Specification
Model Number: ER8,ER11,ER16,ER20,ER25 Tool rod (motor shaft)
Precision: 0.001mm~0.003mm
Material: 42CrMnTi
Outside diameter:
C16: 5mm-8mm
C20: 6mm-14mm
C25: 8mm - 16mm

Features
The tail hole is 0.02mm smaller than the actual one.
It needs 300°~400° high frequency heating during assembly.
The principle of thermal expansion and cold shrinkage will expand the hole.
The spindle will be placed in it, the top wire will be locked, and the knife sleeve will be completely fixed after cooling.
For example: motor shaft 10mm, shank hole diameter 9.98mm, need high frequency heating installation.

The product is a normal design, you can install the chuck according to the following steps:
1. Insert the chuck diagonally from the side of the nut with the smallest oval diameter.
2. Gently push the chuck to make the chuck fully enter the inside of the oval.
3. Disassembly is the same step.
Priority is to install the chuck into the nut without falling, and place it in the tool holder to tighten the nut.
The chuck is a spring chuck, the tighter you tighten, the greater the clamping strength.