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HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM)
HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) - 1
HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) - 2
HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) - 3
HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-12MM) - 4

HSS SMART STEP stepped twist drill bit

Stepped twist drill bit HSS SMART STEP
DRL-STEP-SPRL-SMARTSTEP-(D4-12MM)
ZEBRA SMART STEP

Art.-no. 0694450412
EAN 4065746562164
All versions

Prices for customers after login
HSS SMART STEP stepped twist drill bit

Art.-no. 0694450412

Prices for customers after login
Quantity
PU
x 1 pcs

Exclusively for trade customers

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Stepped drill bit with unique SMART STEP technology and dynamically curved rake between the individual step transitions for extremely fast and comfortable use in all common materials with a material thickness of up to 3.5 mm.

Dynamically curved cutting edge geometry between each step transition


  • Significantly longer service life compared to conventional stepped drill bits

  • Significantly faster drilling compared to conventional stepped drill bits

  • Minimal effort required

  • Quiet, perfectly controlled drilling process

  • Greatly reduced formation of burrs


SMART STEP technology


  • Up to 3x faster spot drilling compared to conventional stepped drill bits

  • Precision spot drilling without centring or centre-punching

  • No warping of sheet metal

  • Simple drilling or enlarging of an existing drill hole

  • No rattling or catching in the material

  • Precise, circular holes without tearing or splintering


Deep-ground spiral flute


Excellent chip removal



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

Application area
  • The ideal tool for machining sheet metal.

  • Centring, spot drilling, boring and deburring of sheet metal, tubes and profiles in one operation, for use on both hand drills and stationary equipment.

  • Ideal for use in electrical trade, plumbing and heating systems, automotive workshops, mechanical engineering, switch cabinet manufacturing or container and equipment engineering.
Instructions
  • Ensure that there is sufficient coolant/lubricant

  • Observe the rotation speed table

  • Do not push during boring. The stepped drill bit automatically retracts into the sheet metal

Min./max. drill diameter

4-12 mm

Shank diameter

6 mm

Shaft length

24 mm

Length

67.5 mm

Shank style

3-face shank

Surface

Uncoated

Material to be processed

Steel, Cast metal, Non-ferrous metal, Plastic, Wood

Cutting values
For dia. 6.0-37.0 and dia. 6.0-39.0
Material designation Tensile strength vc n
dia. 6.0-37.0
art. 		dia. 6.0-39.0
art.
Tapping (1st drilling step) to Tapping (1st drilling step) to
Steels
General structural steels ≤ 700 N/mm² 23 1200 200 1200 190
Unalloyed hardened steels ≤ 700 N/mm² 23 1200 200 1200 190
≤ 900 N/mm² 19 1000 150 1000 150
Low-alloy hardened steels ≤ 700 N/mm² 23 1200 200 1200 190
≤ 900 N/mm² 19 1000 150 1000 150
Alloyed hardened steels ≤ 1,200 N/mm² 18 950 150 950 140
Nitriding steels ≤ 1,200 N/mm² 18 950 150 950 140
Tool steels ≤ 850 N/mm² 18 950 150 950 140
High-speed steels ≤ 1,200 N/mm² 18 950 150 950 140
Cast metals
Cast iron ≤ 350 HB 15 1000 120 1000 120
Spheroidal graphite and malleable iron ≤ 350 HB 15 1000 120 1000 120
Non-ferrous metals
Aluminium ≤ 450 N/mm² 22 1200 190 1200 180
Aluminium alloys ≤ 450 N/mm² 22 1200 190 1200 180
Low-alloy copper ≤ 400 N/mm² 19 1000 150 1000 150
Short-chipping brass ≤ 850 N/mm² 22 1200 190 1200 180
Long-chipping brass ≤ 850 N/mm² 22 1200 190 1200 180
Plastics
Thermosetting plastics 19 1000 150 1000 150
Thermoplastic plastics 19 1000 150 1000 150
Cutting values
For dia. 5.0-29.0 and dia. 6.0-30.0
Material designation Tensile strength vc n
dia. 5.0-29.0
art. 		dia. 6.0-30.0
art.
Drilling (1st drilling step) to Drilling (1st drilling step) to
Steels
General structural steels ≤ 700 N/mm² 23 1500 250 1200 240
Unalloyed quenched and tempered steels ≤ 700 N/mm² 23 1500 250 1200 240
≤ 900 N/mm² 19 1200 200 1000 200
Low-alloy quenched and tempered steels ≤ 700 N/mm² 23 1500 250 1200 240
≤ 900 N/mm² 19 1200 200 1000 200
Alloyed quenched and tempered steel ≤ 1,200 N/mm² 18 1100 200 950 190
Nitriding steels ≤ 1,200 N/mm² 18 1100 200 950 190
Tool steels ≤ 850 N/mm² 18 1100 200 950 190
High-speed steels ≤ 1,200 N/mm² 18 1100 200 950 190
Cast metals
Cast iron ≤ 350 HB 15 950 160 1000 150
Spheroidal graphite and malleable iron ≤ 350 HB 15 950 160 1000 150
Non-ferrous metals
Aluminium ≤ 450 N/mm² 22 1400 240 1200 230
Aluminium alloys ≤ 450 N/mm² 22 1400 240 1200 230
Low-alloy copper ≤ 400 N/mm² 19 1200 200 1000 200
Short-chipping brass ≤ 850 N/mm² 22 1400 240 1200 230
Long-chipping brass ≤ 850 N/mm² 22 1400 240 1200 230
Plastics
Thermosetting plastics 19 1200 200 1000 200
Thermoplastic plastics 19 1200 200 1000 200
Key
vc = cutting speed [m/min]
n = rotation speed [rpm]
The suggested cutting values are reference values and must be adapted to the respective conditions.
Cutting values
dia. 6.0-40.5
Material designation Tensile strength vc n
dia. 6.0-40.5
art.
Tapping (1st drilling step) to
Steels
General structural steels ≤ 700 N/mm² 23 1200 180
Unalloyed hardened steels ≤ 700 N/mm² 23 1200 180
≤ 900 N/mm² 19 1000 150
Low-alloy hardened steels ≤ 700 N/mm² 23 1200 180
≤ 900 N/mm² 19 1000 150
Alloyed hardened steels ≤ 1,200 N/mm² 18 950 140
Nitriding steels ≤ 1,200 N/mm² 18 950 140
Tool steels ≤ 850 N/mm² 18 950 140
High-speed steels ≤ 1,200 N/mm² 18 950 140
Cast metals
Cast iron ≤ 350 HB 15 1000 120
Spheroidal graphite and malleable iron ≤ 350 HB 15 1000 120
Non-ferrous metals
Aluminium ≤ 450 N/mm² 22 1200 170
Aluminium alloys ≤ 450 N/mm² 22 1200 170
Low-alloy copper ≤ 400 N/mm² 19 1000 150
Short-chipping brass ≤ 850 N/mm² 22 1200 170
Long-chipping brass ≤ 850 N/mm² 22 1200 170
Plastics
Thermosetting plastics 19 1000 150
Thermoplastic plastics 19 1000 150
Art. no. Number of steps Diameter of the drilling area [mm]
0694450330 14 3.5/5.5/7.5/9.5/11.5/13.5/15.5/17.5/19.5/21.5/23.5/25.5/27.5/29.5
0694450412 9 4.0/5.0/6.0/7.0/8.0/9.0/10.0/11.0/12.0
0694450420 9 4.0/6.0/8.0/10.0/12.0/14.0/16.0/18.0/20.0
0694450421 9 4.0/6.0/8.0/10.0/12.0/14.0/16.0/18.0/20.0
0694450429 13 4.5/6.5/8.5/10.5/12.5/14.5/16.5/18.5/20.5/22.5/24.5/26.5/28.5
0694450529 13 5.0/7.0/9.0/11.0/13.0/15.0/17.0/19.0/21.0/23.0/25.0/27.0/29.0
0694450630 13 6.0/8.0/10.0/12.0/14.0/16.0/18.0/20.0/22.0/24.0/26.0/28.0/30.0
0694450637 12 6.0/9.0/12.5 (PG7)/15.2 (PG9)/18.6 (PG11)/20.4 (PG13.5)/22.5 (PG16)/26.0/28.3 (PG21)/30.5/34.0/37.0 (PG29)
0694450639 12 6.0/9.0/12.0/15.0/18.0/21.0/24.0/27.0/30.0/33.0/36.0/39.0
0694450640 16 6.5/8.5/10.5/12.5/14.5/16.5/18.5/20.5/23.5/25.5/28.0/30.5/32.5/35.5/38.5/40.5
Cutting values
For dia. 3.5-29.5 and dia. 4.5-28.5
Material designation Tensile strength vc n
dia. 3.5-29.5
art. 		dia. 4.5-28.5
art.
Drilling (1st drilling step) to Drilling (1st drilling step) to
Steels
General structural steels ≤ 700 N/mm² 23 2000 250 1600 250
Unalloyed quenched and tempered steels ≤ 700 N/mm² 23 2000 250 1600 250
≤ 900 N/mm² 19 1700 200 1300 200
Low-alloy quenched and tempered steels ≤ 700 N/mm² 23 2000 250 1600 250
≤ 900 N/mm² 19 1700 200 1300 200
Alloyed quenched and tempered steel ≤ 1,200 N/mm² 18 1600 160 1250 200
Nitriding steels ≤ 1,200 N/mm² 18 1600 160 1250 200
Tool steels ≤ 850 N/mm² 18 1600 160 1250 200
High-speed steels ≤ 1,200 N/mm² 18 1600 160 1250 200
Cast metals
Cast iron ≤ 350 HB 15 1350 160 1050 160
Spheroidal graphite and malleable iron ≤ 350 HB 15 1350 160 1050 160
Non-ferrous metals
Aluminium ≤ 450 N/mm² 22 2000 240 1500 240
Aluminium alloys ≤ 450 N/mm² 22 2000 240 1500 240
Low-alloy copper ≤ 400 N/mm² 19 1700 200 1300 200
Short-chipping brass ≤ 850 N/mm² 22 2000 240 1500 240
Long-chipping brass ≤ 850 N/mm² 22 2000 240 1500 240
Plastics
Thermosetting plastics 19 1700 200 1300 200
Thermoplastic plastics 19 1700 200 1300 200
Cutting values
For dia. 4.0-12.0 and dia. 4.0-20.0
Material designation Tensile strength vc n
dia. 4.0-12.0
art. 		dia. 4.0-20.0
art.
Drilling (1st drilling step) to Drilling (1st drilling step) to
Steels
General structural steels ≤ 700 N/mm² 23 1800 600 1800 360
Unalloyed quenched and tempered steels ≤ 700 N/mm² 23 1800 600 1800 360
≤ 900 N/mm² 19 1500 500 1500 300
Low-alloy quenched and tempered steels ≤ 700 N/mm² 23 1800 600 1800 360
≤ 900 N/mm² 19 1500 500 1500 300
Alloyed quenched and tempered steel ≤ 1,200 N/mm² 18 1400 470 1400 280
Nitriding steels ≤ 1,200 N/mm² 18 1400 470 1400 280
Tool steels ≤ 850 N/mm² 18 1400 470 1400 280
High-speed steels ≤ 1,200 N/mm² 18 1400 470 1400 280
Cast metals
Cast iron ≤ 350 HB 15 1200 400 1200 250
Spheroidal graphite and malleable iron ≤ 350 HB 15 1200 400 1200 250
Non-ferrous metals
Aluminium ≤ 450 N/mm² 22 1700 580 1700 350
Aluminium alloys ≤ 450 N/mm² 22 1700 580 1700 350
Low-alloy copper ≤ 400 N/mm² 19 1500 500 1500 300
Short-chipping brass ≤ 850 N/mm² 22 1700 580 1700 350
Long-chipping brass ≤ 850 N/mm² 22 1700 580 1700 350
Plastics
Thermosetting plastics 19 1500 500 1500 300
Thermoplastic plastics 19 1500 500 1500 300

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