
GBP 57 HSS DIN 3 335 D 90° Countersink 90° Countersinks radially relief ground. Chip flutes are ground from solid up to size 31. Chip angle varies with the countersink ⌀ for optimum chip formation. Countersink point and circumference are relief ground and cut easily. 15 0390 – High-precision countersink, produced with tight manufacturing tolerances similar to DIN 335-D. 15 0395 – Economy countersink version. 15 0390 15 0396 – High-precision countersink for considerable performance improvement. Note: For countersink bits with shank 6.3 mm (1/4 inch) see Group 67. 15 0395 15 0396 Relief ground L ⌀ DC MK Suitable for/ 15 vc [m/min] ISO code N N N P P P P P H H H H H M M S N N 15 0390/0395 70 33 28 27 27 ● ○ 15 0396 25 34 32 32 80 ● ○ External ⌀ Dc 15 0390 15 0395 15 0396 smallest L MT for countersunk for countersunk 12M 11M 11M countersink ⌀ for screws ISO 2009, screws DIN 7991 holes from 2010, 7046, 7047 < 500 N f High-precision High-precision Countersink countersink countersink 90° mm TiN mm mm mm/rev. 16,5 eShop eShop – 3.2 85 1 – M8 0.14 19 eShop – – 3.5 100 2 M10 – 0.14 20,5 eShop eShop – 3.5 100 2 – M10 0.16 23 eShop – – 3.8 106 2 M12 – 0.16 25 eShop eShop eShop 3.8 106 2 – M12 0.2 26 eShop – – 4 106 2 M14 – 0.2 28 eShop – – 4 112 2 – M14 0.2 30 eShop eShop – 4.2 112 2 M16 – 0.2 31 eShop eShop eShop 4.2 112 2 – M16 0.25 34 eShop eShop – 4.5 118 2 M18 M18 0.25 37 eShop eShop eShop 4.8 118 2 M20 M20 0.25 40 eShop eShop eShop 10 140 3 – – 0.25 50 eShop eShop eShop 14 150 3 – – 0.25 63 eShop eShop eShop 16 180 4 – – 0.35 80 eShop eShop – 22 190 4 – – 0.35 100 eShop eShop – 28 200 4 – – 0.35 209