The groups are at Timken's option if nothing to the contrary is agreed upon at the time of ordering. This is in accordance with Grade G2 speciﬁed in ISO 3096 standard (see needle rollers, page.
2 NEEDLE ROLLER BEARINGS NEEDLE ROLLER BEARINGS PRODUCT BREADTH A complete line of needle roller bearing designs ranging from 3 to 160 mm bore (1/8 to 6 1/4 in.) is offered.DRAWN CUP NEEDLE ROLLER BEARINGS, available in 3 mm to 140 mm bore (1/8 to 5 1/2 in.), are designed to support radial loads and reduce friction between rotating components.
Drawn cup needle roller bearings have a thin case-hardened outer ring that is out-of-round from the hardening operation. For proper mounting it must always be pressed into the housing. Split housings will not round and size a drawn cup bearing. When split housings must be used, the bearing should ﬁ rst be mounted in a cylindrical sleeve.
Needle roller and cage assemblies are manufactured with either one or two rows of needle rollers. Drawn Cup Bearings The outer ring in the form of a cup is accurately drawn and no subsequent machining is performed to build the outer raceway. Drawn cup needle roller bearings are available in open ends or single, closed-end designs.