Общий каталог FANAR 2021 - страница 289

κκκκκ κ i Technical information 4.3. Types of machine tap chamfers Symbol Sketch Chamfer length presented in Anglethe quantity of the thread coils 6÷8 P A 6÷8P 5° 3,5÷5,5 P B 3,5 ÷ 5,5 P 8° 2÷3 P C 2÷3P 17° 3,5÷5 P D 3,5 ÷ 5 P 8° 1,5÷2 P E 1,5 ÷ 2 P 23° 1P F 1P 35° 4.4. Types of Machine Tap Chip Flutes Straight Flutes In combination with the chamfer A or D applied for the through holes and with the chamfer E or F for the blind holes. Tap with the chamfer C can be used for both types of holes. It is recommended for materials giving a short chip. The grooves evacuate only some of the chips, which slowly move along the axis. The tap should not be used for deep blind holes or materials giving a long chip. The length of threads, which can be made - up to ca 1.5xD 12 286