chongde ER11M 5/8" Collet Chuck Tool Holders With Straight Shank 5.51" 

C ER/M straight Tool Holders for mechanical spindle and cutting tool and other accessory tool connection. Is a simple, popular spindle shank connection standard, mainly C 8, C 10, C 12, C 16... Etc.. Mold industry, and high-speed engraving machine, used more. ER/M straight Shank is longer, suitable for deep hole processing.

Comprehensive inspection way of chuck:

Surface of the clamping inner hole is grinding by high speed inner-aperture grinder, and inspect by standard pneumatic measurement instrument; the big end contact area rate is above 90%.

TYPE A / TYPE M / TYPE UM ARE DIFFENT, WHICH CAN BE JUDGED BY THEIR APPEARANCE

◎ Material: 20CrMnTi / JIS-SCM415, Surface hardness: 58±2 HRC.

◎ Shank is longer, suitable for deep hole processing.

◎ Outer diameter and other parts after grinding, eliminate the unbalanced allowance, conducive to the stability of the cutting.

◎ Can reduce to the selection of lengthen cutting tool, reduce cost and improve efficiency.

◎ Run out：≤0.00008" 

Cryogenic Treatment

◆ -384.8℉ long cryogenic, nearly all of the residual austenite into martensite.

◆ Carbide precipitation of Nanoscale particles, increasing the hardness and toughness.

◆ Reducing residual stresses.

◆ Wear resistance significantly improved.

Thermal Aging Processing

◆ long stereotyped thermal limitation removal of grinding residual stress.

Extension for Machining Deep Hole

◆ Solve the difficulty in machining deep hole.