Page 572 - SKF-bearing-housings

Two-bearing housings PD series

Mounting Mounting PD units
Installing PD units is simple because the unit
PD housings must be mounted properly, using just needs to be bolted to the support surface.
the correct tools. All the associated compon- The rotary components are then mounted
ents must meet certain basic requirements onto the finished shaft ends secured by the
and the support surface should meet the spec- keys, end plates, and attachment screws (with
ifications provided under Housing support sur- spring washers) provided.
faces († page 45). Support the shaft properly when pressing
The housings have two markings († fig. 11): components onto the shaft to prevent the
mounting force acting on the bearings. Mount-
• A “square” on one end denotes the position ing instructions are available on request.
of the wider of the two bearing seats.
• A “triangle” on the other end indicates the Torque specifications
direction in which the predominant axial Cover bolts should be tightened to the
load should be applied. torque values listed in table 4 on page 566.
The cover bolts are in accordance with
For information about mounting rolling bear- ISO 4017.
ings, refer to the SKF bearing maintenance For information about attachment bolts,
handbook or skf.com/mount. refer to Attachment bolt recommendations on
page 566.
Mounting PDN series housings
The wave spring washers, supplied with
smaller housings in the PDN series, should be
inserted between the bearing and the cover on
the housing end marked with a triangle. The
rotary components (impeller, pulley, coupling
etc.) must be arranged so that the axial load
F a produced in operation acts in the direction
indicated by the triangle. SKF recommends
using a hydraulic nut or press for these
mounting operations.

Fig. 11

F a

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