Retention Knob NT ISO Pull Studs

Retention Knob NT ISO Pull Studs,Precision finished on the bottom of the flange to improve fitting with the bottom nose of the taper on the TOOL HOLDER.Pull studs of minor quality not only decrease the performance of the machine,they are even a safety risk.A breaking Pull Stud might cause severe damage on machine and workpiece and even injuries on persons.

Specifications 
1, Material: 20CrMnTi 
2, Pull stud is mainly used for connet the tool spindle and Tool Holder 
3, the type: Bt Pull Stud, SK Pull Stud, ISO7388 Pull stud, CAT pull stud, Mazak Pull Stud, MTB Pull Stud, NT Pull Stud 
4, hardness: 52-58HRC 
5, Surface blackening, grinding 
6, Total Length:54mm, screw: M16  
7. Costly heat treatment in several steps 
8. Spots with highest stress tempered specifically 
9. High impact strength 
10. Precision can reach 0.015mm 
11. Highest security and reliability  
12. Suit for mill chuck holder 
13. All critical pull stud surfaces precision ground. 
@ thread and other parts of the lower hardness: 35 + 5HRC (protection of stem thread, canwithstand the impact of core hardness) 
@ processing cryogenic treatment and thermal aging can reduce the residual stress, improve the durability and stability.