Grade 1: Accuracy: 0.01mm . The ER elastic collet made of bearing steel has high elasticity and service life.
All ER elastic cartridges are precision ground and manufactured in accordance with German DIN 6499 precision specifications .
The ER has a 1mm elastic space for expansion and contraction.
Second grade: Accuracy: 0.01--0.015mm . The ER elastic cartridge made of bearing steel has high elasticity and service life .
All ER elastic cartridges are precision ground and manufactured in accordance with German DIN 6499 precision specifications .
The ER has a 1mm elastic space for expansion and contraction.