Gear Pressure Angle and Pitch.

[ChrisH]

Originally posted by sanddrag
Matt,
Great photo, thanks for posting it. Where is the planetary? Also, is there a picture that shows what is driving the worm? From what I see near the top right of the picture, it looks as if a chiaphua is driving the worm directly. Also, how is that worm attatched to the shaft it's on, pin keyway?
Very cool.
Thanks.

You can just see the planet gears inside the brass ring on the left side. Now you know why they call it a Ring Gear, the teeth are on the inside. The Worm could have been turned out of the shaft it's on. It kind of looks that way in the picture. In which case there no need for a key or pin. If not I'd guess they used a key as there is no sign of a pin. There is a pin above the worm, but it looks like it is mostly there to hold in the bushing supporting the worm.