Qufu Chongde Precision Machinery Co., Ltd

The common specification of the shank is 30, 40, and 50, it is the diameter at somewhere of the taper shank. Toolholders are available in various gaug

Chongde toolholders and collet chucks are manufactured to the highest standards to take advantage of the performance characteristics of Chongde millin

Standard (hex and spanner types) ER/SK clamping nuts with corrosion resistant surface are standard on all Chongde ER toolholder.

Integrated design of the rob and collet, can avoid the collet and rob separate. High accuracy, strong grasp force and high stability. Easy broken par

Guarantee high accuracy & stabilization by sub-zero treatment and thermal aging. Conform to DIN6388A/B Specifications

The precision adjustable boring head is designed with precise worm, can adjust 0.01 diameter for each to change the dimension.

With a hardness range of 56-60 HRC and a pilot runout less than0 .005mm. The result is higher metal-removal rates, improved surface finish, and longer

Inner hole of the shank divide into 6 troughs to prevent the insert remove, increase the grasp force. Ball bearing cage is made of special material,

Material: 65mn Hardness: HRC44-48 Accuracy: 5micon or 8micron Specification: ER8-ER50 Clamping range: 1/32"-1-5/16" inch

Due to Chongdes special heat treatment, grinding and custom slotting process, they are what guarantee a 5 or 8 micron run out.