Solid carbide HPC deep hole drill Garant Spiral fluted, with 4 guide chamfers and internal cooling channels New generation of high performance de

Solid carbide HPC deep hole drill Garant Spiral fluted, with 4 guide chamfers and internal cooling channels. New generation of high performance deep hole drills in the HPC range. With 135° point angle and special fg6 cutting edge tolerance for optimum generation of deep holes. High roundness and alignment accuracy of the deep hole. 123750 Note To achieve good process reliability with 40xD and 50xD deep-hole drills it is absolutely essential to drill a 6xD pilot hole with pilot drill No. 122736 and a 20xD co-pilot hole with co-pilot drill No. 123691. The generation of a pilot hole increases process reliability. See pages 92 / 93. See for further details. Versions with HB and HE shank available without surcharge. r Tl Form HB add product code No. 1291OOHB. Form HE add product code No. 129100HE. (See catalogue page 18 for ordering example). Pilot drill Co-pilot drill 122736 123691 Suitable for/ vc m/min Alu plastics G Alu cast >10% Si <500 N <750 N <900 N <1100 N <1400 N s PH 900 N Ti >850 N GG(G) CuZn I Uni ‘ES' JTT1 max min Air ISO code N P H K N 1 1 12 3740- 75 60 60 60 50 40 35 65 12 3750- 65 50 50 50 45 35 30 55 Garant The generation of a pilot hole is a necessary part of the production process. It ensures process reliability and reduces the costs. The minimum drilling depth (see table) depends on the desired deep hole depth. The use of a pilot hole eases the subsequent deep hole drilling operation and improves the life of the deep hole drill. Deep hole drill Pilot hole drilling (minimum drilling depth) 12xD 3xD (or centring with a 142° NC spatting drill) 16xD 4xD (or centring with a 142° NC spatting drill) 20xD 6xD 25xD 6xD 30XD 6xD 40xD 6xD and 20xD 50XD 6xD and 20xD 0fg6 mm 123740 12 3750 f I h5 mm I1 123740 mm 12 3750 mm ft; j&GmipI <900N Solid carbide HP plain DIN 6535 HA 40xD C deep-hole drill shank DIN 6535 HA 50xD u 12 3740 mm ot 123750 mm f mm/rev TiAIN 3 150 175 195 220 6 0.05 4 175 220 220 265 6 0.08 4,2 200 245 245 290 6 0.08 4,5 200 245 245 290 6 0.08 4,8 230 275 275 320 6 0.08 5 230 275 275 320 6 0.08 5,5 260 310 305 355 6 0.12 5,8 260 315 305 355 6 0.12 6 260 315 305 355 6 0.12 6,5 300 350 345 395 8 0.12 6,8 300 380 345 425 8 0.12 7 300 - 345 - 8 0.12 7,5 340 - 385 - 8 0.12 7,8 340 - 385 - 8 0.12 8 340 - 385 - 8 0.12 8,5 380 - 430 - 10 0.15 8,8 380 - 430 - 10 0.15 9 380 - 430 - 10 0.15 Requirements for the production process i Flat level face with Rz 10. i Use NC spot drilling for precise alignment of the hole, i Pilot hole with high roundness and corresponding hole 0 tolerance, i Correct insertion of the deep hole drill, i Correct choice of cutting parameters. i Correct stop point for the deep hole and correct withdrawal of the drill. See pages 92/93 and for further details. 102 Main catalogue Hoffmann Group 46 Version Solid carbide Standard fg6 135° DIN I 6535 HAHBHE 40 bar HPC