1. Material of Shaft
 2. Material of Key
 3. Normalizing Heat Treatment of Key
 4. Rough Lathe Work of Shaft
 5. 1st Boring Work
 6. Welding Shaft & Key
 7. Normalizing Heat Treatment of Shaft
 8. 2nd Boring Work
 9. Fine Lathe Work of Shaft
 10. Rust control, Painting, and Packaging