Metric 3 Flats Shank HSS Step Drill Bit , Spiral Flute Step Up Drill Bit Chip Breaker

Metric 3 Flats Shank HSS Step Drill Bit , Spiral Flute Step Up Drill Bit Chip Breaker

1. CBN ground flute
CBN ground spiral flutes enable very sharp and burr-free cutting edges compared to the ordinary milled flutes. Especially the chip flow isoptimized, so even long, non-breaking chips will be removed easily. The optimized chip flow protects the cutting edges and reduces built-upedges and cold weld marks. Due to these special features, cutting performance and tool life are extended significantly.
2. Radially adjusted relief produced by CBN grinding
Each step has a radially adjusted relief produced by CBN grinding that relates directly to the diameter of the step.This means the cutting edge is always the highest point of the diameter.
3. Flute
Each step is axially CBN relief ground. This means the cutting edge is always the highest point of the axial cutting axis.
4. CBN ground relief angle
The cutting edge of each step has relief angle. This means the cutting edge is also the highest point in advance direction.
5. CBN ground bit with split point DIN 1412 C
The CBN ground bit ensures centering and spot-drilling even in thin-walled material.

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4. Why choose us:

JIANG SU XING RUI TOOLS CO., LTD. is one of the professional manufacturers of different kinds cutting tools in china, specialized in all kinds of HSS twist drill bits, SDS drill bits ,wood working drill bits , HSS machine Taps,hand taps,spiral flute taps,End mill,Hole Saw and some other power tool accessories. We're located in hou xiang town,Danyang city,Jiang Su province,with very convenient transportation to HuNing Expressway, and the north of the Yangtze River.

With rich experience, advanced technology and professional skills, our products can always maintain the first class quality in China .In recent years, our products have being widely sold to both domestic and foreign markets, and well received by the customers worldwide, such as in America, Europe, Middle East, Indonesia and so on .

Competitive prices are always offered to our satisfied customers .No matter the order is big or small, we always do our best service for our customers at any time .We will grow up stronger with our customers shoulder by shoulder and would like to keep our mutual benefit relationship supported by both your efforts and ours. Meanwhile, We highly appreciate our customers for their support, we also thanks a lot for the people who gave their concern to us and helped us in our development.

Hope to create a brilliant future with you!