High Accuracy ，ER Straight Shank Collet Chuck

chongde ER25UM 3/4" Collet Chuck Tool Holders With Straight Shank 2" 

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 C8,C10,C12,C16... 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

1.Standard size are tested by Diebold standard inspection tools which made in Germany.

2.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.