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Twist drill HSS DIN 338 SMART STEP

Article No. 0624930400

Twist drill HSS DIN 338 SMART STEP DRL-TWST-MET-DIN338-HSS-SMARTSTEP-D4,0MM ZEBRA

€3.41 inc. VAT price per 1 PCS

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The manually operated high-performance drill with unique SMART STEP technology (from dia. 2.5 mm) for high-precision circular drill holes in steel up to 1000 N/mm², aluminium, plastic, non-ferrous metals, hard and soft wood.

The original SMART STEP: the first twist drill bit with step drill tip geometry (from dia. 2.5 mm)

Precise circular holes

Extremely convenient drilling

Saves pre-drilling, precise spot drilling without running off centre
Tilted drilling possible
Simple reboring or enlarging of an existing drill hole

Significantly quicker than conventional ground twist drill bits

Perfect for drilling out rivets and stud bolts

First twist drill bit to enable the handheld drilling of up to dia. 20 mm holes without predrilling; even enables precise holes up to dia. 26.5 mm without predrilling when used in a drill press.

Shank reduced to dia. 12.7 mm from > 13.0 mm nominal bore diameter for use in all common 3-jaw drill chucks

3-face shank (from dia. 4 mm)

No twisting in the drill chuck: faster, more comfortable working
Optimum transfer of force
Protection of the drill chuck from damage
Little effort required to open and close the drill chuck

Notice

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

Specification
Application
Technical Information
Documents

The original SMART STEP: the first twist drill bit with step drill tip geometry (from dia. 2.5 mm)

Precise circular holes

Extremely convenient drilling

Saves pre-drilling, precise spot drilling without running off centre
Tilted drilling possible
Simple reboring or enlarging of an existing drill hole

Significantly quicker than conventional ground twist drill bits

Perfect for drilling out rivets and stud bolts

First twist drill bit to enable the handheld drilling of up to dia. 20 mm holes without predrilling; even enables precise holes up to dia. 26.5 mm without predrilling when used in a drill press.

Shank reduced to dia. 12.7 mm from > 13.0 mm nominal bore diameter for use in all common 3-jaw drill chucks

3-face shank (from dia. 4 mm)

No twisting in the drill chuck: faster, more comfortable working
Optimum transfer of force
Protection of the drill chuck from damage
Little effort required to open and close the drill chuck

Notice

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

Application area

Perfect for rivet holes, drilling out stud bolts, for drilling sheet metal and thin-walled profile materials (e.g. aluminium/window profiles).

High quality of drill holes and significantly longer service life compared to conventional twist wood drill bits for drilling holes in wood.

Ideal for high-precision, comfortable and quick work in solid materials (e.g. in steel with strength of up to 1000 N/mm², aluminium and plastics).

Products specifications

Suitable for machine type	Drill<br>Cordless screwdrivers<br>Pedestal drilling machine
Material to be processed	Steel<br>Cast iron<br>Non-ferrous metal<br>Wood<br>Hardwood
Quality	ZEBRA-Premium
Standard / drilling depth	DIN 338 / 5xD
Diameter (Ø)	4 mm
Length (L1)	75 mm
Chip flute length (l2)	43 mm
Drill tip length (l3)	2.9 mm
Shank style	3-face shank
Surface	Multiple refined
Cutting material	HSS
Type	SMART STEP
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 sub-group	General structural steels<br>Non-alloyed tempering steels<br>Cast iron<br>Ductile iron<br>Malleable cast iron<br>Magnesium alloys<br>Copper, low-alloyed<br>Brass, short-chipping<br>Brass, long-chipping<br>Plastics, duroplastic<br>Plastics, thermoplastic

Würth Catalogue(2)

Catalogue page as PDF 1

Flip catalog

Products specifications

Suitable for machine type	Drill<br>Cordless screwdrivers<br>Pedestal drilling machine
Material to be processed	Steel<br>Cast iron<br>Non-ferrous metal<br>Wood<br>Hardwood
Quality	ZEBRA-Premium
Standard / drilling depth	DIN 338 / 5xD
Diameter (Ø)	4 mm
Length (L1)	75 mm
Chip flute length (l2)	43 mm
Drill tip length (l3)	2.9 mm
Shank style	3-face shank
Surface	Multiple refined
Cutting material	HSS
Type	SMART STEP
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 sub-group	General structural steels<br>Non-alloyed tempering steels<br>Cast iron<br>Ductile iron<br>Malleable cast iron<br>Magnesium alloys<br>Copper, low-alloyed<br>Brass, short-chipping<br>Brass, long-chipping<br>Plastics, duroplastic<br>Plastics, thermoplastic