HSS step drills

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm

STB HSS 04-20/8

Item number:: 25201037
EAN:: 4007220165874

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm 1

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm 2

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm 3

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Ø Drill bit dia. range, Inch USA

0,138 - 1,57Inch 0,157 - 0,472Inch 0,157 - 0,787Inch 0,157 - 1,181Inch 0,157 - 1,535Inch 0,236 - 1,457Inch 0,275 - 1,28Inch 0,275 - 1,59Inch

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Technical information

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm

Dia. shank: 0,315 Inch
Dia. shank: 8 mm
Drill bit dia. range: 4 - 20 mm
Number, drill steps: 9 pcs.
Overall length: 2,953 Inch
Overall length: 75 mm
RPM, harte NE-Metalle: 320 - 2.400 RPM
RPM, rust and acid-resistant steels: 160 - 1.600 RPM
RPM, soft non-ferrous metals: 320 - 2.400 RPM
RPM, steels up to 220 HV (95 HB): 320 - 2.400 RPM
Version: HSS
Ø Drill bit dia. range, Inch USA: 0,157 - 0,787Inch
Packaging unit: 1 piece

Description

HSS step drills for drilling and deburring thin sheets, pipes and profiles made from various materials. To ensure reliable torque transmission, all step drills have a three-surface shaft.

Advantages

Drilling and deburring in a single step.
Completely smooth running and a high cutting performance.
The high-quality drill tip ensures easy centering and drilling.
The tool taper makes it easier to pull back from drilled plates.
Long and solid chips are quickly and easily removed similar to the chip produced by a spiral drill.
Built-up edges and cold welding on the blades are prevented.

Recommendations for use

Use HSS step drills on sheets, pipes and profiles with a maximum thickness of 4 mm.
Use cutting oil/compressed air as a coolant and lubricant in the case of step drills without a coating.

Safety notes

To ensure reliable torque transmission, step drills have a three-surface shaft.

Materials that can be worked: Aluminum; Brass; Bronze; Case-hardened steels; Chipboard; Copper; Fibre-reinforced thermosetting plastics (GRP, CRP); Fibre-reinforced thermosetting plastics (GRP, CRP) with a fibre content > 40 %; Fibre-reinforced thermosetting plastics (GRP, CRP) with a fibre content ≤ 40 %; Hard non-ferrous metal; Hardwood; Other; Other non-ferrous metals; Plastics; Soft aluminium alloys; Soft titanium alloys (tensile strength 500 N/mm²); Soft wood; Steel; Steel, cast steel; Steels up to 220 HV (< 95 HB); Steels up to 370 HV (< 38 HRC); Thermoplastics; Thermosetting plastics; Titanium; Titanium alloys; Tool steels; Tough aluminium alloys; Wood; Zinc

Applications: Countersinking; Deburring; Drilling

Drive types: Column drill; Power drill

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Included in

HSS step drill set SET STB HSS 3TLG

HSS step drills

Step drill HSS 9 drilling steps dia. 4-20 mm 3-surface shaft dia. 8 mm

STB HSS 04-20/8

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