Conical countersink yellow/blue ring HSS bit 90° short
Conical countersink HSS bit 90° short
CNTSNK-CONI-MA-HSS-BIT-90DGR-D8,3MM
ZEBRA
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Burr- and chatter-free countersinking and deburring
Precision tapered countersink with three cutting edges, precision-ground
Optimised geometry for hand-guided use
Less effort and improved countersinking quality and chip removal compared to conventional tapered countersinks
Standardised 1/4 inch hexagon shank
- No slipping in the drill chuck, suitable for bit holders
- Rapid change between countersinking and screwing possible
Product packaging made of 100 % PCR (recycled plastic from household waste), 100 % recyclable and Cradle to Cradle Certified® Bronze
Datasheets(X)
Material to be processed | Non-ferrous metal, Steel |
Quality | ZEBRA-Premium |
Spot-facer diameter (d1) | 8.3 mm |
Shank diameter (d2) | 1/4 in |
Tip diameter (d3) | 2.0 mm |
Length (l1) | 31 mm |
Number of cutting edges (Z) | 3 PCS |
Cutting material | HSS |
Countersink angle | 90 Degree |
Surface | Plain |
Shank style | Hexagon |
Service life (points system) | 2 of 4 points |
Countersinking speed (point system) | 2 of 4 points |
Countersinking quality (point system) | 3 of 4 points |
Versatility (points system) | 2 of 4 points |
Countersinking behaviour (point system) | 3 of 4 points |
Material of sub-group | General structural steels, Non-alloyed tempering steels, Alloyed tempering steels, High-speed steels, Nitriding steels, Tool steels, Cast iron, Ductile iron, Malleable cast iron, Aluminium, Aluminium wrought alloys, Aluminium alloys, White cast iron, Aluminium casting alloys (<10% silicon), Aluminium casting alloys (>10% silicon), Magnesium alloys, Copper, low-alloyed, Brass, short-chipping, Brass, long-chipping, Bronze, short-chipping, Bronze, long-chipping, Plastics, thermoset, Plastics, thermoplastic, Plastics, aramide-fibre reinforced, Plastics, glass/carbon-fibre-reinforced |
Legend | |
vc = cutting speed [m/min] | |
f = feed (mm/r) | |
The suggested cutting values are reference values and must be adapted to the respective conditions. |
Conical countersink nominal diameter d1 | For countersunk head screws | For countersunk head screws |
DIN EN ISO 10642 (formerly DIN 7991) | DIN EN ISO 2009, 2010, 7046, 7047 (formerly DIN 963, 964, 965, 966) | |
6.3 mm | M3 | M3 |
8.3 mm | M4 | - |
10.4 mm | M5 | M4, M5 |
12.4 mm | M6 | M6 |
16.5 mm | M8 | M8 |
20.5 mm | - | M10 |
For dia. 12.4–20.5 | |||||
Material designation | Tensile strength | vc | f | ||
Dia. 12.4 | Dia. 16.5 | Dia. 20.5 | |||
General structural steels | ≤ 500 N/mm² | 15,8 | 0,020 | 0,020 | 0,020 |
≤ 1000 N/mm² | 15,8 | 0,020 | 0,020 | 0,020 | |
Unalloyed heat-treated steels | ≤ 700 N/mm² | 15,8 | 0,020 | 0,020 | 0,020 |
≤ 850 N/mm² | 15,8 | 0,020 | 0,020 | 0,020 | |
≤ 1000 N/mm² | 15,8 | 0,020 | 0,020 | 0,020 | |
Alloyed heat-treated steels | ≤ 1000 N/mm² | 13 | 0,020 | 0,015 | 0,015 |
≤ 1400 N/mm² | 13 | 0,020 | 0,015 | 0,015 | |
Nitriding steels | ≤ 1000 N/mm² | 13 | 0,020 | 0,015 | 0,015 |
≤ 1400 N/mm² | 13 | 0,020 | 0,015 | 0,015 | |
Tool steels | ≤ 850 N/mm² | 13 | 0,020 | 0,015 | 0,015 |
≤ 1400 N/mm² | 13 | 0,020 | 0,015 | 0,015 | |
High-speed steels | ≤ 1400 N/mm² | 13 | 0,020 | 0,015 | 0,015 |
Cast iron | ≤ 240 HB | 15,8 | 0,020 | 0,020 | 0,020 |
≤ 350 HB | 15,8 | 0,020 | 0,020 | 0,020 | |
Spheroidal-graphite and malleable iron | ≤ 240 HB | 15,8 | 0,020 | 0,020 | 0,020 |
≤ 350 HB | 15,8 | 0,020 | 0,020 | 0,020 | |
Chilled cast iron | ≤ 350 HB | 15,8 | 0,020 | 0,020 | 0,020 |
Aluminium and aluminium alloys | ≤ 400 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Aluminium wrought alloys | ≤ 650 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Aluminium cast alloys ≤ 10 % Si | ≤ 600 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Aluminium cast alloys > 10 % Si | ≤ 600 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Magnesium alloys | ≤ 400 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Copper, low-alloyed | ≤ 500 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Brass, short-chipping | ≤ 600 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Brass, long-chipping | ≤ 600 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Bronze, short-chipping | ≤ 600 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Bronze, short-chipping | ≤ 850 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Bronze, long-chipping | ≤ 850 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Bronze, long-chipping | ≤ 1000 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
Plastics | ≤ 150 N/mm² | 21,8 | 0,020 | 0,020 | 0,020 |
For dia. 6.3–10.4 | |||||
Material designation | Tensile strength | vc | f | ||
Dia. 6.3 | Dia. 8.3 | Dia. 10.4 | |||
General structural steels | ≤ 500 N/mm² | 15,8 | 0,025 | 0,025 | 0,025 |
≤ 1000 N/mm² | 15,8 | 0,025 | 0,025 | 0,025 | |
Unalloyed heat-treated steels | ≤ 700 N/mm² | 15,8 | 0,025 | 0,025 | 0,025 |
≤ 850 N/mm² | 15,8 | 0,025 | 0,025 | 0,025 | |
≤ 1000 N/mm² | 15,8 | 0,025 | 0,025 | 0,025 | |
Alloyed heat-treated steels | ≤ 1000 N/mm² | 13 | 0,020 | 0,020 | 0,020 |
≤ 1400 N/mm² | 13 | 0,020 | 0,020 | 0,020 | |
Nitriding steels | ≤ 1000 N/mm² | 13 | 0,020 | 0,020 | 0,020 |
≤ 1400 N/mm² | 13 | 0,020 | 0,020 | 0,020 | |
Tool steels | ≤ 850 N/mm² | 13 | 0,020 | 0,020 | 0,020 |
≤ 1400 N/mm² | 13 | 0,020 | 0,020 | 0,020 | |
High-speed steels | ≤ 1400 N/mm² | 13 | 0,020 | 0,020 | 0,020 |
Cast iron | ≤ 240 HB | 15,8 | 0,025 | 0,025 | 0,025 |
≤ 350 HB | 15,8 | 0,025 | 0,025 | 0,025 | |
Spheroidal-graphite and malleable iron | ≤ 240 HB | 15,8 | 0,025 | 0,025 | 0,025 |
≤ 350 HB | 15,8 | 0,025 | 0,025 | 0,025 | |
Chilled cast iron | ≤ 350 HB | 15,8 | 0,025 | 0,025 | 0,025 |
Aluminium and aluminium alloys | ≤ 400 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Aluminium wrought alloys | ≤ 650 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Aluminium cast alloys ≤ 10 % Si | ≤ 600 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Aluminium cast alloys > 10 % Si | ≤ 600 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Magnesium alloys | ≤ 400 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Copper, low-alloyed | ≤ 500 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Brass, short-chipping | ≤ 600 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Brass, long-chipping | ≤ 600 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Bronze, short-chipping | ≤ 600 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Bronze, short-chipping | ≤ 850 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Bronze, long-chipping | ≤ 850 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Bronze, long-chipping | ≤ 1000 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
Plastics | ≤ 150 N/mm² | 21,8 | 0,025 | 0,025 | 0,025 |
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