Technical Information Widia TopThread 60° V-Thread Crest Turning Application Data NTC crest turning insert NTC crest turning insert for (P s 2mm) a

Technical Information Widia TopThread 60° V-Thread Crest Turning Application Data NTC crest turning insert NTC crest turning insert for (P s 2mm) and finer. for (P & 3mm) and coarser. NOTE NTC inserts automatically control root to crest dimensions. Therefore, in setting up threading operations with NTC inserts, check the O.D. or I.D. at the thread crest for correct dimensions. 60° V-Thread Crest Turning Application Data nose radius thread radius per insert on insert MIL-S-8879A Catalogue number Обозначение инструмента по каталогу (mm) (mm) NJ-3014R/L12 0,317/0,342 0,317/0,381 NJK-3008R/L20 0,190/0,215 0,190/0,0228 J thread note for catalogue The controlled root radius thread form (SAE8879C) is defined for the external thread only. To machine the corresponding internal thread, choose any insert that will cut a unified class 2B thread, then bore the minor diameter to size. Refer to SAE8879C and MIL-S-8879C and SAEAS8879D for the correct J thread minor diameter values. 60° V-Thread Application Data insert description insert D (mm) E (mm) recommended TPI recommended TP external internal external internal D E radius NT-1 1,90 1,11 - 24-12 - 1,00-2,00 / NT-2 28,70 1,90 36-8 20-7 0,70-3,00 1,25-3,50 NT-2-K 28,70 1,90 36-8 20-7 0,70-3,00 1,25-3,50 NTF-2 15,75 1,01 44-14 24-12 0,60-1,75 1,00-2,00 NT- NTP- NTK-2 15,75 1,01 44-14 24-12 0,60-1,75 1,00-2,00 NTP-2 28,70 1,90 36-8 20-7 0,70-3,0 1,25-3,50 NT-3 37,59 2,46 20-6 12-5 1,25-4,00 2,00-5,00 feed direction NT-3-K 37,59 2,46 20-6 12-5 1,25-4,00 2,00-5,00 NT-3-C 37,59 2,46 11-6 6 (only) 2,50-4,00 4,00 (only) NT-3-CK 37,59 2,46 11-6 6 (only) 2,50-4,00 4,00 (only) c NTF-3 21,08 1,37 44-10 24-9 0,60-2,50 1,00-2,50 1 adius NTK-3 21,08 1,37 44-10 24-9 0,60-2,50 1,00-2,50 D r A NTP-3 37,59 2,46 20-6 12-5 1,25-4,00 2,00-5,00 / NTF-NTK- NT-4 49,78 3,22 20-4 12-4 1,25-6,25 2,00-6,25 NT-4-K 49,78 3,22 20-4 12-4 1,25-6,25 2,00-6,25 - feed direction NT-4-C 49,78 3,22 11-4 1/2 6-4 1/2 2,50-5,50 4,00-5,50 NT-4-CK 49,78 3,22 11-4 1/2 6-4 1/2 2,50-5,50 4,00-5,50 NTF-4 21,08 1,37 44-10 24-9 0,60-2,50 1,00-2,50 NTK-4 21,08 1,37 44-10 24-9 0,60-2,50 1,00-2,50 NTP-4 49,78 3,22 20-4 12-4 1,25-6,25 2,00-6,25 Based on maximum insert radius size and class 2A and 2B thread specifications.