1) Hope 8620 bahan atah kana bar
2) Perawatan pre-panas (normalisasi atanapi quenching)
3) Lathe ngahurungkeun diménsi kasar
4) Hobbing spline (di handap video anjeun tiasa pariksa kumaha hob
5)https://youtube.com/shorts/80o4spawruk
6) Perawatan panas panas
7) nguji