Rakesh Kr Yadav specializes in what throing event in regular track and field competition that consists of a metal ball attached by a steel wire to a grip?
Rakesh Kumar Yadav Rakesh Kr Yadav (born 2 October 1977) is an Indian track and field athlete from Uttar Pradesh who specializes in Hammer throw. Kumar set the Indian National record of 70.16m in the discipline on 17 July 2003 during the Second National Athletic Circuit Meet in Bangalore. He erased the 70.13 metre mark of Ishtiaq Ahamed set there in the year 2000.
Jewel bearing A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewel material is usually synthetic sapphire or ruby (corundum). Jewel bearings are used in precision instruments where low friction, long life, and dimensional accuracy are important. Their largest use is in mechanical watches.