Page 847 - Rollingbearings

Designs and variants
Sealed bearings Cages Customized bearings

• are available, as standard, as small and CARB bearings, if not a full complement of SKF can customize bearings to meet the
medium-size full complement bearings rollers, are itted with one of the following needs of applications where the bearings are
with a cylindrical bore cages: subjected to unique operating conditions
• are typically used for low speeds and very For example, bearings for:
heavy loads • glass ibre reinforced PA46 cage,
• are suitable for both inner or outer ring window-type, roller centred (designation • paper mills or coaters in high precision
rotation sufix TN9) execution
• are itted with a double-lip contact seal on • stamped steel cage, window-type, roller • very arduous operating conditions, e g
one or both sides in a recess on the outer centred (no designation sufix) continuous casters
ring, sealing against the inner ring • machined brass cage, window-type, roller • high temperature applications
raceway centred (designation sufix M)
• are available with two different seal mater- • machined brass cage, inner ring centred For additional information about
ials / designs (ig. 10): (designation sufix MB) application-speciic CARB bearings, contact
– sheet steel reinforced HNBR (designa- the SKF application engineering service
tion sufix CS5) When used at high temperatures, some
– sheet steel reinforced NBR (designation lubricants can have a detrimental effect on
sufix NS) with enhanced sealing effect- polyamide cages For additional information
iveness – mainly intended for oscillating about the suitability of cages, refer to Cages,
or very low speed applications page 187

Bearings sealed on both sides are lubricated
for the life of the bearing and are virtually
maintenance-free. They are illed with one of
the following greases (table 1):
• bearings with HNBR seals → SKF LGHB 2
grease as standard ()
• bearings with NBR seals → SKF LGEP 2
grease as standard
• other SKF greases on request

For additional information about greases,
refer to Selecting a suitable SKF grease,
page 116

Table 1
Technical speciications of SKF greases for sealed CARB bearings
10
Grease Designa- Temperature range 1) Thickener Base oil NLGI grade Base oil viscosity
tion sufix type [mm 2 /s]
at 40 °C at 100 °C
(105 °F) (210 °F)
–50 0 50 100 150 200 250 °C

LGEP 2 VT143 Lithium soap Mineral 2 200 16

LGHB 2 GEM9 Calcium Mineral 2 400 26,5
sulphonate
complex
–60 30 120 210 300 390 480 °F

1) Refer to the SKF trafic light concept (page 117)

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