NSK BSF3080 DDUHP2BDT = 2 pcs. Schrägkugellager (30x80x56)

As an angular contact ball bearing, this bearing carries combined radial and one-directional axial loads and is often used in pairs. At 30x80x56 mm and a unit weight of 1.505 kg, the installation envelope is fixed; further technical details are held in the specification table. What is recorded for these items is the material — standard bearing steel — but not the sealing design or the clearance; both are to be taken from the type designation and the specification table.

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.