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Description
Technical data Ø20 mm metal drill bits
| Technical data | |
|---|---|
| Working diameter of drill d | Ø20 mm |
| Overall length l1 | 205 mm |
| Flute length l2 | 140 mm |
| Shank diameter | 13 mm |
- Drill bit manufactured according to DIN-338
- Suitable for drilling materials up to 35 HRC
- 118° point angle suited to drilling steel and cast steel
- Made of the finest grade of HSS (High Speed Steel)
- Produces a hole with an h8 tolerance
- Low hole surface roughness
Cutting data for the Ø20 mm HSS NWKa reduced shank drill
| Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Spindle speed n [rpm] | Total feed rate [mm/min] |
|---|---|---|---|---|
| PSteel | 14-25 | 0.2 | 223 | 45 |
| KCast iron | 10-18 | 0.2 | 159 | 32 |
May be useful
Cutting parameters calculator
20 mm HSS DIN 338 reduced shank metal drill bit – a versatile tool conforming to the standard
Standardized 20 mm HSS drill conforming to DIN 338 with a reduced shank is a tool that meets European quality standards. The shank, reduced to a diameter of 13 mm, allows use in standard industrial tool holders without adapter sleeves. The DIN 338 standard ensures consistent tool geometry and material properties.
Specifications of the 20 mm Varel drill conforming to DIN 338
- Compliance with DIN 338 – standardized dimensions, a point angle of 118°, and helix geometry ensure predictable performance in various materials
- Shank reduced to 13 mm – eliminates diameter incompatibility when mounting in stationary and magnetic drilling machines
- Point angle 118° – universal geometry specified by DIN 338, optimal for most structural steels
- Ground cutting section – increases cutting edge life and improves the quality of the drilled holes
- HSS high-speed steel – material conforming to DIN 338 provides appropriate hardness and wear resistance
The DIN 338 standard defines precise drill specifications, ensuring interchangeability between products from different manufacturers. Reducing the shank to 13 mm increases the tool's versatility, allowing operation on machines with standard equipment without investing in additional accessories.
Frequently asked questions
The DIN 338 standard specifies the standard parameters of straight shank twist drills for metal: helix geometry, a point angle of 118°, and dimensions. This ensures compatibility and predictable performance of tools from different manufacturers that conform to this standard.
Diameters above 15 mm generate considerable heat during cutting, which can cause overheating and loss of sharpness. Using emulsion or oil significantly extends drill life and improves the quality of the drilled holes.
For mild structural steels, the optimal range is 220-300 rpm, while for higher-strength steels, 180-240 rpm should be used. These parameters are based on the material properties and drill diameter in accordance with machining principles.
Product accessories
Metal drill bit 20 long 254/166 HSS DIN 340
Reference: 0277 In stock > 10 items
€15.79
€19.42 brutto
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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