1. Working with milling complex
Basic competency :
Milling helix gear

2. Learn activity V Milling helix gear Activity aim:
Realize and make calculation about helix gear
Can made helix gear

3. Helix gear bodywork

4. Helix gear bodywork D : Distance for diameter Informations:
Df : Tooth foot diameter
Dk : Tooth head diameter
h : Tooth high
hf : Tooth foot high
hk : Tooth head high
b : Tooth slope corner
ta : Distance between tooth arch
tn : Distance between normal tooth arch
b : Tooth wide
bn : Normal tooth wide
Informations:

5. Milling helix gear Steps: a. Size calculation b. Cutter election
c. Successor gear installing
d. Object installing
Steps:
e. Cutter setting
f. Bed setting
g. Dismemberment depth setting
h. Dismemberment

6. Size calculation 1) Pitch diameter Metric system
= tooth total x module x slope corner secant
Diametral Pitch System

7. Size calculation 2) Outside Diameter
a) Outside Diameter = Pitch diameter + (2 x modul)
b) Outside Diameter = Pitch diameter +

8. Size calculation
3) Revolve that must be cut

9. Gear transfer ratio Uw : Gear comparison from wheels exchange
Pl : Object revolve
Pw: : Object revolve screw
zPG : Tooth total time result from activator wheels exchange
zDG : Tooth total time result from moved wheels exchange

10. Resume helix gear milling steps: a. Size calculation
b. Cutter election
c. Successor gear installing
helix gear milling steps:
d. Object installing
e. Cutter setting
f. Bed setting
g. Dismemberment depth setting
h. Dismemberment

11. Task
Do observation in repair shop or industrial! Perceive helix gear use!
2. Analysis its use, profit and the loss!

12. Formative test Explain helix gear bodywork
2. What most determine in cutter election in helix gear milling?
3. Helix gear has countershaft rotation 1200rpm, transmission number 3, tooth total 20, normal module 2 and tooth corner 18. Determine gear fundamental norm!

13. DAFTAR PUSTAKA
Tim Fakultas Teknik Universitas Negeri Yogyakarta (2004) Modul Mengeset Mesin dan Program CNC (dasar), Yogyakarta:Bagian Proyek Pengembangan Kurikulum.
Windarto (2008) Teknik Pemesinan Jilid 2, Memahami Mesin CNC Dasar, Jakarta:Direktorat Pembina Sekolah Kejuruan.