Page 564 - SKF-bearing-housings

Two-bearing housings PD series

Design considerations The bearing arrangements are intended for
normal load conditions and relatively high
For general information about system design, speed operation. The arrangement for hous-
refer to the following sections: ings in the PDN 3 series can accommodate
heavier loads than PDN 2 series housings.
• Shaft seat tolerances († skf.com/bearings) A wave spring washer, supplied with hous-
• Load carrying capacity († page 44) ings up to size 218 or 316, preloads the bear-
• Specifications for shafts and housing support ings against each other to reduce noise levels.
surfaces († page 45) Units with spring-loaded bearings can
accommodate axial loads in one direction
For additional information about rolling bear- only († Mounting, page 568).
ings, refer to the product information available Housings in the PDN series can also be
online at skf.com/bearings. used for other bearing combinations († Non-
standard bearing arrangements, page 562).
Shaft-bearing combinations Housings in the PDP series
PD two-bearing housings accommodate bear- The bearing arrangement for housings in the
ings on a cylindrical seat on stepped shafts. PDP series comprises († fig. 6):
Standard bearing arrangements • a single row cylindrical roller bearing in the
PD two-bearing housings can accommodate NU 22 ECP series, in the non-locating bear-
different bearing arrangements, depending on ing position
the series. • a pair of universally matchable single row
angular contact ball bearings in the 72
Housings in the PDN series series, mounted back-to-back in the locat-
The bearing arrangement for housings in the ing bearing position
PDN series comprises:
This bearing arrangement accommodates
• two single row deep groove ball bearings axial loads in both directions and can support
in the 62 series for housings in the PDN 2 heavier loads than bearings in PDN series
series († fig. 4) housings.
• two single row deep groove ball bearings Housings in the PDP series can also accom-
in the 63 series for housings in the PDN 3 modate other bearing combinations.
series († fig. 5)

Fig. 4

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