Solid carbide precision drills for H7 fit H7 Drilling and reaming in a single operation Cutting chisel edge with high centring accuracy - due to

Solid carbide precision drills for H7 fit H7 Drilling and reaming in a single operation. Cutting chisel edge with high centring accuracy - due to a strong core and special point geometry. Particularly high alignment accuracy due to 4 guide chamfers. Very tight manufacturing tolerances with H7 fit can be produced without additional reaming. HB and HE shanks available without surcharge. Form HB order Version Advantage Note No. 122790 + 129100HB. n-7 Form HE order No. 122790 + 129100HE. (See catalogue page 18 for ordering example). Solid carbide DIN 6537 hjni 6535 hahbhe 25 bar HPC Whistle-Notch shank DIN 6535 HE 122790+ 1291OOHE Suitable for/ vc m/min Alu plastics oa&c Alu cast >1096 Si <500 N <750 N <900 N 1 <1100 N <1400 N Sc Jhrc INOX <900 N INOX >900 N Ti >850 N GG(G) CuZn Graphite GRP CRP Uni '-2 max min Air ISO code N P H K N 12 2790- 120 100 85 60 35 30 1 O 0 mm 12 2790 ifb Earn lit i mm J 1 I h6 mm <900 N 0 mm 12 2790 jftoEinnt 1 mm Uot mm r h6 mm <900 N Solid carbide HPC drill plain shank DIN 6535 HA H7 Solid carbide HPC drill plain shank DIN 6535 HA H7 f mm/rev f mm/rev TiAIN 3,98 36 74 6 0.16 6,01 44 82 6 0.22 3,99 36 74 6 0.16 6.02 44 82 6 0.22 4H7 36 74 6 0.16 7,98 53 91 8 0.22 4,01 36 74 6 0.16 7,99 53 91 8 0.22 4.02 36 74 6 0.16 8H7 53 91 8 0.22 4,98 44 82 6 0.16 8,01 53 91 8 0.22 4,99 44 82 6 0.16 8.02 53 91 8 0.22 5H7 44 82 6 0.16 9,98 61 103 10 0.28 5,01 44 82 6 0.16 9,99 61 103 10 0.28 5,02 44 82 6 0.16 10H7 61 103 10 0.28 5,98 44 82 6 0.16 10,01 61 103 10 0.28 5,99 44 82 6 0.16 10.02 61 103 10 0.28 6H7 44 82 6 0.22 12H7 71 118 12 0.34 AEaianC Solid carbide drill 180° Solid xmJ carbide Standard 5xD m7 Version Special point geometry for generating 180° flat-bottomed holes. Low radial forces even when spot drilling on faces with up to 15° slope. Flute geometry for optimum chip evacuation. With 4 guide chamfers to stabilise the drill in the hole. Advantage The 180° point angle permits drilling and counterboring in a single operation. Recommendation When using the solid carbide 180° drill it is absolutely essential for process reliability when spot drilling on flat surfaces, to drill a pilot hole 1 x D using pilot drill No. 12 2736 or to reduce the feed rate f up to a drilling depth of 0.5xD. when spot drilling on sloping surfaces up to max. 15° to reduce the feed rate f to 25% of the stated value. After spot drilling, the normal feed rate value can be used. Plain shank DIN 6535 HA 122793 Note HB and HE shanks available without surcharge. n 1 Form HB order No. 122793 + 129100HB. Form HE order No. 122793 + 129100HE. (See catalogue page 18 for ordering example). Weldon shank DIN 6535 HB 122793 + 129100HB Whistle-Notch shank DIN 6535 HE 12 2793 + 12 9100H E Pilot drill Cutter with corner chamfer. 122736 Suitable for/ vc m/min Alu plastics Alu cast >10% Sf <500 N <750 N <900 N FstH <1100 N 1 1 <1400 N s <60 HRC <5c INOX <900 N INOX >900 N TI >850 N GG(G) CuZn Graphite GRP CRP Uni max min Air ISO code N P H K N 12 2793- 85 75 60 45 45 40 90 1 0 m7 mm 122793 I jtfoGarait11 J 1 T h6 mm <900N 0 m7 mm 122793 I j&Gannt-1 mm J 1 T h6 mm <900 N Solid carbide drill plain shank DIN 6535 HA 180° Solid carbide drill plain shank DIN 6535 HA 180° f mm/rev f mm/rev TiAIN 4 36 74 6 0.08 10 61 103 10 0.14 5 44 82 6 0.09 11 69 116 12 0.16 6 44 82 6 0.11 15 81 131 16 0.18 6,5 53 91 8 0.11 18 91 141 18 0.20 8 53 91 8 0.13 20 99 151 20 0.23 Main catalogue Hoffmann Group 46