The wear and wear debris from rotating-platform mobile-bearing knees and fixed-bearing knees were compared in knee joint-simulator studies. The wear rate of the fixed-bearing knees was found to ...

I was wondering: what single thing did the most to advance humankind’s lot? Speech must score pretty highly, I suppose, as must writing, paper, discovering how to light a bonfire and Google image ...

A ROTATING shaft can exhibit torsional vibration when, because the dynamic coefficient of friction is less than the static value, the frictional force at the bearings supporting the shaft decreases as ...

Bores are sealed with ‘O’ rings' sited in grooves, (figure 1). The ‘O’ rings' are usually of toroidal shape (i.e. circular cross section) and are regulated by BS 1806 and BS 4518. Figure 1. ‘O’ Ring ...

• Magnetic bearings support rotating shafts in five axes without solid or fluid lubricants. • Advances in electronics allow previously bulky controllers to mount on or near rotating machinery. • ...

Rotary actuators produce oscillating power by rotating an output shaft through a fixed arc. They are compact, simple, and efficient. They produce high instantaneous torque in either direction and ...