NU 2268 N2MA-Cylindrical roller bearing-FGFA bearings

NU 2268 N2MA Single row cylindrical roller bearing

Cylindrical roller bearings feature cylindrical rollers as rolling elements and are classified as separable bearings. The rollers and raceways engage in line contact, enabling high load-carrying capacity. Primarily designed to accommodate radial loads, these bearings exhibit minimal friction between the rolling elements and the flange of the bearing ring, making them suitable for high-speed rotation. They offer exceptional load-carrying capability and maximum rotational speeds.

Dimensions

d	340 mm	Bore diameter
D	620 mm	Outside diameter
B	165 mm	Width
D₁	≈515 mm	Shoulder diameter of outer ring
F	416 mm	Raceway diameter of inner ring
b₁	15.5 mm	Width of locating slot
h	20 mm	Depth of locating slot
r_1,2	min.6 mm	Chamfer dimension
r_3,4	min.6 mm	Chamfer dimension
s	max.8 mm	Permissible axial displacement

Abutment dimensions

d_a	min.366 mm	Diameter of spacer sleeve
d_a	max.401 mm	Diameter of spacer sleeve
d_b	min.421 mm	Diameter of shaft abutment
D_a	max.594 mm	Diameter of housing abutment
r_a	max.5 mm	Radius of fillet
r_a	max.5 mm	Radius of fillet
r_b	max.5 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	2 640 kN
Basic static load rating	C₀	4 500 kN
Fatigue load limit	P_u	365 kN
Reference speed		1 000 r/min
Limiting speed		1 200 r/min
Minimum load factor	k_r	0.3
Limiting value	e	0.3
Calculation factor	Y	0.4

Basic Parameters

Bearing Inner Diameter：340 mm
Bearing Outer Diameter：620 mm
Bearing Thickness：165 mm

Wafangdian Fafuge Bearing Co., Ltd., rooted in Wafangdian Bearing Industry Base, is an emerging professional bearing manufacturer. Drawing on the base’s profound industrial heritage, we have upheld craftsmanship since inception, integrated precision manufacturing into R&D and production, and focused on the R&D and refined production of spherical roller bearings.