NJ 2248 MA-Cylindrical roller bearing-FGFA bearings

NJ 2248 MA Single row cylindrical roller bearing, NJ 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	240 mm	Bore diameter
D	440 mm	Outside diameter
B	120 mm	Width
d₁	≈313 mm	Shoulder diameter of inner ring
D₁	≈365 mm	Shoulder diameter of outer ring
F	295 mm	Raceway diameter of inner ring
r_1,2	min.4 mm	Chamfer dimension
s	max.4.3 mm	Permissible axial displacement

Abutment dimensions

d_a	min.257 mm	Diameter of spacer sleeve
d_a	max.284 mm	Diameter of spacer sleeve
d_b	min.317 mm	Diameter of shaft abutment
D_a	max.423 mm	Diameter of housing abutment
r_a	max.3 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	1 450 kN
Basic static load rating	C₀	2 360 kN
Fatigue load limit	P_u	224 kN
Reference speed		1 500 r/min
Limiting speed		2 200 r/min
Minimum load factor	k_r	0.2
Limiting value	e	0.3
Calculation factor	Y	0.4

Basic Parameters

Bearing Inner Diameter：240 mm
Bearing Outer Diameter：440 mm
Bearing Thickness：120 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.