In F25 collets (DIN 145E), the d dimension is 25 millimeters. This collet gets its name from this dimension. The A dimension is 35 millimeters and the B dimension is 27 millimeters. The K angle is 16 degrees.
As Erveysa, we grind the above-mentioned dimensions precisely. Again, we grind the inner diameter dimension, which is the diameter that holds the material, precisely.
F25 collet (DIN 145E) is ground with a precision of 0.01 mm in diameter 10 millimeters.
In our ultra-precise collet production, we produce with a precision of 0.008 mm in diameter 10 mm.
If desired, we can open a thread on the inside of F25 collets.