Gears are wonderful things. Unfortunately, they require support from shafts, bearings, and some sort of housing to be useful. Without these things,...

Before we move on from helix angle restrictions, I want to say a few things about face contact ratio. Soon after the appearance of the first helica...

Some of you are probably calling forth the gear deities to smite me for promoting a “free thinking” approach to helix angles; I understand complete...

Regular followers of this blog know whenever I say “it all depends,” that I am compelled to credit industry legend Ray Drago for stealing his catch...

We left the gear tribe arguing over how to solve the problems that were cropping up with the new-fangled double helical or herringbone designs. Fas...

When we cannot even agree how to pronounce “helical” it should not be a surprise that there is so much confusion about “proper” limits on helix ang...

My last post on helix angles and the constraining theories adopted at some shops reminded me that younger readers might not be aware that there was...

Regular readers know of my concerns about the over reliance on commercial gear design software. Some of what you are about to hear may sound famili...

One of the things I most enjoy about teaching newbies is the need to come up with different ways to explain important concepts. Today’s high school...