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Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 1
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 2
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 3
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 4
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 5
Twist drill bit HSS DIN 1869 R2 SMART STEP - DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5 - 6

Twist drill bit HSS DIN 1869 R2 SMART STEP

Twist drill bit HSS DIN 1869 R2 SMART STEP
DRL-TWST-MET-DIN1869-HSS-SMARTSTEP-D8,5
ZEBRA SMART STEP

Art.-no. 0624950850
EAN 4065746542852
All versions

Prices for customers after login
Twist drill bit HSS DIN 1869 R2 SMART STEP

Art.-no. 0624950850

Prices for customers after login
Quantity
PU
x 3 pcs

Exclusively for trade customers

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The extra-long deep hole drill with unique SMART STEP technology for high-precision circular drilling in hand-guided use in soft and hardwood, composite materials, steel up to 1000 N/mm², cast iron, aluminium, plastic, copper, brass and bronze

The first extra-long twist drill bit with stepped drill bit tip geometry



Precise, circular holes without centre-punching



Up to 100 % faster than conventional extra-long HSS drill bits



Extremely comfortable drilling


  • Eliminates pre-drilling despite the extra-long design, precise spot drilling

  • Prevents the tool from running off-centre even during particularly deep drilling

  • Significantly less effort required when drilling compared to conventional extra-long twist drill bits

  • Simple drilling or enlarging of an existing drill hole


3-flat shank


  • No spinning in the drill chuck: faster, more comfortable working

  • Optimal power transmission

  • Protects the drill chuck from damage

  • Minimal effort required to loosen and tighten the drill chuck


Product packaging made from 100 % PCR (recycled plastic from household waste) and 100 % recyclable



Available exclusively from Würth

Notice

For blind holes, please note the extended drill tip (see dimension l3)!

Product information

Würth Catalogue

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Application area
  • Ideal for drilling thin-walled composite materials, e.g. in window construction (plastic profiles with steel core)

  • High quality of drill holes and significantly longer service life compared to conventional wood boring bits.

  • Perfect for cordless drill drivers as well as handheld and pillar drill and drill presses

  • Universally suited for smooth as well as rounded and uneven surfaces
Instructions

For optimum drilling progress and to avoid jamming, use “pecking cycles” for large drilling depths.

Suitable for machine type

Drill, Cordless screwdrivers, Pedestal drilling machine

Material to be processed

Steel, Cast iron, Non-ferrous metal, Wood, Hardwood

Quality

ZEBRA-Premium

Standard / drilling depth

DIN 1869 / 25xD

Design

Overlong

Diameter (Ø)

8.5 mm

Length (l1)

305 mm

Chip flute length (l2)

210 mm

Drill tip length (l3)

7.6 mm

Shank style

3-face shank

Surface

Multiple refined

Cutting material

HSS

Service life (points system)

3 of 4 points

Drilling speed (point system)

4 of 4 points

Bore hole quality (point system) ( )

4 of 4 points

Versatility (points system)

3 of 4 points

Drilling behaviour (point system)

4 of 4 points

Suitable for drill (points system)

4 of 4 points

Suitable for cordless drills (points system)

4 of 4 points

Suitable for upright drilling machine (points system)

4 of 4 points

Self-centring

Yes

Suitable for tensile strength up to

1000 N/mm²

Material of sub-group

General structural steels, Non-alloyed tempering steels, Alloyed tempering steels, Nitriding steels, Tool steels, High-speed steels, Cast iron, Ductile iron, Malleable cast iron, Aluminium, Aluminium alloys, Aluminium wrought alloys, Aluminium casting alloys (<10% silicon), Magnesium alloys, Copper, low-alloyed, Brass, short-chipping, Brass, long-chipping, Bronze, short-chipping, Bronze, long-chipping, Plastics, thermoset, Plastics, thermoplastic, Plastics, aramide-fibre reinforced, Plastics, glass/carbon-fibre-reinforced

Cutting parameters for twist drill bit HSS DIN 1869 R2 SMART STEP
For dia. 4.0–6.0
Material designation Tensile strength From dia. 4.0 From dia. 5.0 From dia. 6.0
vc n f n f n f
from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 1433 2149 0,020 1146 1719 0,025 955 1433 0,027
Unalloyed heat-treated steels ≤ 850 N/mm² 18 27 1433 2149 0,020 1146 1719 0,025 955 1433 0,027
Low-alloy heat-treated steels ≤ 850 N/mm² 18 27 1433 2149 0,020 1146 1719 0,025 955 1433 0,027
Unalloyed heat-treated steels ≤ 1000 N/mm² 15 23 1194 1831 0,018 955 1464 0,021 796 1221 0,025
Low-alloy heat-treated steels ≤ 1000 N/mm² 15 23 1194 1831 0,018 955 1464 0,021 796 1221 0,025
Alloyed heat-treated steels ≤ 1000 N/mm² 10 15 796 1194 0,018 636 955 0,021 531 796 0,025
Nitriding steels ≤ 1000 N/mm² 10 15 796 1194 0,018 636 955 0,021 531 796 0,025
Tool steels ≤ 1000 N/mm² 10 15 796 1194 0,018 636 955 0,021 531 796 0,025
High-speed steels ≤ 1000 N/mm² 10 15 796 1194 0,018 636 955 0,021 531 796 0,025
Cast iron ≤ 350 HB 15 23 1194 1831 0,018 955 1464 0,021 796 1221 0,025
Spheroidal graphite and malleable iron ≤ 350 HB 15 23 1194 1831 0,018 955 1464 0,021 796 1221 0,025
Aluminium ≤ 600 N/mm² 35 45 2786 3582 0,020 2229 2866 0,025 1857 2388 0,027
Plastics, duroplastic 15 23 1194 1831 0,020 955 1464 0,025 758 1162 0,027
Plastics, thermoplastic 15 23 1194 1831 0,020 955 1464 0,025 758 1162 0,027
Softwood 21 30 1672 2388 0,023 1338 1910 0,028 1114 1592 0,030
Hardwood 18 27 1433 2149 0,022 1146 1719 0,027 955 1433 0,030
Legend
vc = cutting speed [m/min]
f = feed [mm/r]
n = speed [rpm]
The suggested cutting values are reference values and must be adapted to the respective conditions.
For dia. 8.0–13.0
Material designation Tensile strength From dia. 8.0 From dia. 10.0 From dia. 13.0
vc n f n f n f
from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 716 1074 0,03 573 859 0,035 440 661 0,038
Unalloyed heat-treated steels ≤ 850 N/mm² 18 27 716 1074 0,03 573 859 0,035 440 661 0,038
Low-alloy heat-treated steels ≤ 850 N/mm² 18 27 716 1074 0,03 573 859 0,035 440 661 0,038
Unalloyed heat-treated steels ≤ 1000 N/mm² 15 23 597 915 0,028 477 732 0,031 367 563 0,035
Low-alloy heat-treated steels ≤ 1000 N/mm² 15 23 597 915 0,028 477 732 0,031 367 563 0,035
Alloyed heat-treated steels ≤ 1000 N/mm² 10 15 398 597 0,028 318 477 0,031 245 367 0,035
Nitriding steels ≤ 1000 N/mm² 10 15 398 597 0,028 318 477 0,031 245 367 0,035
Tool steels ≤ 1000 N/mm² 10 15 398 597 0,028 318 477 0,031 245 367 0,035
High-speed steels ≤ 1000 N/mm² 10 15 398 597 0,028 318 477 0,031 245 367 0,035
Cast iron ≤ 350 HB 15 23 597 915 0,028 477 732 0,031 367 563 0,035
Spheroidal graphite and malleable iron ≤ 350 HB 15 23 597 915 0,028 477 732 0,031 367 563 0,035
Aluminium ≤ 600 N/mm² 35 45 1393 1791 0,03 1114 1433 0,035 857 1102 0,038
Plastics, duroplastic 15 23 597 915 0,03 477 732 0,035 367 563 0,038
Plastics, thermoplastic 15 23 597 915 0,03 477 732 0,035 367 563 0,038
Softwood 21 30 836 1194 0,033 668 955 0,038 514 734 0,041
Hardwood 18 27 716 1074 0,032 573 859 0,036 440 661 0,038
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