231/530 CA/W33

 

Dimensions

d	530 mm	Bore diameter
tΔdmp	-0.05 – 0.0 mm	Deviation limits of mid-range bore diameter
D	870 mm	Outside diameter
tΔDmp	-0.1 – 0.0 mm	Deviation limits of mid-range outside diameter
B	272 mm	Width
tΔBs	-0.5 – 0.0 mm	Deviation limits of ring width
d2	≈638 mm	Shoulder diameter of inner ring
D1	≈763 mm	Shoulder/recess diameter of outer ring
b	22.3 mm	Width of lubrication groove
K	12 mm	Diameter of lubrication hole
r1,2	min.7.5 mm	Chamfer dimension
	Normal	ISO tolerance class for dimensions

Abutment dimensions

da	min.562 mm	Diameter of shaft abutment
Da	max.838 mm	Diameter of housing abutment
ra	max.6 mm	Radius of fillet

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	8 526 kN
Basic static load rating	C0	14 000 kN
Fatigue load limit	Pu	880 kN
Reference speed		360 r/min
Limiting speed		670 r/min
Limiting value	e	0.3
Calculation factor	Y1	2.3
Calculation factor	Y2	3.4
Calculation factor	Y0	2.2

Tolerances of run-out

Range of section height at inner ring of assembled bearing	tKia	70 µm
Range of section height at outer ring of assembled bearing	tKea	140 µm
ISO tolerance class for geometrical tolerances		Normal

Radial internal clearance

Minimum initial clearance	280 µm
Maximum initial clearance	440 µm

High-Capacity Performance: 231/530 CA/W33 Spherical Roller Bearing
The 231/530 CA/W33 spherical roller bearing is engineered for heavy-duty applications requiring exceptional load-handling capabilities. Featuring a symmetrical barrel-shaped roller design and two rows of rollers, this bearing efficiently manages combined radial and axial loads, even in misaligned conditions. Its robust brass CA cage ensures optimal roller guidance and durability under high-stress operations. The integrated W33 lubrication groove and oil hole simplify maintenance by enabling consistent grease distribution, reducing wear and extending service intervals. With an inner diameter of 530 mm and a dynamic load rating exceeding 5,000 kN, this bearing excels in environments demanding reliability under extreme pressures.

Advantages for Industrial Longevity
Designed to minimize downtime, the 231/530 CA/W33 offers superior thermal stability and fatigue resistance, critical for industries like mining, cement production, and metal processing. The brass cage minimizes friction and heat generation, while the spherical outer ring raceway compensates for shaft misalignment up to 1.5 degrees, preventing premature failure. Its hardened steel construction and advanced surface treatment enhance corrosion resistance, making it suitable for harsh, contaminant-prone settings. Field tests show a 30% longer operational lifespan compared to standard bearings, reducing replacement costs and improving system efficiency.

Versatile Applications Across Heavy Industries
This bearing is widely adopted in large-scale machinery such as crushers, vibrating screens, and industrial gearboxes, where shock loads and rotational speeds vary drastically. In wind turbines, it supports main shaft rotations by accommodating dynamic wind forces and structural flexing. The 231/530 CA/W33 is also integral to pulp and paper processing equipment, handling high humidity and chemical exposure. Engineers prioritize its use in steel mill conveyor systems, where continuous operation and load shifts demand uncompromising reliability. Customizable sealing options further adapt it to specialized environments, solidifying its role as a cornerstone component in heavy industrial engineering.

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