Page 387 - Rollingbearings

Designs and variants
Designs and Basic design bearings
• Hub bearing units
Hub bearing units (HBU) for the automo-
tive industry are based on double row variants • are intended for adjusted arrangements
angular contact ball bearings They have where only one bearing is used at each
made an appreciable contribution to the bearing position and are not suitable for
achievement of more compact weight- Single row angular mounting immediately adjacent to each
saving designs, simpliied assembly and contact ball bearings other
enhanced reliability. • have Normal tolerances on bearing width
Detailed information about these prod- and standout of the rings
ucts and variants for industrial applica- SKF single row angular contact ball bearings • have different performance capabilities 3
tions can be supplied on request. (ig. 2) can accommodate axial loads in one compared with SKF Explorer bearings
direction only. This type of bearing is typically
Bearing features adjusted against a second bearing. Their
bearing rings have an upper and a lower Bearings for universal
shoulder and are non-separable. matching
• Accommodate combined loads
– Axial loads in one direction only for SKF standard assortment • are available with 25° and 40° contact
single row bearings angles
– Axial loads in either direction for double • bearings in the 72 B(E) and 73 B(E) series • are intended to be used in sets
row and four-point contact bearings with 40° contact angle • have ring widths and standouts manu-
• some sizes in the 70 B series factured to tight tolerances
• High load carrying capacity • sealed bearings: • can also be used in place of basic design
– The lower shoulder enables a large – in series 72 B(E) (15 ≤ d ≤ 55 mm) bearings for arrangements with single
number of balls to be incorporated in – in series 73 B(E) (12 ≤ d ≤ 50 mm) bearings, as they typically have higher
single row bearings, giving them their • bearings in the 72 AC series with 25° precision, and increased load carrying
relatively high load carrying capacity. contact angle (15 ≤ d ≤ 70 mm) capacity and speed capability
– Because of the second row of balls, a • bearings in the 73 AC series with 25°
large number of balls are incorporated contact angle (17 ≤ d ≤ 70 mm) When two bearings are mounted immedi-
in double row bearings, giving them • some large size bearings with a langed ately adjacent to each other, a given internal
their high load carrying capacity. outer ring (skf com/go/17000-3-1) clearance or preload or an even load distri-
– A large number of balls are incorporated • SKF inch bearings (ALS and AMS series, bution between the two bearings is obtained
in four-point contact bearings, giving skf com/go/17000-3-1) without the use of shims or similar devices
them their high load carrying capacity. Bearings for universal matching are iden-
tiied by the following sufixes:
• Good running properties
High speeds, rapid accelerations and • CA, CB, CC or G for internal clearance
decelerations are possible. • GA, GB or GC for preload

When ordering, indicate the number of indi-
vidual bearings required and not the number
of sets

Fig. 3 Fig. 4
Double row bearing Four-point contact bearing

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