Режущие и зажимные инструменты Hoffmann Group 2026 - страница 215

GBP 57 ​ Modular counterboring system with internal coolant supply 15 6720 15 6730 15 6750 15 6720 Suitable for/ vc [m/min] ISO code N N N P P P P P H H H H H M M S N ​ ​ ​ ​ ​ ​ 15 6730 40 60 20 25 20 15 10 5 5 ● Modular counterboring system holder ​ Just 4 holder sizes cover a range from 5 mm to 66 mm (up to 85 mm available on request). Counterbores and solid pilots can be combined as required within one size, the solid pilot can be changed without removing the counterbore. Hardened and ground. Counterbore and pilot are clamped by one screw each, the counterbore is additionally protected against turning by means of a pin. 15 6720_1/20_2/25 Size 1/20; 2/25 – Plain Weldon shank to DIN 1835 B, with internal coolant supply. Application: For DIN counterbores, as well as with appropriate pilot / counterbore combinations for stepped holes or non-standard counterbores. For stepped through holes pilots are available ex works in 2 lengths so that these holes can be produced without a separate pilot hole drilling operation. Coolant transfer hole Size / shank 15 6720 Counterbore Bore ⌀ Hole length External ⌀ Length Length 16C size range H7 a b Modular counterboring system holder mm mm mm mm mm mm 15 6720 01/10 eShop 5–9 7 12 14 45 – 0/10 eShop 8 – 16.5 10 18 18 42 – 0MK1 eShop 8 – 16.5 10 18 18 42 49.5 1/12 eShop 14 – 27.5 14 20 24 55 – 1/20 eShop 14 – 27.5 14 20 24 55 – a 1MK2 eShop 14 – 27.5 14 20 24 55 61 b MT shank 2/25 eShop 24 – 66 22 28 34.5 75 – 2MK2 eShop 24 – 66 22 28 34.5 75 81 2MK3 eShop 24 – 66 22 28 34.5 75 81 Modular counterboring system ​ 15 180º HSS 2 3 4 Standard Very good machining and ideal chip evacuation due to spiral flutes. Easy to regrind. Counterbore is protected against turning in the holder. Application: For counterboring screw heads to DIN or by means of an appropriate combination of counterbore and 15 6730​ pilot to produce stepped holes or non-standard counterbores. Note: Counterbores available on request also in HSS with optional TIN coating and brazed-on carbide tips with form “T” ISO inserts. Size / coun- 15 6730 Z Cutter Shank ⌀ Size / coun- 15 6730 Z Cutter Shank ⌀ Size / coun- 15 6730 Z Cutter Shank ⌀ 16C 16C 16C terbore ⌀ length terbore ⌀ length terbore ⌀ length Modular Modular Modular counterbore counterbore counterbore mm ​ mm mm mm ​ mm mm mm ​ mm mm 01/5 eShop 2 8 7 1/15,5 eShop 3 22 14 2/28 eShop 4 24 22 01/5,5 eShop 2 8 7 1/16 eShop 3 22 14 2/29 eShop 4 24 22 01/6 eShop 2 8 7 1/16,5 eShop 3 22 14 2/30 eShop 4 24 22 01/6,5 eShop 2 8 7 1/17 eShop 3 22 14 2/31 eShop 4 24 22 01/7 eShop 2 8 7 1/17,5 eShop 3 22 14 2/32 eShop 4 24 22 01/8 eShop 2 8 7 1/18 eShop 3 22 14 2/33 eShop 4 24 22 0/8 eShop 3 14 10 1/18,5 eShop 3 22 14 2/34 eShop 4 24 22 0/8,5 eShop 3 14 10 1/19 eShop 3 22 14 2/35 eShop 4 24 22 0/9 eShop 3 14 10 1/19,5 eShop 3 22 14 2/36 eShop 4 24 22 0/9,5 eShop 3 14 10 1/20 eShop 3 22 14 2/38 eShop 4 24 22 0/10 eShop 3 14 10 1/20,5 eShop 3 22 14 2/39 (eShop) 4 24 22 0/10,5 eShop 3 14 10 1/21 eShop 3 22 14 2/40 eShop 4 24 22 0/11 eShop 3 14 10 1/21,5 (eShop) 3 22 14 2/42 eShop 4 24 22 0/11,5 eShop 3 14 10 1/22 eShop 3 22 14 2/43 (eShop) 4 24 22 0/12 eShop 3 14 10 1/22,5 eShop 3 22 14 2/44 (eShop) 4 24 22 0/12,5 eShop 3 14 10 1/23 eShop 3 22 14 2/45 eShop 4 24 22 0/13 eShop 3 14 10 1/24 eShop 3 22 14 2/46 eShop 4 24 22 0/13,5 eShop 3 14 10 1/24,5 eShop 3 22 14 2/48 (eShop) 4 24 22 0/14 eShop 3 14 10 1/25 eShop 3 22 14 2/50 eShop 4 24 22 0/14,5 eShop 3 14 10 1/25,5 (eShop) 3 22 14 2/52 (eShop) 4 24 22 0/15 eShop 3 14 10 1/26 eShop 3 22 14 2/55 (eShop) 4 24 22 0/15,5 eShop 3 14 10 1/27 eShop 3 22 14 2/56 (eShop) 4 24 22 0/16 eShop 3 14 10 1/27,5 eShop 3 22 14 2/58 (eShop) 4 24 22 0/16,5 eShop 3 14 10 2/24 eShop 4 24 22 2/60 (eShop) 4 24 22 1/14 eShop 3 22 14 2/25 eShop 4 24 22 2/66 (eShop) 4 24 22 1/14,5 eShop 3 22 14 2/26 eShop 4 24 22 ​ ​ ​ ​ ​ 1/15 eShop 3 22 14 2/27 eShop 4 24 22 ​ ​ ​ ​ ​ 215