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...

Most of the gearboxes I have been involved with use single helical gears. Its excellent power capacity per mesh makes it the default system for man...

A few weeks ago, I admitted to not knowing much about the Klingelnberg system of bevels. Terry Edwards, chief designer at Pacific Star Marine in Br...

Continuing our discussion of the “least you need to know” about worm gearing: 5. Efficiency is highly variable for worms. If it is critical to y...

Worm gearing has long been a big part of the mechanical world. If you work in the gear trade, “civilians” will rightly expect you to know things ab...

It is difficult to know where to start when writing about worm gears, because this market segment has defied “standardization” within the United St...

Does technical lingo confuse you? If so, welcome to the bevel gear sector and its special kind of hell. The same “system” that benefited from stand...