A u-joint, or universal joint, is a component that connects the driveshaft to the differential, and sometimes connects the
driveshaft to the transmission or two driveshafts to each other. It’s a cross shaped piece with a bearing at each end, that allows for lateral and side to side movement of the driveshaft.A u-joint allows for slight positions changed between the driveshaft, transmission, and differential. In other words; the
driveshaft connects the transmission to the differential, but it can’t be a static, solid connection. Since the differential moves independently from the rest of the vehicle over terrain, the transmission and differential don’t stay perfectly aligned with one another at all times. The u-joint compensates for motion, keeping the driveshaft connected and spinning freely.
universal joint application
aircraft
appliances
control mechanisms
Instrumentation
medical and optical devices
ordnance
radio
sewing machines
textile machInery
Universal joints are available in steel or in thermoplastic body members. Unlversal joints made of steel have maximum
load-carrying capacity for a given size. Universal joints with thermoplastic body members are used in light industrial
applications in which their self-lubricating feature, light weight, negligible backlash, corrosion resistance and capability for
high-speed operation are significant advantages.
