Режущие и зажимные инструменты Hoffmann Group 2026 - страница 86

GBP 57 Solid h6 h6 HPC carbide Standard 2 DIN x 128° 6535 HA 40 bar GARANT Master Steel Micro solid carbide drill High-performance micro-drill foruniversal material use, focussing on steel processing. Maximum process reliability due to exactly matched tools within the overall system and expanded guide chamfer. Drilling of very small diameters down to the maximum depth after creating a pilot hole. Optimum compromise between core diameter and flute size for optimum chip evacuation – even with long-chipping materials. The increased metal removal rates and longer tool life ensure an economical drilling process, even with very small hole diameters combined with a large L/D ratio. Note: For reliable use of the micro-drills from 8×D, a pilot hole of at least 4×D is required using the micro-pilot drill 121223. For vertical machining and flat workpiece surfaces, a pilot hole can be dispensed with from DC = ⌀ 1 mm up to a length of 12×D. Please always ensure that the pilot hole is free from chips before using the subsequent drilling tool. We recommend setting a 90° counterbore with a suitable NC spotting drill after the pilot hole has been completed. For critical applications (e.g. highest possible production accuracy, minimal burr formation, reduced coolant pressure), reduce the feed rate of the tool by 50% before entering and exiting the material. Long-chipping materials may require chips to be evacuated in steps of 3×D each by moving the drill back slightly at pilot hole depth. Please make sure that you use a suitable tool clamping device (shrink-fit chuck, hydraulic clamping chuck) with a radial run-out of less than 0.003 mm, a sufficiently high coolant pressure (at least 30 bar), as well as sufficiently fine filtration of the cooling medium (DC <⌀ 2 mm with filter ≤ 0.010 mm; DC <⌀ 3 mm filter ≤ 0.020 mm). The specified L/D ratio gives the minimum achievable depth of hole with the respective micro-drill. Flute length LC = L2 + 1.5 × DC. L 12×D 12 1226 LC L2 ⌀ DC ⌀ DS 20×D 12 1228 12 Suitable for/ vc [m/min] ISO code N N N P P P P P H H H H M M S K N ​ ​ ​ ​ ​ ​ 12 1228 50 50 70 60 50 42 42 30 25 58 50 ● ● 12 1231 60 50 45 40 35 30 50 40 ● ● ⌀ DC 12 1228 12 1231 L2 L ⌀ Ds 10F 10F INOX h6 GARANT Master Steel Micro < 1100 N < 900 N solid carbide drill, f f plain shank DIN 6535 HA 20×D DIN 6535 HA 30×D 12 1228 12 1231 12 1228 12 1231 ​ ​ ​ mm AlCrN AlCrN mm mm mm mm mm mm/rev. mm/rev. 0,8 eShop eShop 16.4 24.4 51 59 3 0.028 0.015 0,85 eShop eShop 18.5 27.5 53 62 3 0.028 0.015 0,9 eShop eShop 18.4 27.5 53 62 3 0.028 0.015 0,95 eShop eShop 20.5 30.6 55 65 3 0.028 0.015 1 eShop eShop 20.5 30.5 55 65 3 0.028 0.015 1,05 eShop eShop 22.6 33.6 57 68 3 0.034 0.018 1,1 eShop eShop 22.5 33.6 57 68 3 0.034 0.018 1,15 eShop eShop 24.6 36.7 59 71 3 0.034 0.018 1,2 eShop eShop 24.6 36.6 59 71 3 0.034 0.018 1,25 eShop eShop 26.7 39.7 61 74 3 0.034 0.018 1,3 eShop eShop 26.6 39.7 61 74 3 0.045 0.024 1,35 eShop eShop 28.7 42.8 63 78 3 0.045 0.024 1,4 eShop eShop 28.7 42.7 63 78 3 0.045 0.024 1,45 eShop eShop 30.8 45.8 66 81 3 0.045 0.024 1,5 eShop eShop 30.7 45.8 66 81 3 0.045 0.024 1,55 eShop eShop 32.8 48.9 68 84 3 0.07 0.04 1,6 eShop eShop 32.8 48.8 68 84 3 0.07 0.04 1,65 eShop eShop 34.9 51.9 70 87 3 0.07 0.04 1,7 eShop eShop 34.8 51.9 70 87 3 0.07 0.04 1,75 eShop eShop 36.9 55 72 90 3 0.07 0.04 1,8 eShop eShop 36.9 54.9 72 90 3 0.07 0.04 1,85 eShop eShop 39 58 74 93 3 0.07 0.04 1,9 eShop eShop 38.9 58 74 93 3 0.07 0.04 1,95 eShop eShop 41 61.1 76 96 3 0.07 0.04 2 eShop eShop 41 61 76 96 3 0.07 0.04 2,05 eShop eShop 43.1 64.1 78 99 3 0.095 0.06 2,1 eShop eShop 43 64.1 78 99 3 0.095 0.06 2,2 eShop eShop 45.1 67.1 80 102 3 0.095 0.06 2,3 eShop eShop 47.1 70.2 82 106 3 0.095 0.06 2,4 eShop eShop 49.2 73.2 85 109 3 0.095 0.06 2,5 eShop eShop 51.2 76.3 87 112 3 0.095 0.06 2,6 eShop eShop 53.3 79.3 89 115 3 0.115 0.08 2,7 eShop eShop 55.3 82.3 91 118 3 0.115 0.08 2,8 eShop eShop 57.4 85.4 93 121 3 0.115 0.08 2,9 eShop eShop 59.4 88.5 95 124 3 0.115 0.08 3 eShop eShop 61.3 91.5 97 127 3 0.115 0.08 86