SKF four-row cylindrical roller bearings wholesaler

SKF four-row cylindrical roller bearings are available in several designs:

• with a cylindrical or tapered bore
• open or sealed

SKF four-row cylindrical roller bearings are used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Because they are normally mounted with an interference fit on the roll neck, four-row cylindrical roller bearings are well suited for rolling mill applications where the rolling speed is high.

Because SKF four-row cylindrical roller bearings can accommodate only radial loads, they are mounted together with deep groove or angular contact ball bearings, or with tapered roller bearings (either radial or thrust design) which accommodate the axial loads.

SKF four-row cylindrical roller bearing features

Exceptional high load carrying capacity 
Because of their high number of rollers, four-row cylindrical roller bearings are suitable for very heavy radial loads.

Low friction (Roller end / flange contact area) 
The open flange design, together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction.

Long service life 
The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.

Enhanced operational reliability 
The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.

Separable and interchangeable 
The separable components of SKF four-row cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.

High speed capability 
The cage designs are suitable for high speeds, rapid accelerations and impact loads.

Low cross-sectional height 
The low cross-sectional height of four-row cylindrical roller bearings allows for relatively large roll neck diameters compared to the roll diameter.

SKF four-row cylindrical roller bearing designs

The SKF standard assortment of four-row cylindrical roller bearings includes bearings with a cylindrical or tapered bore, as well as open and sealed designs.

SKF basic design four-row cylindrical roller bearings are available in several designs. The major design differences between the bearings are the number of inner and outer rings, the ring designs (flange configurations), and the cage design and material. The most popular bearing designs are:

Bearing design	Ring and flange design	Cage design
BC4.1 design	two outer rings each with three integral flanges one inner ring no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.1 design	two outer rings each with three integral flanges  one inner ring tapered bore  no flanges	two cages machined brass or steel double prong-type roller centred
BC4.2 design	two outer rings each with three integral flanges intermediate ring in between one inner ring no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.2 design	two outer rings each with three integral flanges intermediate ring in between one inner ring tapered bore no flanges	two cages machined brass or steel double prong-type roller centred
BC4.3 design	two outer rings each with an integral central flange intermediate ring in between two flange rings one inner ring no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.3 design	two outer rings each with an integral central flange intermediate ring in between two flange rings one inner ring tapered bore no flanges	two cages machined brass or steel double prong-type roller centred
BC4.4 design	two outer rings each with two integral flanges  one inner ring no flanges	two cages machined brass window-type roller centred
BC4T.4 design	one outer ring two flange rings three guide rings  one inner ring tapered bore no flanges	two cages machined brass or steel double prong-type roller centred
BC4.5 design	one outer ring two flange rings three guide rings  one inner ring no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.5 design	two outer rings each with an integral central flange intermediate ring in between two flange rings one inner ring tapered bore no flanges	four cages machined steel pin-type pierced rollers
BC4.6 design	one outer ring five integral flanges one inner ring no flanges	four cages machined brass or steel prong-type roller centred
BC4T.6 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings tapered bore no flanges	four cages machined steel pin-type pierced rollers
BC4.7 design	two outer rings each with three integral flanges two inner rings no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.7 design	two outer rings each with three integral flanges  one inner ring tapered bore extended on one side  no flanges	two cages machined brass or steel double prong-type roller centred
BC4.8 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings no flanges	two cages machined brass or steel double prong-type roller centred
BC4T.8 design	one outer ring two flange rings three guide rings one inner ring tapered bore extended on one side with a lead-in taper  no flanges	two cages machined brass or steel double prong-type roller centred
BC4.9 design	two outer rings each with three integral flanges two inner rings no flanges	four cages machined steel pin-type pierced rollers
BC4.10 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings no flanges	four cages machined steel pin-type pierced rollers
BC4.11 design	two single row and one double row outer rings two intermediate rings in between each single row ring with an integral flange  double row ring with an integral central flange  two inner rings no flanges	four cages machined steel pin-type pierced rollers
BC4.12 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings no flanges	four cages stamped steel window-type roller centred
BC4.13 design	two outer rings each with two integral flanges  two inner rings no flanges	two cages machined brass window-type roller centred
BC4.14 design	two outer rings each with an integral central flange intermediate ring in between two flange rings four inner rings no flanges	four cages machined steel pin-type pierced rollers
BC4.15 design	two outer rings no flanges two inner rings each with three integral flanges	four cages machined steel pin-type pierced rollers
BC4.16 design	one outer ring two flange rings three guide rings one inner ring extended on one side no flanges	two cages machined brass or steel double prong-type roller centred
BC4.17 design	two outer rings each with three integral flanges two inner rings one ring extended on one side no flanges	two cages machined brass or steel double prong-type roller centred
BC4.18 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings one ring extended on one side no flanges	two cages machined brass or steel double prong-type roller centred
BC4.19 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings one ring extended on one side no flanges	four cages machined steel pin-type pierced rollers
BC4.20 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings one ring extended on one side with a concentric shoulder no flanges	four cages machined steel pin-type pierced rollers
BC4.21 design	two outer rings each with an integral central flange intermediate ring in between two flange rings two inner rings each extended on one side one ring with a concentric shoulder one ring with a lead-in taper no flanges	four cages machined steel pin-type pierced rollers

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