milling tool holder BT FMB face milling holder

milling tool holder BT FMB face milling holder,Material:  alloy 20CrMnTi, wear-resistant and durable. Tool handle hardness 58-60 degrees, low noise, low wind resistance, high repetitive clamping accuracy. It is a tool handle for special face milling cutter disc. The whole through hole is conducive to water discharge and has good seismic resistance. BT Face Milling Holder Can be customized Various non-standard length , can do dynamic blance test G6.3 G2.5

BT Face Milling Holder Material : 20CrMnTi;
BT Face Milling Holder Hardness : 58+/- 2 HRC;
7:24 taper tolerance less than AT3;
BT Face Milling Holder Carbon depth : more than 0.8mm;
Surface roughing : Ra less than 0.4u ;
Provide 2 kinds appearance :sand-blasting and electroless plating process;
Sub-zero treatment : All of the CNC chucks are processed long time Sub-zero treament (-180oC , more than 20 hours ) , Mke the residual austenite into martensite and precipitate  os nona-sized carbide particles , enhance chucks hardness, toughness durability, and reduce the residual internal stress, 
Thermal aging treatment can get rid of the residual interna stress in grinding process.
BT Face Milling Holder All the handle to do dynamic balance test, G6.3  G2.5.

Main Features
1) The material tool steel for cutter is from large steel plant, it improve the stability of product.
2) The connecion part is prcision grinding and chamfer scratch prevention.