NU 2256 ECMA-Cylindrical roller bearing-FGFA bearings

NU 2256 ECMA Single row cylindrical roller bearing, NU design

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	280 mm	Bore diameter
D	500 mm	Outside diameter
B	130 mm	Width
D₁	≈433 mm	Shoulder diameter of outer ring
F	333 mm	Raceway diameter of inner ring
r_1,2	min.5 mm	Chamfer dimension
s	max.10.2 mm	Permissible axial displacement

Abutment dimensions

d_a	min.300 mm	Diameter of spacer sleeve
d_a	max.320 mm	Diameter of spacer sleeve
d_b	min.331 mm	Diameter of shaft abutment
D_a	max.480 mm	Diameter of housing abutment
r_a	max.4 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	2 200 kN
Basic static load rating	C₀	3 450 kN
Fatigue load limit	P_u	305 kN
Reference speed		1 200 r/min
Limiting speed		1 900 r/min
Minimum load factor	k_r	0.2
Limiting value	e	0.3
Calculation factor	Y	0.4

Basic Parameters

Bearing Inner Diameter：280 mm
Bearing Outer Diameter：500 mm
Bearing Thickness：130 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.