Spring Chuck Engraving Milling Machine Collet Hardware Tool Accuracy 0.015mm ER3220

1、After heat treatment and cold drawing hardening the strength is higher and it has a certain degree of flexibility and plasticity. 2、With mature technology stable and reliable the concentric accuracy of the inner and outer cones is 0.015mm. 3、Widely used in milling drilling tapping engraving CNC spindle machine clamping tool etc. 4、This spring chuck has a bright appearance and exquisite workmanship of chamfering. 5、The engraving machine spring collet is well?made and has a high clamping force.