NJ 28/710 ECMA-Cylindrical roller bearing-FGFA bearings

NJ 28/710 ECMA 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	710 mm	Bore diameter
D	870 mm	Outside diameter
B	95 mm	Width
d₁	≈766 mm	Shoulder diameter of inner ring
D₁	≈817 mm	Shoulder diameter of outer ring
F	751 mm	Raceway diameter of inner ring
r_1,2	min.4 mm	Chamfer dimension
s	max.1.5 mm	Permissible axial displacement

Abutment dimensions

d_a	min.728 mm	Diameter of spacer sleeve
d_a	max.745 mm	Diameter of spacer sleeve
d_b	min.771 mm	Diameter of shaft abutment
D_a	max.853 mm	Diameter of housing abutment
r_a	max.3 mm	Radius of fillet
r_a	max.3 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	1 940 kN
Basic static load rating	C₀	5 000 kN
Fatigue load limit	P_u	375 kN
Reference speed		630 r/min
Limiting speed		850 r/min
Minimum load factor	k_r	0.15
Limiting value	e	0.3
Calculation factor	Y	0.4

Basic Parameters

Bearing Inner Diameter：710 mm
Bearing Outer Diameter：870 mm
Bearing Thickness：95 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.