NSK 7313 BEAW Schrägkugellager (65x140x33)

As an angular contact ball bearing, this bearing carries combined radial and one-directional axial loads and is often used in pairs. This NSK bearing measures 65x140x33 mm and weighs 2.2 kg; the specification table carries the supplementary technical details. Whether this bearing brings its own sealing and which clearance class it is supplied with is to be established from the product data at these positions.

What characterises the angular contact ball bearing is the offset of the contact points on the inner and outer ring: the line of force action runs through the bearing at an angle, which is why radial and axial force can be transmitted together. In the single-row design the axial force is tied to one direction, and even a purely radial load produces an internal axial component; the arrangement therefore needs a second bearing position acting in opposition, whose configuration — diverging outwards, converging inwards, or in tandem in the same sense — determines the support base, the moment capacity and the sensitivity to angular error.

Rings and balls are made of through-hardened standard bearing steel, whose hardness, dimensional stability and fatigue strength are matched to the usual operating temperature range. No separate catalogue attributes for the sealing or the clearance of these items are available, and both matter for the layout: the sealing design decides whether lubricant retention and dirt exclusion rest with the bearing or with the adjacent construction, and how closely speed and operating temperature are limited; the clearance class, through the contact angle, also fixes what axial offset the setting of the bearing pair has to absorb.

Both figures are therefore to be taken from the type designation and the specification table of the individual item and reconciled with the load case, the fit and the temperature profile of the bearing position.