Page 596 - Rollingbearings

7 Needle roller bearings
Sealing solutions When capped bearings must operate under  WARNING
certain conditions, such as very high speeds Seals made of FKM (luoro rubber)
Associated external seals or high temperatures, some grease may exposed to an open lame or tempera-
leak For bearing arrangements where this tures above 300 °C (570 °F) are a health
• can be used for needle roller bearing would be detrimental, appropriate actions and environmental hazard! They remain
arrangements (ig. 12, page 586) could be taken dangerous even after they have cooled
• can be supplied in various sizes, as listed in Read and follow the safety precau-
the product tables: Sealed drawn cup needle roller tions on page 197
– Needle roller and cage assemblies, bearings
page 614
– Drawn cup needle roller bearings, For applications where a suficiently effective
page 618 seal is not available, or cannot be used for
– Needle roller bearings with machined space reasons, SKF supplies certain drawn
rings with langes, without an inner ring, cup needle roller bearings as sealed bear-
page 624 ings The assortment includes:

For information about associated power • drawn cup needle roller bearings with
transmission seals, refer to skf com/seals open ends (ig. 37)
– available for 8 ≤ F ≤ 50 mm
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– sealed on one side (designation
Capped bearings sufix RS)
– sealed on both sides (designation
SKF supplies certain needle roller bearings sufix 2RS)
capped with a seal or steel cover The assort- • sealed drawn cup needle roller bearings
ment of capped bearings includes: with a closed end (designation sufix RS,
ig. 38)
• drawn cup needle roller bearings, sealed – available for 10 ≤ F ≤ 25 mm
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on one or both sides
7 • needle roller bearings with machined These integral contact seals are made of
rings in the (R)NA 49 series, sealed on one PUR, FKM or NBR Sealed drawn cup needle
or both sides roller bearings are, under normal conditions
• combined needle roller bearings, capped and with appropriate counterface, an
with a steel cover over the thrust part of extremely cost-effective solution to exclude
the bearing solid contaminants and moisture, and retain
the lubricant in the bearing

Fig. 37 Fig. 38
Sealed drawn cup needle roller bearing with open ends Sealed drawn cup needle roller bearing
with a closed end

HK ‥ RS HK …2RS BK ‥ RS

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