Look at that picture right over there on the right. That’s one of the Bronze Wheels of Peru. Looks like a gear, doesn’t it? If you knew nothing about it or the culture it sprang from and just happened to see it on the street, you’d probably label it as such. So many people have had that same thought, in fact, that the set has picked up another name: the Bronze Gears of Peru.

Cracks initiated at the surface of case-hardened gears may lead to typical life-limiting fatigue failure modes such as pitting and tooth root breakage. Furthermore, the contact load on the flank surface induces stresses in greater material depth that may lead to crack initiation below the surface if the local material strength is exceeded. Over time the sub-surface crack propagation may lead to gear failure referred to as “tooth flank fracture” (also referred to as “tooth flank breakage”). This paper explains the mechanism of this subsurface fatigue failure mode and its decisive influence factors, and presents an overview of a newly developed calculation model.

When you look at the floor plan for the Cobo Center (Detroit, MI) from Oct. 20-22, the names on the lineup really shouldn’t come as a great surprise.

Anyone even remotely involved with the gear industry knows that Gear Expo is B-I-G. Every two years, it is an invaluable opportunity for buyers, sellers and just-lookers to come together and glorify gearing.

When it came to picking a personal favorite booth at Gear Expo, AGMA Vice President of Marketing Jenny Blackford donned her proverbial TAG Heuer watch and embroidered silk apron and decided to keep her allegiance neutral.

Our goal at Gear Technology for the past 31 years has been to bring you the best possible technical information about gear manufacturing. We serve as the industry’s educational resource, explaining the technology not only so that you can understand it, but also so that you can make use of it in your gear-related business.

My last post discussed reviewing the ratings and designs of “legacy products,” those venerable parts and gearboxes still being ordered twenty, thir...

Many gear companies are not in a position to develop new products but most of them could make their current products better. Business schools may p...