NN3044MBKRE44CC1P4 NSK Precision Double Row Cylindrical Roller Bearing with Tapered Bore 220x340x90mm - 2-3 Day Delivery

Cylindrical roller bearings support only radial loads, but have the advantage of a larger radial load capacity than ACBBs. Double row cylindrical roller bearings (NN and NNU types) and single row cylindrical roller bearings (N type) are available. In general, double row cylindrical roller bearings are used for high rigidity applications such as lathes, while single row cylindrical roller bearings are used in high-speed applications such as machining centers. The following graphs display the effect of internal radial clearance on the performance of cylindrical roller bearings.

Boundary Dimensions

	NN: Inner ring rib type		Bearing Type
d	220	mm	Bore diameter
D	340	mm	Outside diameter
B	90	mm	Width
r(min.)	3	mm	Chamfer Dimension

Basic Load Ratings

Cr	940	kN	Basic Dynamic Load Rating
C0r	1480	kN	Basic Static Load Rating

Speeds

Grease	2400	min-1	Limiting Speed
Oil (Oil-air)	2900	min-1	Limiting Speed

Dimensions

Ew	310	mm	Roller Circumscribed Circle Diameters
s	3.2	mm	Axial Displacement

Abutment and Fillet Dimensions

da(min.)	233	mm	Diameter of Shaft Abutment
d1a(min.)	236	mm	Diameter of Shaft Abutment
Da(min.)	313	mm	Diameter of Housing Abutment
Da(max.)	327	mm	Diameter of Housing Abutment
ra(max.)	2.5	mm	Radius of Shaft or Housing Fillet

Additional information

CC1(max.)	50	μm	Clearance in Bearings with Cylindrical Bores
CC1(min.)	15	μm	Clearance in Bearings with Cylindrical Bores
CC1(max.)	90	μm	Clearance in Bearings with Tapered Bores
CC1(min.)	45	μm	Clearance in Bearings with Tapered Bores
CC0(max.)	60	μm	Clearance in Bearings with Tapered Bores
CC0(min.)	35	μm	Clearance in Bearings with Tapered Bores
CC9(max.)	45	μm	Clearance in Bearings with Tapered Bores
CC9(min.)	20	μm	Clearance in Bearings with Tapered Bores
	94	g/brg	Recommended Grease Quantities

Mass

27.7

kg

Mass(approx.)