DIN6 ni awọn išedede ti awọnti abẹnu helical jia. Nigbagbogbo a ni awọn ọna meji lati pade deede giga.
1) Hobbing + lilọ fun ti abẹnu jia
2) Skiving agbara fun jia inu
Sibẹsibẹ fun kekere ti abẹnu helical jia, hobbing ni ko rorun lati lọwọ, ki deede a yoo ṣe agbara skiving lati pade awọn ga yiye ati ki o tun ga ṣiṣe .Fun ńlá ti abẹnu helical jia , a yoo lo hobbing plus lilọ ọna . Lẹhin skiving tabi lilọ, irin paali aarin bii 42CrMo yoo ṣe nitriding lati mu líle ati resistance pọ si.