Page 3 of catalogue Bearings for screw drives of Schaeffler Technologies GmbH & Co. KG

Bearings for screw drives

Matrix for preselection of bearings

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A matrix structured in terms of applications allows rapid preselection of the suitable bearing for a specific application.

Axial Angular contact ball bearings

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Axial angular contact Ball bearings are precision bearings for supporting screw drives. Depending on the series, they can support high radial forces as well as axial forces from one or both sides. The inner ring is matched to the ball and cage assemblies and the outer ring. As a result, the bearings can be set to a defined axial preload. Contact Seals protect the rolling element system against contamination and moisture. For higher speeds, gap seals can be used. The bearings are available with and without fixing holes in the outer ring. Bearings with holes are screw mounted directly on the adjacent construction. This solution is particularly economical since there is no need for the locating bore otherwise required or for the bearing cover with the associated matching work. For applications in the handling sector, for woodworking machinery and transport type screw drives, a bearing arrangement with a lower level of precision is often sufficient. For this purpose, there are versions with less stringent tolerances.
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Needle roller/axial cylindrical Roller bearings

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Needle roller/axial Cylindrical roller bearings are double direction precision axial cylindrical roller bearings with a radial bearing component. The inner ring, outer ring and cylindrical roller and cage assemblies are matched to each other such that the bearings can be set to a defined axial preload using a precision locknut. The bearings are available with and without fixing holes in the outer ring. Bearings with holes are screw mounted directly on the adjacent construction. The large contact surface and the small pitch of the holes allows a connnection to the adjacent construction that is extremely rigid and with low tendency to settling. The bearing cover that would otherwise be required to hold the bearing, and the matching work required, can therefore be dispensed with. Needle roller/axial cylindrical roller bearings are also available with a stepped, extended shaft locating washer on one side. These bearings are used where the axial support of the shaft locating washer is insufficient or a seal raceway is required.
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Seal carrier assemblies Precision locknuts

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Seal carrier assemblies DRS are complete sealing sets that are screw mounted on the central washer of needle roller/ axial cylindrical roller bearings ZARF (L). They are precisely centred in this position and seal the bearings against external influences. The precision locknuts AM, ZM, ZMA for axial or radial locking are used to set bearings for screw drives to a defined axial preload. They are also used where high axial forces must be supported and high runout accuracy and rigidity are required.

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Schaeffler Group Industrial