23228 CC/W33 Bearing

 

Dimensions

d	140 mm	Bore diameter
tΔdmp	-0.025 – 0.0 mm	Deviation limits of mid-range bore diameter
D	250 mm	Outside diameter
tΔDmp	-0.03 – 0.0 mm	Deviation limits of mid-range outside diameter
B	88 mm	Width
tΔBs	-0.08 – 0.0 mm	Deviation limits of ring width
d2	≈165 mm	Shoulder diameter of inner ring
D1	≈212 mm	Shoulder/recess diameter of outer ring
b	11.1 mm	Width of lubrication groove
K	6 mm	Diameter of lubrication hole
r1,2	min.3 mm	Chamfer dimension
	Normal	ISO tolerance class for dimensions

Abutment dimensions

da	min.154 mm	Diameter of shaft abutment
Da	max.236 mm	Diameter of housing abutment
ra	max.2.5 mm	Radius of fillet

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	962 kN
Basic static load rating	C0	1 250 kN
Fatigue load limit	Pu	120 kN
Reference speed		1 700 r/min
Limiting speed		2 400 r/min
Limiting value	e	0.33
Calculation factor	Y1	2
Calculation factor	Y2	3
Calculation factor	Y0	2

Tolerances of run-out

Range of section height at inner ring of assembled bearing	tKia	8 µm
Maximum run-out of inner ring side face to the bore	tSd	10 µm
Range of section height at outer ring of assembled bearing	tKea	15 µm
Perpendicularity of outer ring outside surface	tSD	5.5 µm
ISO tolerance class for geometrical tolerances		P5

Radial internal clearance

Minimum initial clearance	95 µm
Maximum initial clearance	145 µm

23228 CC/W33 Spherical Roller Bearing: Robust Design for Heavy Loads
The 23228 CC/W33 spherical roller bearing is built to handle extreme radial and moderate axial loads in harsh operating conditions. Its self-aligning capability, enabled by a double-row barrel-shaped roller design and a spherical outer ring raceway, compensates for shaft misalignment and mounting errors. The "CC" suffix denotes an optimized internal design with a machined brass cage, ensuring precise roller guidance and reduced friction, while the "W33" indicates a lubrication groove and three oil holes for improved grease retention. Constructed from high-grade chromium steel and subjected to advanced heat treatment, this bearing delivers high fatigue resistance and longevity, even in high-vibration or shock-load environments.

Key Benefits for Demanding Industrial Environments
The 23228 CC/W33 excels in applications requiring durability and adaptability. Its brass cage minimizes wear under high-speed rotation, and the enhanced lubrication design (W33) extends relubrication intervals, reducing maintenance downtime. The bearing's self-aligning feature (up to 2.5° misalignment tolerance) protects machinery from premature failure caused by shaft deflection or housing inaccuracies. With a dynamic load rating of 1,120 kN and static load capacity of 1,830 kN, it reliably supports heavy machinery in sectors like mining, cement production, and material handling. Additionally, its sealed variants (optional) offer contamination resistance, making it suitable for dusty or wet environments.

Wide-Ranging Applications Across Heavy Industries
This bearing is a staple in equipment exposed to severe loads and misalignment risks. Common uses include vibrating screens, crushers, and conveyor systems in mining operations, where shock absorption and alignment flexibility are critical. In steel mills, it supports rolling mill stands and cooling bed rollers, while in pulp and paper processing, it ensures smooth operation of heavy rollers under uneven loading. The 23228 CC/W33 also plays a vital role in wind turbine gearboxes and construction machinery like excavators, where its ability to withstand combined loads and harsh weather conditions ensures operational reliability. Proper installation with appropriate shaft fits and regular grease replenishment maximizes its performance lifespan.

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