Designing gears is somewhat of a mathematical puzzle. You have lots of interconnected factors to play with in hopes of finding the “best” overall s...

Few designers would feel comfortable with a face to pinion pitch diameter ratio of 2.00 anymore. Some still prefer to select face width by face con...

The second component in that face contact ratio equation is the face width. There are almost as many “rules of thumb” for determining the “proper” ...

I was trained in the cult of the integer face contact ratio. A few adherents to this belief are still above ground, but the introduction of persona...

The most obvious difference between a spur gear and a helical gear is the presence of that “helix” angle. Civilians will call them “straight-cut” a...

How did that over pin calculation work out? My congratulations if you managed to work your way through it without tearing your hair out. Guess what...

Spur gears have been around “forever.” That ancient astronomical device recovered from the Mediterranean Sea a few years ago shows the antiquity an...

For many years, “robust” was a popular business buzz word. The idea was to make certain your procedures and processes were “strong” enough to withs...

I have been following developments on gear making in general-purpose CNC machines with great interest. The advent of affordable gear grinding seems...

This article presents an analysis of asymmetric tooth gears considering the effective contact ratio that is also affected by bending and contact tooth deflections. The goal is to find an optimal solution for high performance gear drives, which would combine high load capacity and efficiency, as well as low transmission error (which affects gear noise and vibration).