239/900 CAK/W33

 

Dimensions

d	900 mm	Bore diameter
tΔdmp	0.0 – 90.0 µm	Deviation limits of mid-range bore diameter
tΔSL	0.0 – 90.0 µm	Deviation limits of tapered slope
D	1 180 mm	Outside diameter
tΔDmp	-125.0 – 0.0 µm	Deviation limits of mid-range outside diameter
B	206 mm	Width
tΔBs	-1000.0 – 0.0 µm	Deviation limits of ring width
d2	≈996 mm	Shoulder diameter of inner ring
D1	≈1 101 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.6 mm	Chamfer dimension
	Normal	ISO tolerance class for dimensions

Abutment dimensions

Da	max.1 157 mm	Diameter of housing abutment
ra	max.5 mm	Radius of fillet

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	7 652 kN
Basic static load rating	C0	17 000 kN
Fatigue load limit	Pu	1 000 kN
Reference speed		240 r/min
Limiting speed		450 r/min
Limiting value	e	0.15
Calculation factor	Y1	4.5
Calculation factor	Y2	6.7
Calculation factor	Y0	4.5

Tolerances of run-out

Range of section height at inner ring of assembled bearing	tKia	90 µm
Range of section height at outer ring of assembled bearing	tKea	160 µm
ISO tolerance class for geometrical tolerances		Normal

Radial internal clearance

Minimum initial clearance	640 µm
Maximum initial clearance	840 µm

239/900 CAK/W33 Spherical Roller Bearing: Robust Design for Heavy-Duty Applications
The 239/900 CAK/W33 spherical roller bearing is engineered to deliver exceptional performance in demanding industrial environments. Featuring a symmetrical barrel-shaped roller design and two rows of rollers, this bearing accommodates heavy radial loads and moderate axial loads in both directions. Its W33 designation indicates an integrated lubrication groove and three oil holes on the outer ring, ensuring consistent lubricant distribution for reduced friction and prolonged service life. The CAK suffix denotes a robust stamped steel cage, which enhances durability and maintains precise roller alignment under high-stress conditions. Ideal for applications with misalignment or shaft deflection, this bearing is a reliable solution for industries requiring heavy-load handling and operational stability.

Advantages of the 239/900 CAK/W33 in Industrial Settings
With its high load-carrying capacity and self-aligning capability, the 239/900 CAK/W33 minimizes downtime in critical machinery. The optimized internal geometry reduces stress concentrations, while the premium-grade steel construction resists wear and fatigue. The W33 lubrication system simplifies maintenance by extending relubrication intervals, making it cost-effective for hard-to-access installations. Additionally, the bearing's tolerance for misalignment (up to 3 degrees) compensates for shaft deflections caused by thermal expansion or mounting errors. These features make it a top choice for mining equipment, cement kilns, and paper mill machinery, where reliability and longevity are paramount.

Key Applications Across Multiple Industries
The 239/900 CAK/W33 spherical roller bearing is widely used in sectors requiring heavy-load support and operational resilience. In the mining industry, it powers crushers, vibrating screens, and conveyor systems. For energy production, it supports wind turbine gearboxes and hydroelectric generators. The bearing also excels in steel manufacturing, where it withstands extreme temperatures and contamination in rolling mills. Its ability to handle shock loads and misalignment makes it indispensable in construction machinery, such as cranes and excavators. Engineered to meet ISO standards, this bearing ensures optimal performance in harsh conditions, reducing maintenance costs and boosting productivity for industrial operators worldwid

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