Patent ID: 9541134
Date: 2017-01-10
CPC Classifications: F16C

Claim:
1. A gearbox for a vehicle or aircraft, comprising: a pinion comprising a shaft and a bevel gear, a pinion bearing arrangement comprising a first roller bearing and a second roller bearing located on the shaft, the first roller bearing comprises a first outer raceway, a first inner raceway, and a first set of rolling elements therebetween and the second roller bearing comprises a second outer raceway, a second inner raceway, and a second set of rolling elements therebetween, wherein at least one of the first roller bearing and the second roller bearing is a ball bearing and wherein at least one of the first inner raceway, the first outer raceway, the second inner raceway, and the second outer raceway is made from a ball bearing steel produced by a powder metallurgical process using a powder metallurgy component including 0.5 (zero point five) to 2.0 (two point zero) weight-% C, a maximum of 0.035 (zero point zero three five) weight-% S, 3.0 (three point zero) to 5.0 (five point zero) weight-% Cr, 1.0 (one point zero) to 4.0 (four point zero) weight-% V, 1.0 (one point zero) to 12.0 (twelve point zero) weight-% W and 2.0 (two point zero) to 12.0 (twelve point zero) weight-% Mo, wherein both the first outer raceway and the first inner raceway have a first radius (r wherein both the second outer raceway and the second inner raceway have a second radius (r and wherein the first roller bearing is located closer to the bevel gear than the second roller bearing.