国产乱子伦高清露脸对白-亚洲人成精品久久久久桥本-国产 欧美 亚洲 中文字幕-国产又粗又猛又爽又黄的视频免费-无码国模大尺度视频在线观看-天天免费看av-亚洲色成人网站www永久男男-午夜宅男在线永久免费观看网-美国一级黄色毛片-偷窥自拍青青草-亚洲美女爱爱-国精品人妻无码一区二区三区喝尿-视频在线一区二区三区-中文字幕在线观看国产-91大神精品在线

ZRQ90-CIR90 series drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ90

6-Φ14Z

2-Φ12Z

Convex surface

2

6

3.9

　ZRC3.5-CIR90

　ZRC3.5A-CIR90

2-Φ13Z

ZRQ90B

6-Φ14Z(H)

2-Φ12Z

Convex surface

2

6

3.9

2-Φ13Z

ZRQ90C

6-Φ14Z(H)

2-Φ12Z

Convex surface

2

6

3.9

2-Φ13Z

Model features:

ZRQ90 drill bit is a conventional low wind pressure 90 drill bit.

ZRQ90B uses a more wear-resistant alloy on the basis of conventional drill bits.

ZRQ90C drill bits not only use better alloys, but also take targeted improvements in the bit body and heat treatment process.

The wear resistance and service life of the product are improved, and the probability of abnormal damage of the drill bit is greatly reduced. It is especially suitable for

ZRC3.5A-CIR90 fast impactor.