 inches. The size indicated on the collet is the largest size it can hold and can be collapsed smaller within its collapse range mentioned above. For example, ER25-1/4 can grab a round shank from .250 diameter to .235 diameter. Please refer to our ER25 Collet print for general ER25 dimensions.
