Page 47 - SKF-bearing-housings

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D esign considerations

Table 8

Stepped shaft with bearing Stepped shaft with bearing
on a withdrawal sleeve on a cylindrical seat
• • • Machining required, typically two steps • Machining required, typically two steps
• • Shaft strength weakened by shoulders • Shaft strength weakened by shoulders
• • Largest shaft diameter for a given bearing size

• • • Bearing position determined accurately by the • Bearing position determined accurately by the
shaft shoulder shaft shoulder
• • • Internal clearance changes during mounting • Internal clearance determined by the shaft seat
(proper drive-up required) tolerance
• • • Axial load carrying capacity limited by the • Axial load carrying capacity limited by the
shaft sleeve or withdrawal sleeve in one bearing and housing
direction and by the bearing and housing
in the other direction
• • • Other components on the shaft can be located • Other components can be located axially against
axially against the bearing on its sleeve via the bearing via spacer sleeves
spacer sleeves • Suitable when large numbers of bearings have to
• • Easy dismounting with a withdrawal sleeve be mounted
and hydraulic nut • Simple axial locating by shaft nut
• • • Support of shaft ends • Support of shaft ends
• • Frequent mounting and dismounting • Frequent mounting and dismounting
• • Suitable for shock loads or where higher speeds
or higher precision are required
•

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