Standard assortment The assortment of spherical roller bearings is the widest available on the market The standard assortment includes: 

• CC, CA and E design bearings 

• sealed bearings 

• bearings for vibratory applications 

• bearings for wind energy applications 

Almost all bearings are available with the option of a tapered bore Depending on the bearing series, the tapered bore has: 

• a taper 1:12 (designation sufix K)

• a taper 1:30 (designation sufix K30) 

CC, CA and E design bearings 

CC design bearings 

• CC design bearings  have two stamped window-type steel cages, an inner ring without langes and a loating guide ring centred on the inner ring (ig. 6) 

•CC design bearings  are indicated in the product table by the designation sufix C or CC 

•CC design bearings  are indicated in the product table by the designation sufix EC or ECC for larger bearings and have an optimized internal design for increased load carrying capacity

CA design bearings 

• CA design bearings  have a machined double prong-type brass cage, an inner ring with a retaining lange on both sides and a loating guide ring centred on the inner ring (ig. 6) The langes on the inner ring are designed to keep the rollers in place when swivelling the bearing during mounting or maintenance and are not designed to guide the rollers or accommodate any axial load

• CA design bearings  are indicated in the product table by the designation sufix CA 

•CA design bearings  are indicated in the product table by the designation sufix ECA for larger bearings and have an optimized internal design for increased load carrying capacity

E design bearings 

• E design bearings have two stamped window-type steel cages, an inner ring without langes and a loating guide ring centred on the inner ring (d ≤ 65 mm) or on the cages (d > 65 mm) (ig. 6) 

• E design bearings are indicated in the product table by the designation sufix E 

• E design bearings  have an optimized internal design for increased load carrying capacity 

Cages With the exception of full complement bearings, all rolling bearings contain a cage. The number of cages depends on the number of ball or roller sets within the bearing and on the cage design. The primary purposes of a cage are: 

• Keeping the rolling elements at a proper distance from each other to reduce the frictional moment and frictional heat in the bearing. 

• Keeping the rolling elements evenly spaced to optimize load distribution and enable quiet and uniform operation. 

• Guiding the rolling elements in the unloaded zone, to improve the rolling conditions and to prevent damaging sliding movements. 

• Retaining the rolling elements of separable bearings when one bearing ring is removed during mounting or dismounting

Cage materials Stamped metal cages 

Sheet steel cages The majority of stamped sheet steel cages are made of continuously hot-rolled low carbon steel in accordance with EN 10111. These lightweight cages have relatively high strength and can be surface treated to further reduce friction and wear. Stamped cages normally used in stainless steel bearings are made of X5CrNi18-10 stainless steel, in accordance with EN 10088-1.

Sheet brass cages 

Stamped sheet brass cages are used for some small and medium-size bearings. The brass used for these cages is in accordance with EN 1652. In applications like refrigeration compressors that use ammonia, season cracking in sheet brass might occur, therefore machined brass or steel cages should be used instead.

Machined steel cages 

Machined steel cages are normally made of non-alloyed structural S355GT (St 52) type steel in accordance with EN 10 025:1990 + A:1993. To improve sliding and wear-resistance properties, some machined steel cages are surface treated. Machined steel cages are used for large bearings or in applications where there is a danger that season cracking, caused by a chemical reaction, may occur if a brass cage is used. Steel cages can be used at operating temperatures up to 300 °C (570 °F). They are not affected by the mineral or synthetic oilbased lubricants normally used for rolling bearings, or by the organic solvents used to clean bearings. 

Machined brass cages 

Most brass cages are machined from a CW612N cast or wrought brass in accordance with EN 1652. They are unaffected by most common bearing lubricants, including synthetic oils and greases, and can be cleaned using normal organic solvents. Brass cages should not be used at temperatures above 250 °C (480 °F).