Page 593 - SKF-bearing-housings

Housings for paper machines

SBFN, SBPN and SDM series

With increasing demands placed on the output
Bearing types of paper machines, the operating conditions for
• Spherical roller bearings housings, bearings and seals in this application
• CARB toroidal roller bearings
are quite severe. Very high temperatures are
typical and the risk of water contamination is
Bearing dimension series always high. SKF provides housings for felt
• 22, 23, 31 (SBFN series) rolls, drying cylinders, and Yankee cy linders
• 31 (SBPN series) (used for producing tissue and board).
• 30, 31 (SDM series)

Shaft diameter range
• 60 to 180 mm (SBFN series)
• 180 to 320 mm (SBPN series)
• 340 to 670 mm (SDM series)

Typical shaft-bearing combinations
• Stepped shaft with a bearing on a
tapered seat
Seals
• Labyrinth (SBFN and SBPN series)
• Gap-type seal with oil flinger
(SDM series)
Lubrication
• Circulating oil lubrication systems
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Materials
• Grey cast iron

Mounting
• Two-bolt mounting (SBFN series)
• Four-bolt mounting (SBPN and
SDM series)

Compliance to standards
• Not standardized
Supersedes
• SBF, SBP series

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