NU 20/630 ECMA-Cylindrical roller bearing-FGFA bearings

NU 20/630 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	630 mm	Bore diameter
D	920 mm	Outside diameter
B	170 mm	Width
D₁	≈832 mm	Shoulder diameter of outer ring
F	699 mm	Raceway diameter of inner ring
r_1,2	min.7.5 mm	Chamfer dimension
s	max.8.7 mm	Permissible axial displacement

Abutment dimensions

d_a	min.658 mm	Diameter of spacer sleeve
d_a	max.690 mm	Diameter of spacer sleeve
d_b	min.705 mm	Diameter of shaft abutment
D_a	max.892 mm	Diameter of housing abutment
r_a	max.6 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	4 730 kN
Basic static load rating	C₀	9 500 kN
Fatigue load limit	P_u	670 kN
Reference speed		560 r/min
Limiting speed		850 r/min
Minimum load factor	k_r	0.14
Limiting value	e	0.3
Calculation factor	Y	0

Basic Parameters

Bearing Inner Diameter：630 mm
Bearing Outer Diameter：920 mm
Bearing Thickness：170 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.