Page 46 - SKF-bearing-housings

SKF bearing housings – overview, selection and application recommendations

Comparison of typical shaft-bearing combinations

Plain shaft with bearing Stepped shaft with bearing
on an adapter sleeve on an adapter sleeve
Shaft • Machining not required, drawn round bars • M achining required, typically two steps • •
(h9 or better) can be used • Shaft strength weakened by shoulders • •
• Maximum shaft strength •
(no shoulders or undercuts)

Bearing • Bearing can be mounted at any position on • Bearing position determined accurately by • •
the shaft the stepped ring
• Internal clearance changes during • Internal clearance changes during • •
mounting (proper drive-up required) mounting (proper drive-up required)
• Axial load carrying capacity limited by the • Axial load carrying capacity limited by the • •
adapter sleeve shaft sleeve or adapter sleeve in one
direction and by the bearing and housing in
the other direction

Mounting and • 40% less mounting force required compared • Other components on the shaft can be • •
dismounting to other sleeve mounted arrangements as located axially against the bearing on its
friction only occurs between two mating sleeve via spacer sleeves •
surfaces • Easy dismounting as the bearing inner ring •
is in contact with the stepped ring •

Applications • Long shafts where more than two bearings • Support of shaft ends • •
are required for support • Frequent mounting and dismounting • •
• When the final position of the bearing •
cannot be accurately determined prior to
mounting
• When machine components are mounted
using clamping or tensioning devices so that
the shaft does not need to be machined

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