| Year | 2010 |
| Date | 13-Aug |
| Volume | 205 |
| Issue | 4,384 |
| Page | 202 |
| Category | Workshop |
| Part | |
| Title | The cutting of helical gears |
| Author | D.A.G.Brown and Giles Parkes |
| Notes | Look at helical hobbing. Symbols, Jacobs/CES machine, hobbing the blank, enter the helical gear, Barber-Colman gear hobbing machine, manual calculation, feed gears |