NU 20/850 ECMA-Cylindrical roller bearing-FGFA bearings

NU 20/850 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	850 mm	Bore diameter
D	1 220 mm	Outside diameter
B	212 mm	Width
D₁	≈1 110 mm	Shoulder diameter of outer ring
F	942 mm	Raceway diameter of inner ring
r_1,2	min.7.5 mm	Chamfer dimension
s	max.2 mm	Permissible axial displacement

Abutment dimensions

d_a	min.878 mm	Diameter of spacer sleeve
d_a	max.936 mm	Diameter of spacer sleeve
d_b	min.956 mm	Diameter of shaft abutment
D_a	max.1 190 mm	Diameter of housing abutment
r_a	max.6 mm	Radius of fillet
r_a	max.6 mm	Radius of fillet
r_b	max.6 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	8 420 kN
Basic static load rating	C₀	18 600 kN
Fatigue load limit	P_u	1 200 kN
Reference speed		360 r/min
Limiting speed		560 r/min
Minimum load factor	k_r	0.17
Limiting value	e	0.3
Calculation factor	Y	0.4

Basic Parameters

Bearing Inner Diameter：850 mm
Bearing Outer Diameter：1220 mm
Bearing Thickness：212 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.