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Step Drill Bit

step bit
step bit
step drill

According to the need to process different diameters of holes, and can achieve large holes in one-time processing, without the need to replace the drill bit and playing positioning holes and so on. On the forming workpiece of step parts, multiple step holes are processed by one-time forming drilling, composite forming, fast and time-saving. High efficiency, saving non-processing man-hours. Use special equipment to grind and process, high precision. Adopting high quality alloy bar, good wear resistance.


Specifications of Step Drill Bit


Solid Carbide Straight Flute Drill for Au. Cast iron

Engineering Data

  • four-sided grinding

  • straight flute

  • for machining of short chipping materials

  • for machining of thread core holes

  • cutting till countersinking step

Solid Carbide Straight Flute Drill for Au. Cast iron


d1(h7

L3L2L1d3d2
d1(h7)

L3L2L1d3d2
mm

mmmmmmmm(h6)mm

mmmmmmmm(h6)
3.3M4GS11.420626610.2M12GS30601071414
3.65M4GF11.420626611.2M12GF30601071414
4.2M6GS13.628666612M14GS34.5651151616
4.65M5GF13.628666613.2M14GF34.5651151616
5M6GS16.534798814M16GS38.5731231818
5.55M6GF16.534798815.1M16GF38.5731231818
6.8M8GS214789101015.5M18GS43.5791312020
7.4M8GF214789101016.9M18GF43.5791312020
8,5M10GS25.555102121217.5M20GS47.5891472220
9.35M10GF25.555102121218.9M20GF47.5891472220


¢d1 (h7)   mm

L3     mmL2     mmL1     mm¢d3            mm¢d2  (h6)   mm
3.3M4GS11.4206266
3.65M4GF11.4206266








4.2M5GS13.6286666
4.65M5GF13.6286666








5M6GS16.5347988
5.55M6GF16.5347988








6.8M8GS2147891010
7.4M8GF2147891010








8.5M10GS25.5551021212


¢d1 (h7)   mm

L3     mmL2     mmL1     mm¢d3            mm¢d2  (h6)   mm
10.2M12GS30601071414
11.2M12GF30601071414
12M14GS34.5651151616
13.2M14GF34.5651151616








14M16GS38.5731231818
15.1M16GF38.5731231818








15.5Ml8GS43.5791312020
16.9M18GF43.5791312020








17.5M20GS47.5891472220
18.9M20GF47.5891472220


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+028-87751246
Room2918, Building 2, Mingyuan Shangzhu, No. 8, West Yuren Road, Jinniu District, Chengdu, Sichuan, China
Room2918, Building 2, Mingyuan Shangzhu, No. 8, West Yuren Road, Jinniu District, Chengdu, Sichuan, China
rnktools@vip.163.com
+028-87751246