Page 586 - Rollingbearings

7 Needle roller bearings
Other needle roller and cage Drawn cup needle SKF standard assortment
assemblies SKF supplies a wide assortment of drawn
roller bearings cup needle roller bearings This includes:
Needle roller and cage assemblies with a
split cage can be used where raceways are SKF drawn cup needle roller bearings have a • bearings with open ends (ig. 8)
recessed in the shaft (ig. 5) deep drawn, thin-walled outer ring Drawn • bearings with a closed end (ig. 9)
Special needle roller and cage assemblies cup needle roller bearings are typically used • full complement bearings with open ends
are used for the gudgeon (wrist) pin (ig. 6) in applications where the housing bore can- (ig. 10)
and crankpin (crankshaft journal) (ig. 7) for not be used as a raceway for a needle roller
connecting rods of internal combustion and cage assembly, but where a very com- SKF drawn cup needle roller bear ings:
engines and compressors They provide pact and economical bearing arrangement is
excellent service in spite of rapid accelera- required These bearings are mounted with • are supplied without an inner ring
tions, elevated temperatures, unfavourable a tight interference it in the housing This • are generally designed with one needle
load, and poor lubrication conditions enables a simple and economic design of the roller and cage assembly – except wide
For additional information about special housing bore, as shoulders or snap rings are sizes, which incorpor ate two needle roller
sizes and designs, which are available on not required to locate the bearing axially and cage assemblies immediately adjacent
request, contact SKF The drawn cup of hardened steel and the to each other, with a lubrication hole in the
needle roller and cage assembly of these outer ring (ig. 11)
bear ings form a non -separable unit

Fig. 5
Needle roller and cage assemblies with a split cage

7

Fig. 6 Fig. 7
Special needle roller and cage assembly for the gudgeon (wrist) pin Special needle roller and cage assembly for the crankpin (crank-
shaft journal)

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