To the "Mechanical Workers" reader

On the occasion of the arrival of the New Year in 1991, the editorial department of "Mechanical Workers" extended a festive congratulation to the vast number of readers, authors and correspondents to all the employees fighting on the mechanical industry front. "Mechanical Workers" has been invented since 1950 and has been through forty years. In the past 40 years, under the active support of the leaders of the National Federation of Trade Unions, the Ministry of Electrical and Mechanical Services and the National Association of Science and Technology, and with the enthusiastic help of the authors, readers, correspondents and reviewers, the "Mechanical Workers" has promoted the production technology of the machinery industry. Development, in order to improve the technical quality of mechanical workers, has done a lot of work and achieved great social and economic benefits.

Deep Hole Step Drill

Step drill, is mainly used for drilling thin steel plates within 3mm. One drill bit can be used instead of multiple drill bits. Holes of different diameters can be processed according to needs, and large holes can be processed at one time. There is no need to replace the drill bit and drill positioning holes.


According to the groove shape of the product, it can be divided into straight flute drills and spiral flute drills.

Deep Hole Step Drill




Deep Hole Step Drill,Extra Long Drill Bits For Steel,Long Carbide Drill Bits,Step Drilling Operation

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