Drawn Cup Needle Roller Bearings
The outer ring is a thin, drawn and hardened steel cup that carries the needles directly. Pressed into a correctly sized bore it becomes its own raceway, so a light casting or a sheet housing can take a rolling bearing without any bushing or shoulder. SES holds the range as an authorised SKF distributor, covering bore range About 3 mm to 60 mm; designations HK open end, BK closed end, and sealed variants; housing bore Tolerance and finish are critical, typically N6 or M6; shaft raceway 58 to 64 HRC when no inner ring is used. Executions include HK open end drawn cup bearings, BK closed end drawn cup bearings, sealed drawn cup bearings, full complement drawn cup bearings, among others. It is specified most often into small gearbox idler and reverse gear bores and automotive and off-highway steering and pedal assemblies. Every part is genuine SKF through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
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From integrated steel plants to power utilities and EPC majors — the works that cannot afford a counterfeit part specify through SES.
Outer ring
Thin drawn cup, hardened
Housing
Bore fit alone retains the bearing
Ends
Open both ends or closed one end
Shaft
Hardened and ground unless an inner ring is used
Where it runs.
You will find Drawn Cup Needle Roller Bearings in the parts of a plant where this particular duty actually occurs. In practice that means small gearbox idler and reverse gear bores, automotive and off-highway steering and pedal assemblies, packaging and printing machine rollers, and equally textile machine spindles and guide rollers, small hoist and lifting gear pivots, fan pivots, dampers and light linkage joints. What links them is the duty rather than the machine name — outer ring: Thin drawn cup, hardened. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the SKF range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. The bore is blind and lubricant must be retained at one end — The closed-end BK type, which seals the end of the bore without an extra plug or cover. The bore is through and the shaft passes right across — The open-end HK type, sized so the two ends of the shaft are supported symmetrically. The application is dusty or splashed with process liquid — The lip-sealed execution, since the drawn cup on its own offers no protection to the needle set. Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Press only on the marked face, using a mandrel that supports the whole ring end. Push a drawn cup in by its open end and the thin section distorts, taking the bore out of round and nipping the needles.