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4-20mm Metric Two Flute Step Down High Speed Steel Stepper Cone Drill Bit
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4-20mm Metric Two Flute Step Down High Speed Steel Stepper Cone Drill Bit

Material: High Speed Steel
Shank Type : 3/8'' Hex
Flute Type: Straight Groove
Coating: Brignt
Number of Holes: 9
Size: 4-20mm

  • SUBORUI

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Product Description

  • Step drill bit with 2mm increments

  • Perfect for drilling into steel, brass, copper, aluminium, wood and plastics

  • Manufactured from good quality high-speed steel, correctly hardened for a longer life

  • Drill steps marked at graduations: 4, 6, 8, 10, 12, 14, 16, 18, 20m

Application
HSS Grade
Iron
Aluminum
Carbon Steel
Tile
Plastic
Stainless Steel
4241
YES
YES
NO
NO
YES
NO
4341YESYESYESNOYESYES
6542(M2)
YES
YES
YES
NO
YES
GOOD
M35 (Co 5%)
YES
YES
YES
NO
YES
VERY GOOD


DESCRIPTION OF HSSCWMoCrVCoSiMnPS

%%%%%%%%%%
W4Mo3Cr4V(4341)0.88-0.983.5-4.52.5-3.53.8-4.41.2-1.8
0.5-1.20.2-0.4<=0.03<=0.03
W6Mo5Cr4V2(M2)0.8-0.95.5-6.754.5-5.53.8-4.41.75-2.2-0.2-0.40.2-0.4<=0.03<=0.03
W6Mo5Cr4V2Co5(M35)0.9-0.955.5-6.54.5-5.53.8-4.41.75-2.24.5-5.50.2-0.40.2-0.4<=0.03<=0.03
W2Mo9Cr4V2Co8(M42)1.05-1.151.15-1.859.0-10.03.5-4.250.95-1.257.75-8.750.15-0.650.15-0.4<=0.02<=0.025



Metric sizeSIZE RANGEINCREMENTSTEP NO.SHANK
4-121mm96mm
4-122mm56mm
4-202mm98mm
4-222mm108mm
5-352-3mm1313mm
6-121mm78mm
6-182mm710mm
6-202mm810mm
6-302mm1310mm
6-302-3mm1210mm
6-382-3mm1210mm
9-363mm1010mm
10-201mm1110mm
10-455mm813mm
12-201mm910mm
14-242mm613mm
20-301mm1113mm
20-342mm813mm
Imperial size1/8"-1/2"1/32"131/4"
3/16"-1/2"1/16"61/4"
1/4"-3/4"1/16"93/8"
3/16"-7/8"1/16"123/8"
9/16"-1"1/16"81/2"
13/16"-1-3/8"1/16"101/2"
1/4"-1-3/8"1/8"10

1/2

"


Custom OEM/ODM Solutions

  • Product Customization:

    • Submit your design drawings or physical samples – we engineer precision twist drills tailored to your specifications.

    • Optimize existing tools for enhanced durability, cutting speed, or cost efficiency.

Packaging Design

  • Retail-Ready Solutions:

    • Custom-branded boxes, multi-language manuals, or eco-friendly packaging.

    • Design-to-delivery support for seamless market entry.


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