成人区人妻精品-成人区人妻精品一区二-成人区人妻精品一区二欧美毛片-成人区人妻精品一区二区-成人区人妻精品一区二区不卡网-成人区色情综合小说

ZRQ140B2-DHD350 drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ140B2-DHD350

7-Φ18Q

7-Φ14Z

Convex surface

2

8

16

ZRC5A

ZRC5

DHD350

COP54

ZRQ140B2-DHD350 drill bit features

The ZRQ140B2-DHD350 drill bit is developed by our company based on the original ZRQ140G-B drill bit according to the characteristics of domestic rock formations

A general-purpose drill bit developed by the company. Its side teeth are made of seven 18mm alloys to ensure the wear resistance and fracture resistance of the alloy.

Yes, at the same time, the big head adopts a double-step layout, which effectively improves the efficiency of gearing, and the bit body adopts a special heat treatment process

Technology, effectively reducing the probability of damage such as breakage, chipping, etc., so that the bit body and the alloy life can be effectively matched,

Embodied the characteristics of long life and high efficiency.