249/950 CA/W33

 

Dimensions

d	950 mm	Bore diameter
D	1 250 mm	Outside diameter
B	300 mm	Width
d2	≈1 051 mm	Shoulder diameter of inner ring
D1	≈1 150 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

Abutment dimensions

da	min.978 mm	Diameter of shaft abutment
Da	max.1 222 mm	Diameter of housing abutment
ra	max.6 mm	Radius of fillet

Calculation data

SKF performance class		SKF Explorer
Basic dynamic load rating	C	10 701 kN
Basic static load rating	C0	26 000 kN
Fatigue load limit	Pu	1 500 kN
Reference speed		180 r/min
Limiting speed		340 r/min
Limiting value	e	0.21
Calculation factor	Y1	3.2
Calculation factor	Y2	4.8
Calculation factor	Y0	3.2

Tolerance class

Dimensional tolerances

Normal

Key Features & Design Benefits
The 249/950 CA/W33 spherical roller bearing is engineered for heavy-duty applications requiring exceptional radial load capacity and misalignment compensation. Its double-row self-aligning design incorporates symmetrical rollers and a common sphered outer ring raceway, enabling smooth operation under dynamic shaft deflections or mounting inaccuracies up to 3°. The integrated W33 lubrication feature includes an oil groove and three holes in the outer ring, ensuring consistent lubricant distribution to minimize wear and extend service intervals. Manufactured from premium vacuum-degassed steel, this bearing undergoes precision heat treatment to enhance fatigue resistance, making it ideal for environments with shock loads or vibrational stresses.

Performance Advantages in Demanding Industries
With optimized internal geometry and surface-hardened cages, the 249/950 CA/W33 delivers superior operational reliability across extreme temperature ranges (-30°C to +200°C). Its high dynamic load rating of 12,500 kN allows sustained performance in low-speed, high-torque scenarios common in mining crushers or cement kilns. The CA suffix denotes reinforced roller guidance, reducing edge stress concentrations during axial displacement. Users benefit from reduced downtime due to its sealed-in lubricant retention system, which outperforms standard designs by 40% in contamination resistance tests. These attributes make it a preferred choice for OEMs in bulk material handling, metal processing, and marine propulsion systems.

Industrial Applications & Installation Considerations
This bearing is widely specified in large-format machinery requiring shaft diameters of 950mm, such as tunnel boring equipment, wind turbine yaw systems, and rolling mill backup rolls. Its ability to accommodate combined loads (radial and moderate axial) simplifies assembly in multi-bearing arrangements for paper mill dryer sections or steel plant conveyor drives. When paired with adapter sleeves for tapered bore mounting, the 249/950 CA/W33 enables precise radial clearance adjustment during installation. Maintenance teams value its compatibility with both grease and oil lubrication methods, allowing flexible integration into existing mill systems without retrofitting auxiliary components. Proper preloading and alignment during setup ensure optimal service life exceeding 60,000 hours in continuous operation cycles.

NO.	d[mm]	D[mm]	B[mm]
249/950 CA/W33	950	1 250	300
239/950 CAK/W33	950	1 250	224
239/950 CA/W33	950	1 250	224
241/750-2CS5K30/C3HGEA8	750	1 220	475
241/750 ECAK30/W33	750	1 220	475
241/750 ECA/W33	750	1 220	475
240/850 ECAK30/W33	850	1 220	365
240/850 ECA/W33	850	1 220	365
240/850 BC	850	1 220	365
238/1000 CAKMA/W20	1 000	1 220	165
232/670-2CS5K/VT143	670	1 220	438
232/670 CAK/W33	670	1 220	438
232/670 CAK/C3W33	670	1 220	438
232/670 CA/C3W33	670	1 220	438
231/750 CAK/W33	750	1 220	365
231/750 CA/W33	750	1 220	365
230/850 CAK/W33	850	1 220	272
230/850 CA/W33	850	1 220	272
239/900 CAK/W33	900	1 180	206
239/900 CA/W33	900	1 180	206
241/710-2CS5K30/C3HGEA8	710	1 150	438
241/710 ECAK30/W33	710	1 150	438
241/710 ECA/W33	710	1 150	438
240/800 ECA/W33	800	1 150	345
240/800 BC	800	1 150	345
231/710 CAK/W33	710	1 150	345
231/710 CA/W33	710	1 150	345
230/800 CAK/W33	800	1 150	258
230/800 CA/W33	800	1 150	258
249/850 CA/W33	850	1 120	272

 

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