Page 76 - SKF-bearing-housings

Split plummer block housings SNL 2, 3, 5 and 6 series

Design considerations seal. The spacer sleeve is not supplied with by
SKF.
For general information about system design,
refer to the following sections: Stepped shaft with bearing on an adapter sleeve
When using an SNL plummer block housing
• Typical shaft-bearing combinations for this arrangement, the dimensions of the
(† page 41) abutment ring and the spacer sleeve must fit
• Locating/non-locating bearing arrangements the housing. Abutment rings and spacer
(† page 40) sleeves are not supplied by SKF.
• Load carrying capacity († page 44)
• Axial load carrying capacity for bearings on Stepped shaft with bearing on a withdrawal
sleeves († page 44) sleeve
• Specifications for shafts and housing support When using an SNL housing for this arrange-
surfaces († page 45) ment, the withdrawal sleeve must be located
axially on the shaft. This can be done using a
For additional information about rolling spacer sleeve that is held in place by another
bearings and adapter sleeves, refer to the component. Using a lock nut can be difficult
product information available online at because of the limited space in the housing.
skf.com/bearings. The outside diameter of the spacer sleeve
must be the same as the shaft abutment
diameter d b , († product tables) and it should
Typical shaft-bearing combinations be in accordance with the h9 V E tolerance class
SNL plummer block housings in the 2, 3, 5 and to fit the seal. The spacer sleeve is not supplied
6 series can accommodate different shaft- by SKF.
bearing combinations († fig. 10):
• plain shaft with bearing on an adapter Locating and non-locating
sleeve bearing positions
• stepped shaft with bearing on a cylindrical SNL housings can be used for both the locating
seat and non-locating bearing positions.
• stepped shaft with bearing on an adapter The housings are machined standard for
sleeve bearings in the non-locating position. Bear-
• stepped shaft with bearing on a withdrawal ings in the locating position as well as CARB
sleeve toroidal roller bearings must be secured in the
housing on both sides with locating rings.
Plain shaft with bearing on an adapter sleeve Appropriate locating rings are listed in the
This arrangement is standard for housings in product tables.
the SNL 5 and 6 series. Housings, appropriate
parts and dimensions are listed in product
tables 2.1 († page 86) and 2.2 († page 100).
Stepped shaft with bearing on a cylindrical seat
This arrangement is standard for housings in
the SNL 2 and 3 series, but can also be used
for several housings in the SNL 5 and 6 series.
Housings, appropriate parts and dimensions
are listed in the product table 2.3, starting on
page 120.
The bearing is located axially between a
shaft shoulder and a spacer sleeve which is
held in place by another component on the
shaft. The outside diameter of the spacer
sleeve must match the bore diameter of the

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