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SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 1
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 2
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 3
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 4
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 5
SMART STEP EU+ HSS twist drill bit DIN 338 - DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM - 6

SMART STEP EU+ HSS twist drill bit DIN 338

Twist drill bit SMART STEP EU+ HSS DIN 338
DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D9,5MM
ZEBRA SMART STEP

Art.-no. 0624910950
EAN 4099618281013
All versions

Prices for customers after login
SMART STEP EU+ HSS twist drill bit DIN 338

Art.-no. 0624910950

Prices for customers after login
Quantity
PU
x 1 pcs

Exclusively for trade customers

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The original SMART STEP twist drill bit with patent-pending stepped drill bit tip geometry with extremely uneven pitch (from dia. 2.5 mm) for even faster, more comfortable drilling with unrivalled precision and service life

Extremely unequal pitch (EU+)


  • Up to 50 % longer service life

  • Significantly more comfortable drilling with less vibration, even less effort required and perfect tool guidance (up to 60 % less torque)

  • Up to 20 % lower energy consumption

  • Up to 15 % faster drilling progress


Precise, circular drilling in a wide range of materials including wood, plastic and acrylic, without tearing or splintering



Extremely comfortable drilling


  • Precise tapping without running off centre

  • Simple boring or enlarging of an existing drill hole

  • Angled drilling possible

  • No rattling or catching - even in thin-walled material

  • Burr-free hole exit


Significantly faster and more energy-efficient drilling compared to conventional HSS twist drill bits



Ideal for drilling out rivets and stud bolts



The first twist drill bit to enable precise, hand-guided drilling up to dia. 20 mm without pre-drilling; even enables precise holes up to dia. 26.5 mm without pre-drilling when used in a box column drill


  • Shank reduced to dia. 12.7 mm from > 13.0 mm bore diameter for use in all standard three-jaw drill chucks


3-flat shank (from dia. 4 mm)


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

  • Optimal power transmission

  • Protects the drill chuck from damage

  • Little effort required to loosen and tighten the drill chuck


Available exclusively from Würth



Product packaging made of 100 % PCR (recycled plastic from household waste), 100 % recyclable and Cradle to Cradle Certified® Bronze

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

  • The steps of the innovative point geometry drill gradually to achieve the required diameter. To achieve this, the chip is broken into small individual chips by several main cutting edges, thus ensuring optimal chip removal. The result is highly precise, circular drilling.

  • The use of several cutting edges at the same time enables very fast, comfortable working and a long service life.
Product information

Würth Catalogue

Datasheets(X)

Certificates/ Documents

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Application area
  • Ideal for use in cordless drills as well as on hand-held, box column and pillar drills

  • For use in steel up to 1,000 N/mm², cast iron, aluminium, copper, brass, bronze, hard and soft wood, plastic (e.g. acrylic glass, HPL, screen printing plates) and composite materials (e.g. plastic profiles with steel core)

  • High drill hole quality and significantly longer service life compared to conventional twist wood drill bits.

  • Perfect for rivet holes, drilling out stud bolts, drilling sheet metal and thin-walled profile materials (e.g. aluminium/window profiles) and for drilling on round and sloping surfaces, such as pipes.

  • Ideal for high-precision, comfortable and fast working in solid materials (e.g. in steel with strength of up to 1,000 N/mm², aluminium and plastics).

  • Ideal for large drill hole diameters

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 338 / 5xD

Diameter (Ø)

9.5 mm

Length (l1)

125 mm

Chip flute length (l2)

81 mm

Drill tip length (l3)

11.1 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

Suitable for milling-drilling centre (points system)

0 - not applicable

Self-centring

Yes

Suitable for tensile strength up to

1000 N/mm²

Material of sub-group

General structural steels, Non-alloyed tempering steels, Cast iron, Ductile iron, Malleable cast iron, Magnesium alloys, Copper, low-alloyed, Brass, short-chipping, Brass, long-chipping, Plastics, thermoset, Plastics, thermoplastic

For dia. 16.0-20.0
Material designation Tensile strength from dia. 16.0 from dia. 20.0
≤ dia. 8 > dia. 8 ≤ dia. 10 > dia. 10
vc n f n f n f n f
from to from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 716 1074 0,03 358 537 0,04 573 859 0,035 286 430 0,042
Unalloyed hardened steels ≤ 850 N/mm² 18 27 716 1074 0,03 358 537 0,04 573 859 0,035 286 430 0,042
Low-alloy hardened steels ≤ 850 N/mm² 18 27 716 1074 0,03 358 537 0,04 573 859 0,035 286 430 0,042
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 597 915 0,028 298 457 0,038 477 732 0,031 238 366 0,04
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 597 915 0,028 298 457 0,038 477 732 0,031 238 366 0,04
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 398 597 0,028 199 298 0,038 318 477 0,031 159 238 0,04
Nitriding steels ≤ 1,200 N/mm² 10 15 398 597 0,028 199 298 0,038 318 477 0,031 159 238 0,04
Tool steels ≤ 1,200 N/mm² 10 15 398 597 0,028 199 298 0,038 318 477 0,031 159 238 0,04
High-speed steels ≤ 1,200 N/mm² 10 15 398 597 0,028 199 298 0,038 318 477 0,031 159 238 0,04
Cast iron ≤ 350 HB 15 23 597 915 0,028 298 457 0,038 477 732 0,031 238 366 0,04
Nodular graphite and malleable iron ≤ 350 HB 15 23 597 915 0,028 298 457 0,038 477 732 0,031 238 366 0,04
Aluminium ≤ 600 N/mm² 35 45 1393 1791 0,03 696 895 0,04 1114 1433 0,035 557 716 0,042
Thermosetting plastics 15 23 597 915 0,03 298 457 0,04 477 732 0,035 238 366 0,042
Thermoplastic plastics 15 23 597 915 0,03 298 457 0,04 477 732 0,035 238 366 0,042
Soft and light wood 21 30 836 1194 0,033 418 597 0,044 668 955 0,038 334 477 0,046
Compact and hard wood 18 27 716 1074 0,032 358 537 0,041 573 859 0,036 286 430 0,043
For dia. 10.0-12.5
Material designation Tensile strength from dia. 10.0 from dia. 12.5
≤ dia. 6 > dia. 6 ≤ dia. 6.5 > dia. 6.5
vc n f n f n f n f
from to from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 955 1433 0,027 573 859 0,035 881 1322 0,027 458 687 0,038
Unalloyed hardened steels ≤ 850 N/mm² 18 27 955 1433 0,027 573 859 0,035 881 1322 0,027 458 687 0,038
Low-alloy hardened steels ≤ 850 N/mm² 18 27 955 1433 0,027 573 859 0,035 881 1322 0,027 458 687 0,038
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 796 1220 0,025 477 732 0,031 734 1126 0,025 382 585 0,035
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 796 1220 0,025 477 732 0,031 734 1126 0,025 382 585 0,035
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 530 796 0,025 318 477 0,031 489 734 0,025 254 382 0,035
Nitriding steels ≤ 1,200 N/mm² 10 15 530 796 0,025 318 477 0,031 489 734 0,025 254 382 0,035
Tool steels ≤ 1,200 N/mm² 10 15 530 796 0,025 318 477 0,031 489 734 0,025 254 382 0,035
High-speed steels ≤ 1,200 N/mm² 10 15 530 796 0,025 318 477 0,031 489 734 0,025 254 382 0,035
Cast iron ≤ 350 HB 15 23 796 1220 0,025 477 732 0,031 734 1126 0,025 382 585 0,035
Nodular graphite and malleable iron ≤ 350 HB 15 23 796 1220 0,025 477 732 0,031 734 1126 0,025 382 585 0,035
Aluminium ≤ 600 N/mm² 35 45 1857 2388 0,027 1114 1433 0,035 1714 2204 0,027 891 1146 0,038
Thermosetting plastics 15 23 796 1220 0,027 477 732 0,035 734 1126 0,027 382 585 0,038
Thermoplastic plastics 15 23 796 1220 0,027 477 732 0,035 734 1126 0,027 382 585 0,038
Soft and light wood 21 30 1114 1592 0,03 668 955 0,038 1028 1469 0,03 535 764 0,041
Compact and hard wood 18 27 955 1433 0,03 573 859 0,036 881 1322 0,03 458 687 0,038
Key
vc = cutting speed [m/min]
f = feed [mm/r]
n = rotation speed [rpm]
The suggested cutting values are reference values and must be adapted to the respective conditions.
For dia. 24.0-26.5
Material designation Tensile strength from dia. 24.0 from dia. 26.5
≤ dia. 12 > dia. 12 ≤ dia. 12 > dia. 12
vc n f n f n f n f
from to from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 477 716 0,038 238 358 0,042 477 716 0,038 216 320 0,042
Unalloyed hardened steels ≤ 850 N/mm² 18 27 477 716 0,038 238 358 0,042 477 716 0,038 216 320 0,042
Low-alloy hardened steels ≤ 850 N/mm² 18 27 477 716 0,038 238 358 0,042 477 716 0,038 216 320 0,042
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 398 610 0,035 199 305 0,04 398 610 0,035 180 276 0,04
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 398 610 0,035 199 305 0,04 398 610 0,035 180 276 0,04
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 265 398 0,035 132 199 0,04 265 398 0,035 120 180 0,04
Nitriding steels ≤ 1,200 N/mm² 10 15 265 398 0,035 132 199 0,04 265 398 0,035 120 180 0,04
Tool steels ≤ 1,200 N/mm² 10 15 265 398 0,035 132 199 0,04 265 398 0,035 120 180 0,04
High-speed steels ≤ 1,200 N/mm² 10 15 265 398 0,035 132 199 0,04 265 398 0,035 120 180 0,04
Cast iron ≤ 350 HB 15 23 398 610 0,035 199 305 0,04 398 610 0,035 180 276 0,04
Nodular graphite and malleable iron ≤ 350 HB 15 23 398 610 0,035 199 305 0,04 398 610 0,035 180 276 0,04
Aluminium ≤ 600 N/mm² 35 45 928 1194 0,038 464 597 0,042 928 1194 0,038 420 540 0,042
Thermosetting plastics 15 23 398 610 0,038 199 305 0,042 398 610 0,038 180 276 0,042
Thermoplastic plastics 15 23 398 610 0,038 199 305 0,042 398 610 0,038 180 276 0,042
Soft and light wood 21 30 557 796 0,041 278 398 0,046 557 796 0,041 252 360 0,046
Compact and hard wood 18 27 477 716 0,038 238 358 0,043 477 716 0,038 216 320 0,043
Cutting values for SMART STEP EU+ HSS DIN 338 twist drill bit
For dia. 1.0-2.5
Material designation Tensile strength from dia. 1.0 from dia. 2.0 from dia. 2.5
vc n f n f n f
from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 5732 8598 0,01 2866 4299 0,012 2292 3439 0,015
Unalloyed hardened steels ≤ 850 N/mm² 18 27 5732 8598 0,01 2866 4299 0,012 2292 3439 0,015
Low-alloy hardened steels ≤ 850 N/mm² 18 27 5732 8598 0,01 2866 4299 0,012 2292 3439 0,015
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 4777 7324 0,008 2388 3662 0,01 1910 2929 0,012
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 4777 7324 0,008 2388 3662 0,01 1910 2929 0,012
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 3184 4777 0,008 1592 2388 0,01 1273 1910 0,012
Nitriding steels ≤ 1,200 N/mm² 10 15 3184 4777 0,008 1592 2388 0,01 1273 1910 0,012
Tool steels ≤ 1,200 N/mm² 10 15 3184 4777 0,008 1592 2388 0,01 1273 1910 0,012
High-speed steels ≤ 1,200 N/mm² 10 15 3184 4777 0,008 1592 2388 0,01 1273 1910 0,012
Cast iron ≤ 350 HB 15 23 4777 7324 0,008 2388 3662 0,01 1910 2929 0,012
Nodular graphite and malleable iron ≤ 350 HB 15 23 4777 7324 0,008 2388 3662 0,01 1910 2929 0,012
Aluminium ≤ 600 N/mm² 35 45 11146 14331 0,01 5573 7165 0,012 4458 5732 0,015
Thermosetting plastics 15 23 4777 7324 0,01 2388 3662 0,012 1910 2929 0,015
Thermoplastic plastics 15 23 4777 7324 0,01 2388 3662 0,012 1910 2929 0,015
Soft and light wood 21 30 6688 9554 0,012 3344 4777 0,014 2675 3821 0,017
Compact and hard wood 18 27 5732 8598 0,01 2866 4299 0,013 2292 3439 0,015
For dia. 6.3-8.0
Material designation Tensile strength from dia. 6.3 from dia. 8.0
vc n f n f
from to from to from to
General structural steels ≤ 850 N/mm² 18 27 909 1364 0,027 716 1074 0,03
Unalloyed hardened steels ≤ 850 N/mm² 18 27 909 1364 0,027 716 1074 0,03
Low-alloy hardened steels ≤ 850 N/mm² 18 27 909 1364 0,027 716 1074 0,03
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 758 1162 0,025 597 915 0,028
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 758 1162 0,025 597 915 0,028
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 505 758 0,025 398 597 0,028
Nitriding steels ≤ 1,200 N/mm² 10 15 505 758 0,025 398 597 0,028
Tool steels ≤ 1,200 N/mm² 10 15 505 758 0,025 398 597 0,028
High-speed steels ≤ 1,200 N/mm² 10 15 505 758 0,025 398 597 0,028
Cast iron ≤ 350 HB 15 23 758 1162 0,025 597 915 0,028
Nodular graphite and malleable iron ≤ 350 HB 15 23 758 1162 0,025 597 915 0,028
Aluminium ≤ 600 N/mm² 35 45 1769 2274 0,027 1393 1791 0,03
Thermosetting plastics 15 23 758 1162 0,027 597 915 0,03
Thermoplastic plastics 15 23 758 1162 0,027 597 915 0,03
Soft and light wood 21 30 1061 1516 0,03 836 1194 0,033
Compact and hard wood 18 27 909 1364 0,03 716 1074 0,032
For dia. 3.15-5.0
Material designation Tensile strength from dia. 3.15 from dia. 4.0 from dia. 5.0
vc n f n f n f
from to from to from to from to
General structural steels ≤ 850 N/mm² 18 27 1819 2729 0,017 1433 2149 0,02 1146 1719 0,025
Unalloyed hardened steels ≤ 850 N/mm² 18 27 1819 2729 0,017 1433 2149 0,02 1146 1719 0,025
Low-alloy hardened steels ≤ 850 N/mm² 18 27 1819 2729 0,017 1433 2149 0,02 1146 1719 0,025
Unalloyed hardened steels ≤ 1,000 N/mm² 15 23 1516 2325 0,015 1194 1831 0,018 955 1464 0,021
Low-alloy hardened steels ≤ 1,000 N/mm² 15 23 1516 2325 0,015 1194 1831 0,018 955 1464 0,021
Alloyed hardened steels ≤ 1,200 N/mm² 10 15 1011 1516 0,015 796 1194 0,018 636 955 0,021
Nitriding steels ≤ 1,200 N/mm² 10 15 1011 1516 0,015 796 1194 0,018 636 955 0,021
Tool steels ≤ 1,200 N/mm² 10 15 1011 1516 0,015 796 1194 0,018 636 955 0,021
High-speed steels ≤ 1,200 N/mm² 10 15 1011 1516 0,015 796 1194 0,018 636 955 0,021
Cast iron ≤ 350 HB 15 23 1516 2325 0,015 1194 1831 0,018 955 1464 0,021
Nodular graphite and malleable iron ≤ 350 HB 15 23 1516 2325 0,015 1194 1831 0,018 955 1464 0,021
Aluminium ≤ 600 N/mm² 35 45 3538 4549 0,016 2786 3582 0,02 2229 2866 0,025
Thermosetting plastics 15 23 1516 2325 0,016 1194 1831 0,02 955 1464 0,025
Thermoplastic plastics 15 23 1516 2325 0,016 1194 1831 0,02 955 1464 0,025
Soft and light wood 21 30 2123 3033 0,018 1672 2388 0,023 1338 1910 0,028
Compact and hard wood 18 27 1819 2729 0,018 1433 2149 0,022 1146 1719 0,027
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