HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-20MM)

HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-20MM) - 1

HSS SMART STEP stepped twist drill bit - DRL-STEP-SPRL-SMARTSTEP-(D4-20MM) - 2

HSS SMART STEP stepped twist drill bit

Name: HSS SMART STEP stepped twist drill bit
Brand: Würth
SKU: 0694450421

Stepped twist drill bit HSS SMART STEP
DRL-STEP-SPRL-SMARTSTEP-(D4-20MM)
ZEBRA SMART STEP

Art.-no. 0694450421

EAN 4065746562218

All versions

Specification

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

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

Technical information

Min./max. drill diameter	4.0-20 mm
Shank diameter	1/4 in
Shaft length	26 mm
Length	73.5 mm
Shank style	Hexagon bit holder, shape E, DIN3126
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	v_c	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
Unalloyed hardened steels	≤ 900 N/mm²	19	1000	150	1000	150
Low-alloy hardened steels	≤ 700 N/mm²	23	1200	200	1200	190
Low-alloy hardened steels	≤ 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	v_c	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
Unalloyed quenched and tempered steels	≤ 900 N/mm²	19	1200	200	1000	200
Low-alloy quenched and tempered steels	≤ 700 N/mm²	23	1500	250	1200	240
Low-alloy quenched and tempered steels	≤ 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
v_c = 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	v_c	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
Unalloyed hardened steels	≤ 900 N/mm²	19	1000	150
Low-alloy hardened steels	≤ 700 N/mm²	23	1200	180
Low-alloy hardened steels	≤ 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	v_c	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
Unalloyed quenched and tempered steels	≤ 900 N/mm²	19	1700	200	1300	200
Low-alloy quenched and tempered steels	≤ 700 N/mm²	23	2000	250	1600	250
Low-alloy quenched and tempered steels	≤ 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	v_c	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
Unalloyed quenched and tempered steels	≤ 900 N/mm²	19	1500	500	1500	300
Low-alloy quenched and tempered steels	≤ 700 N/mm²	23	1800	600	1800	360
Low-alloy quenched and tempered steels	≤ 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

Documents

Product information

Würth Catalogue

Datasheets(X)

Certificates/ Documents

Accessory

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