Режущие и зажимные инструменты Hoffmann Group 2026 - страница 67

GBP 57 90º HSS DIN h8 h8 1897 2 118° Stub stepped drills for tapping holes, 90° countersink Very sturdy. Tight concentricity tolerances between drill ⌀ and counterbore ⌀ guarantee exact alignment. 11 7020 – Special surface treatment, resulting in reduced tendency to edge build-up and improved chip evacuation. ​ 11 7020 Advantage: Hole and countersink are produced in one operation and precisely aligned. Application: Particularly suitable for NC machines due to high positional accuracy, excellent centring properties and great sturdiness. The preceding centring operation can thus often be omitted. For thread tapping drill holes to DIN 336 sheet 1 with 90° countersink. In the following ​ 11 7040 operation, the tap therefore does not have to cut into the sharp edge of the hole. L LC L1 ⌀ D1 ⌀ DS ⌀ D2 Suitable for/ vc [m/min] ISO code N N N P P P P P H H H H H M M S K N ​ ​ ​ ​ ​ 11 7020 45 40 30 25 25 80 ● ● 11 7040 56 50 50 37 31 12 10 31 80 ● ● for threads 11 7020 11 7040 ⌀ D1 h8 ⌀ D2 h8 L1 Lc L ⌀ Ds 11C 11C Stub stepped drill HSS < 750 N f 90° vaporised TiAlN mm mm mm mm mm mm mm/rev. M3 eShop eShop 2.5 3.4 8.8 20 52 3.4 0.03 M4 eShop eShop 3.3 4.5 11.4 24 58 4.5 0.03 M5 eShop eShop 4.2 5.5 13.6 28 66 5.5 0.07 M6 eShop eShop 5 6.6 16.5 31 70 6.6 0.07 M8 M10 eShop eShop eShop eShop 6.8 8.5 9 11 21 25.5 40 47 84 95 9 11 0.1 0.1 11 M12 eShop eShop 10.2 13.5 30 54 107 13.5 0.16 90º HSS DIN h8 h8 1897 2 118° Stub subland drill for through holes, 90° (for countersunk screws) Very sturdy. Tight concentricity tolerances between drill ⌀ and counterbore ⌀ guarantee exact alignment. 11 7120 – Special surface treatment, resulting in reduced tendency to edge build-up and improved chip evacuation. ​ 11 7120 Application: Particularly suitable for NC machines due to high positional accuracy, excellent centring properties and great sturdiness. The preceding centring operation can thus often be omitted. For through holes for screws to DIN-ISO 273 and countersinks to DIN 74, sheet 1 form A, fine ​ 11 7140 version. For screws to ISO 2009, 2010, 7046, 7047 (DIN 963, 964, 965 and 966). L LC L1 ⌀ D1 ⌀ DS ⌀ D2 Suitable for/ vc [m/min] ISO code N N N P P P P P H H H H H M M S K N ​ ​ ​ ​ ​ 11 7120 45 40 30 25 25 80 ● ● 11 7140 56 50 50 37 31 12 10 31 80 ● ● for screws 11 7120 11 7140 ⌀ D1 h8 ⌀ D2 h8 L1 Lc L ⌀ Ds 11C 11C Stub subland drill HSS < 750 N f 90° vaporised TiAlN mm mm mm mm mm mm mm/rev. M3 eShop eShop 3.2 6 9 28 66 6 0.03 M4 eShop eShop 4.3 8 11 37 79 8 0.03 M5 eShop eShop 5.3 10 13 43 89 10 0.07 M6 eShop eShop 6.4 11.5 15 47 95 11.5 0.07 M8 eShop eShop 8.4 15 19 56 111 15 0.1 M10 eShop eShop 10.5 19 23 64 127 19 0.1 67