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NNU49K Double Row Cylindrical Roller Bearings Series

The NNU49K double-row cylindrical roller bearings series adopts a double-row cylindrical roller arrangement. The rollers fit closely with the raceway and can bear large radial loads and bidirectional axial loads simultaneously, providing stable support for the equipment.

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	Type	Main dimensions			Rated load		Rated speed
					Dynamics	Static	Speed limit
Mail		d[mm]	D[mm]	B[mm]	C[kN]	C₀[kN]	[r/min]
	NNU49/500-K-S-M-SP	500	670	170	2330000.0	6100000.0	1030.0
	NNU4996-S-K-M-SP	480	650	170	2350000.0	6100000.0	1060.0
	NNU4992-S-K-M-SP	460	620	160	2110000.0	5500000.0	1120.0
	NNU4988-S-K-M-SP	440	600	160	2040000.0	5200000.0	1150.0
	NNU4984-S-K-M-SP	420	560	140	1530000.0	4000000.0	1290.0
	NNU4980-S-K-M-SP	400	540	140	1490000.0	3800000.0	1330.0
	NNU4976-S-K-M-SP	380	520	140	1440000.0	3600000.0	1380.0
	NNU4972-S-K-M-SP	360	480	118	1130000.0	2800000.0	1540.0
	NNU4968-S-K-M-SP	340	460	118	1100000.0	2650000.0	1600.0
	NNU4964-S-K-M-SP	320	440	118	1070000.0	2550000.0	1670.0
	NNU4960-S-K-M-SP	300	420	118	1040000.0	2380000.0	1740.0
	NNU4956-S-K-M-SP	280	380	100	770000.0	1790000.0	1970.0
	NNU4952-S-K-M-SP	260	360	100	750000.0	1690000.0	2070.0
	NNU4948-S-K-M-SP	240	320	80	530000.0	1210000.0	2400.0
	NNU4944-S-K-M-SP	220	300	80	510000.0	1140000.0	2550.0
	NNU4940-S-K-M-SP	200	280	80	490000.0	1040000.0	2700.0
	NNU4938-S-K-M-SP	190	260	69	410000.0	880000.0	2900.0
	NNU4936-S-K-M-SP	180	250	69	405000.0	860000.0	3000.0
	NNU4934-S-K-M-SP	170	230	60	340000.0	700000.0	3300.0
	NNU4932-S-K-M-SP	160	220	60	335000.0	680000.0	3400.0

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Dentail

Double-row Cylindrical Roller Arrangement：The NNU49K double-row cylindrical roller bearings series adopts a double-row cylindrical roller arrangement. The rollers fit closely with the raceway and can bear large radial loads and bidirectional axial loads simultaneously, providing stable support for the equipment.
Precision Ring Process：The inner and outer rings have gone through a series of high-precision processing procedures such as forging, fine grinding, and heat treatment. They possess excellent dimensional accuracy and surface hardness, ensuring precise cooperation with the rollers and reducing operational wear.
High-quality Cage Design：The cage is mostly made of high-strength engineering plastics or special alloy materials. Its structure is optimized to accurately guide the movement of the rollers, avoid collisions and friction between the rollers, and maintain the smooth operation of the bearing.

Application

The bearings can be used in the following industries

Heavy-duty Machine Tool Manufacturing：Used in the spindle systems of large CNC lathes and boring machines, bearing huge loads during machining and ensuring machining accuracy and surface quality.
Metallurgical Industry Equipment：In metallurgical equipment such as rolling mills and continuous casters, it copes with high temperature, heavy loads, and complex force actions, ensuring the stable operation of the equipment.
Wind Power Equipment Field：The spindle bearing part of wind turbines adopts this series, adapting to the changeable outdoor environment, bearing various loads during the operation of the wind turbine, and ensuring power generation efficiency.