Step drill made of high-speed tool steel HSS-Co M35 according to DIN 338 (domestic marking of steel - Р6М5К5).
Complies with GOST 10902-77.
Spiral flute for chip ejection.
The high content of cobalt Co in the alloy (about 5%) significantly increases the performance and durability of the drill, even compared to a titanium surface coating. Doping with cobalt also increases red hardness (the ability to withstand overheating without deterioration).
Additional hardening coating with titanium nitride.
The step drill is intended for drilling of sheet steel, non-ferrous metals, plastic.
Made of tool steel, the drill is coated with titanium nitride (yellow coating) to increase the resource.
The shank of the drill is hexagonal 1/4" (6.35 mm), corresponds to the installation size of the bit holder of the screwdriver.
Step diameters in 1 mm increments:
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4 mm
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5 mm
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6 mm
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7 mm
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8 mm
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9 mm
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10 mm
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11 mm
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12 mm
Characteristics:
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drilling diameter range: 4 - 12 mm
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diameter pitch: 1 mm
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number of steps: 9
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groove: spiral
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maximum workpiece thickness: 3 mm
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working part length: 50 mm
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shank length: 24mm
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drill material: tool steel
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wear-resistant coating: titanium nitride
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weight: 22 g
![Cobalt spiral Step drill 4-12mm [pitch 1mm] grade M35](/files/pic/sverlo/044357/0443571-1-s.jpg)
![Cobalt spiral Step drill 4-12mm [pitch 1mm] grade M35](/files/pic/sverlo/044357/0443571-1-b.jpg)
![Cobalt spiral Step drill 4-12mm [pitch 1mm] grade M35](/files/pic/sverlo/044357/044357-1-b.jpg)
![Cobalt spiral Step drill 4-12mm [pitch 1mm] grade M35](/files/pic/sverlo/044357/044357-2-b.jpg)
The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
