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Procuct Name | 4-20mm HSS Spiral Flute Step Drill Bits Spiral Circulation Power Tools |
Size | 4-20mm (other Size is Available) |
Material | HSS |
Flute Type | Spiral Flute (Straight Flute is Available) |
Flute Number | Two Flutes (Single Flute, Three Flutes are Available) |
Shank | Quick Change Hex Shank (Three Flats Shank, Round Shank, Double R Shank are Available) |
Surface Finish | TiN (Bright, Black & Amber, Co-coated, Black Oxide, Black & Bright, TiAIN are Available) |
Package | 1pcs in one PVC bag,( other packing is available) |
Features | 1. Step drill bits are perfect for drilling and enlarging multiple-holes in thin sections of sheet metals, pipes, plexiglass, plastics, wood up to a thickness of 5mm. 2. 135° Spilt Point Tip: increases cutting speed with self-centering and the drills do not run off center. 3. A variety of hole diameters can be drilled using only one tool. 4. The dimension of drilled hole is exact. 5. Two Flute Design: provides longer life and better chip removal. 6. Titanium coating provides up to 2 times the life over high speed steel. 7. Only for rotary use. |
Metric Size Step Drill Bit | ||||||||
Drilling Range(mm) | Number of Steps | Dia of Steps(mm) | Overall length(mm) | Shank Dia(mm) | ||||
3-12 | 5 | 3-6-8-10-12 | / | 6 | ||||
3-12 | 10 | 3-4-5-6-7-8-9-10 | / | 6 | ||||
3-14 | 12 | 3-4-5-6-7-8-9-10-11-12-13-14 | / | 6 | ||||
3-14 | 1 | 3-14 | / | 6 | ||||
4-12 | 5 | 4-6-8-10-12 | 65 | 6 | ||||
4-12 | 9 | 4-5-6-7-8-9-10-11-12 | 65 | 6 | ||||
4-20 | 9 | 4-6-8-10-12-14-16-18-20 | 75 | 8 | ||||
4-22 | 10 | 4-6-8-10-12-14-16-18-20-22 | 80 | 10 | ||||
4-30 | 14 | 4-6-8-10-12-14-16-18-20-22-24-26-28-30 | 100 | 10 | ||||
4-39 | 13 | 4-6-12-15-18-21-24-27-30-33-36-39 | 107 | 10 | ||||
5-13 | 5 | 5-7-9-11-13 | 65 | 6.35 | ||||
5-20 | 1 | 5-20 | / | / | ||||
5-25 | 11 | 5-7-9-11-13-15-17-19-21-23-25 | / | / | ||||
5-25 | 11 | 5-7-9-11-13-15-17-19-21-23-25 | 82 | 9.5 | ||||
5-35 | 13 | 5-13-15-17-19-21-23-25-27-29-31-33-35 | 82 | 12.7 | ||||
6-18 | 7 | 6-8-10-12-14-16-18 | / | 10 | ||||
6-20 | 8 | 6-8-10-12-14-16-20 | 71 | 9 | ||||
6-25 | 7 | 6-9-12-16-20-22.5-25 | 65 | 10 | ||||
6-30 | 13 | 6-8-10-12-14-16-18-20-22-24-26-28-30 | 100 | 10 | ||||
6-32 | 9 | 6-9-12-16-20-22.5-25-28-30-32 | 76 | 10 | ||||
6-35 | 13 | 6-8-10-13-16-18-20-22-25-28-30-32-35 | / | 10 | ||||
6-36 | 11 | 6-9-12-15-18-21-24-27-30-33-36 | 85 | 10 | ||||
6-38 | 12 | 6-9-13-16-19-21-23-26-29-32-35-38 | 100 | 10 | ||||
6-40 | 16 | 6-11-17-23-29-30-31-32-33-34-35-36-37-38-39-40 | 105 | 13 | ||||
8-20 | 7 | 8-10-12-14-16-18-20 | / | / | ||||
9-36 | 10 | 9-12-15-18-21-24-27-30-33-36 | 85 | 12 | ||||
10-20 | 11 | 10-11-12-13-14-15-16-17-18-19-20 | 85 | 10 | ||||
16-30.5 | 1 | 16-30.5 | / | / | ||||
20-30 | 11 | 20-21-22-23-24-25-26-27-28-29-30 | 88 | 13 | ||||
Inch Size Step Drill Bit | ||||||||
Drilling Range(inch) | Number of Steps | Dia of Steps(inch) | Overall length(inch) | Shank Dia(inch) | ||||
1/8''-1/2'' | 13 | 1/8-5/32-3/16-7/32-1/4-9/32-5/16-11/32-3/8-13/32-7/16-15/32-1/2'' | 3 1/8'' | 1/4'' | ||||
1/8''-7/8'' | 13 | 1/8-3/16-1/4-5/16-3/8-7/16-1/2-9/16-5/8-11/16-3/4-13/16-7/8'' | / | / | ||||
3/16''-1/2'' | 6 | 3/16-1/4-5/16-3/8-7/16-7/8'' | 3 1/4'' | 1/4'' | ||||
3/16''-3/4'' | 10 | 3/16-1/4-5/16-3/8-7/16-1/2-9/16-5/8-11/16-3/4'' | / | 3/8'' | ||||
3/16''-7/8'' | 12 | 3/16-1/4-5/16-3/8-7/16-1/2-9/16-5/8-11/16-3/4-13/16- 7/8" | 3 1/4'' | 3/8'' | ||||
1/4''- 3/4'' | 9 | 1/4-5/16-3/8-7/16-1/2-9/16-5/8-11/16-3/4'' | 2 3/4'' | 3/8'' | ||||
1/4''-1 1/4'' | 17 | 1/4-5/16-3/8-7/16-1/2-9/16-5/8-11/16-3/4-13/16-7/8-15/16-1-1 1/16-1 1/8-1 3/16-1 1/4'' | / | / | ||||
1/4''-1 3/8'' | 10 | 1/4-3/8-1/2-5/8-3/4-7/8-1 7/32-1 1/4-1 3/8'' | 3 1/8'' | 1/2'' | ||||
5-16/-1'' | 9 | 5/16-1/2-9/16-5/8-11/16-3/4-13/16-7/8-15/16-1'' | 3 1/4'' | 3/8'' | ||||
3/8''-1/2'' | 2 | 3/8-1/2'' | 1 7/8'' | 1/4'' | ||||
3/8'' | 1 | 3/8'' | 1 3/4'' | 1/4'' | ||||
7/16-1 1/8'' | 11 | 7/16-1/2-9/16-5/8-11/16-3/4-13/16-7/8-15/16-1-1 1/16-1 1/8'' | / | / | ||||
1/2'' | 1 | 1/2'' | 1 7/8'' | 1/4'' | ||||
9/16-1'' | 8 | 9/16-5/8-11/16-3/4-13/16-7/8-15/16-1'' | / | / | ||||
3/4-1 3/8'' | 11 | 3/4-13/16-7/8-15/16-1-1 1/16-1 1/8-1 3/16-1 1/4-1 5/16-1 3/8'' | / | 1/2'' | ||||
13/16-1 3/8'' | 10 | 13/16-7/8-15/16-1-1 1/16-1 1/8-1 3/16-1 1/4-1 5/16-1 3/8'' | / | / | ||||
7/8''-1 1/8'' | 2 | 7/8-1 1/8'' | 3 1/8'' | 3/8'' | ||||
7/8'' | 1 | 7/8'' | 2 5/8'' | 3/8'' | ||||
1 1/8'' | 1 | 1 1/8'' | 3 1/8'' | 1/2'' | ||||
1 7/32'' | 1 | 1 7/32'' | 3 1/4'' | 1/2'' |
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