Datasheet
B/109
M-S D – HSS DM O5
More precise hole diameter through cylindrical steps. Hole deburring through the next step.
Application area:
The ideal tool for sheet metal forming, for the electrical industry, HVAC or the
common engineering or the switchboard industry.
Suitable for all materials such as nonferrous metals, stainless steel sheets,
thermoplastic and thermosetting plastics, as well as for steel sheets up to a
max. material thickness of 6 mm.
With the Multi-Step Drills, sheet metals can be centered, drilled and subse-
quently deburred in one work step.
n A break of the drill tip mostly occurs through high feed forces at the
start of the drilling operation. Multi-step drills with fixed drill tips are
worthless then. A broken center drill in an ALFRA multi-step drill can be
easily replaced. This more than compensates for the higher price.
n Each stage is equipped with a radially adjusted relief grinding corre-
sponding to its diameter.
n Each stage is provided with an axial relief grinding and a relief angle on
its cutting edge.
n All step diameters are laser marked on the tool.
Benefits of multi-step drills with keyway and 3 cutting edges:
n The keyway allows the drill to make a chipping cut during drilling for
better chip removal.
n The special keyway geometry, arranged around the drill, makes for a lon-
ger cutting edge compared to the usual straight groove and noticeably
easier cutting.
n Spiral cut chip spaces guarantee an absolute running smoothness and a
high cutting capacity.
Tip:
The tool life can be considerably prolonged by using of ALFRA Cutting
Spray or ALFRA Coolant Stick.
Advantages of TiAlN hard coating:
n Suitable for use on very hard materials (VA).
n Offers optimal tool life with the same use at the highest cutting speeds.
n Very high microhardness HV 0.05 of 3200 – so that the blue-black hard
coating is more than 20% harder than conventional gold-yellow TIN
coating.
n Maximum working temperature: 800°C.
Description Shank Ø Prod.-No.
AMS 10.0 08080
For general machine construction, drills circular
holes in metals up to 4 mm thick,
through application with hand
drills, indispensable on the work-site.
3 chip spaces, spiral grooved, replaceable center drill
Steps Ø 9 - 12 - 15 - 18 - 21 - 24 - 27 - 30 - 33 - 36 mm
(Step „40” is for deburring)
AMS – TiAlN coated 10.0 08081
3 chip spaces, spiral grooved, replaceable center drill
TiAlN coated
Steps Ø 9 - 12 - 15 - 18 - 21 - 24 - 27 - 30 - 33 - 36 mm
(Step „40” is for deburring)
AM 1 12.0 08002
Steps Ø 25 - 28 - 31 - 34 - 37 - 40 - 43 - 46 - 49 - 52 - 55 - 58 mm
PVD 10.0 08003
For the electrical industry, matched to holes
for armoured conduit thread clearance holes, saves
considerable time when producing
borings for PG
Steps Ø PG 7 - PG 9 - PG 11 - PG 13 - PG 16 - PG 21 - 33 mm - PG 29 - 40 mm
Prod.-No. 08080 n Prod.-No. 08081 n
Prod.-No. 08002 n 6 Prod.-No. 08003 n 6
n Exchangeable center drills
6 4 chipspaces
4 or 6 mm
Burr removal,
Countersinking
Boring
B