Crossed roller bearings SX are bearings for high precision applications, whose dimensions conform to ISO dimension series 18 to DIN 616. They comprise outer rings, inner rings, rolling elements and plastic spacers. The outer ring is split and is held together by three retaining rings.

Crossed roller bearings are very rigid, have high running accuracy and are supplied with normal clearance, low clearance or preload. Preloaded bearings have the suffix VSP.

The bearing outer rings are easily fixed to the adjacent construction using clamping rings.

Crossed roller bearings are also available in a corrosion-resistant version with the special coating Corrotect^®.

Due to the X arrangement of the cylindrical rollers, these bearings can support axial forces from both directions as well as radial forces, tilting moment loads and any combination of loads by means of a single bearing position. As a result, designs involving two bearing positions can be reduced to a single bearing position, Figure 1 and Figure 2.

The circumferential speed is dependent on the bearing (normal clearance or preloaded) and on the lubrication (grease or oil), see table.

The bearings are of an open design. The sealing arrangement can be designed anywhere within the adjacent construction.

SX bearings  do not have an oil-based preservative but are greased; they can be lubricated using oil, see also publication KSX.

For grease lubrication, a high quality lithium soap grease DIN 51825–KP2N–20 is suitable, for example Arcanol LOAD150 or LOAD220.

For oil lubrication, oils of type CLP to DIN 51517 or HLP to DIN 51524 of viscosity classes ISO-VG  10 to 100 have proved effective.

Crossed roller bearings are suitable for operating temperatures from –30 °C to +80 °C.

Suffixes for available designs: see table.