Designs

Drawn cup needle roller bearings with open ends

SKF drawn cup needle roller bearings with open ends (fig. 1) are identified by the series designation HK. They are available open (without seals) or sealed on one or both sides (→ Sealing solutions).

Drawn cup needle roller bearings with a closed end

SKF drawn cup needle roller bearings with a closed end (fig. 2) are identified by the series designation BK. They are available open or sealed (→ Sealing solutions) and are suitable for bearing arrangements at the end of a shaft. The profiled design of the closed end accommodates small axial guidance forces.

Full complement drawn cup needle roller bearings

SKF full complement drawn cup needle roller bearings (fig. 3) are identified by the series designation HN. They are suitable for very heavy radial loads at moderate speeds and are available with open ends and without seals only.

Greases for full complement drawn cup bearings

Full complement drawn cup needle roller bearings are supplied with a special grease to secure the rollers during transport. However, SKF recommends relubricating after mount­ing, as this grease does not provide sufficient long term lubrication. Depending on the required consistency class, SKF recommends SKF LGEP 2 or SKF LGMW 1 grease for relu­brication. The technical specifications of the initial grease fill and the relubrication greases are listed in table 1.

Arrangements with components and other bearings

Generally, drawn cup needle roller bearings run directly on a shaft. However, in applications where the shaft cannot be hardened and ground, bearings should be combined with an inner ring (fig. 4, fig. 5). Wide inner rings can also provide an excellent counterface for the lips of external G or SD design seals (→ Seals). For additional information about inner rings, refer to Needle roller bearing inner rings.
To accommodate combined radial and axial loads, certain sizes of drawn cup needle roller bearings can be combined with a needle roller thrust bearing with a centring flange, AXW series (fig. 6). For additional information, refer to Needle roller thrust bearings.
SKF logo