BC2B 320117/HA4-Cylindrical roller bearing-FGFA bearings

BC2B 320117/HA4 Double row cylindrical roller bearing

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.

Design variant/feature

NNUB.3/C3WO

Dimensions

d	530 mm	Bore diameter
D	780 mm	Outside diameter
B	475 mm	Overall bearing width
C	285 mm	Width outer ring
D₁	≈699 mm	Shoulder diameter outer ring
F	590 mm	Raceway diameter inner ring
r_1,2	min.5 mm	Chamfer dimension outer ring
r_3,4	min.5 mm	Chamfer dimension inner ring
s	max.100 mm	Permissible axial displacement from the normal position of one bearing ring relative to the other

Abutment dimensions

d_a	min.550 mm	Abutment diameter spacer sleeve
d_a	max.582 mm	Abutment diameter spacer sleeve
d_b	min.595 mm	Abutment diameter shaft
D_a	max.760 mm	Abutment diameter spacer sleeve / housing
r_a	max.4 mm	Fillet radius
r_b	max.4 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	7 210 kN
Basic static load rating	C₀	17 300 kN
Fatigue load limit	P_u	1 290 kN
Reference speed		530 r/min
Limiting speed		800 r/min
Calculation factor	k_r	0.4

Tolerances: Normal, P6, P5
Radial internal clearance: cylindrical bore, tapered bore

Basic Parameters

Bearing Inner Diameter：530 mm
Bearing Outer Diameter：780 mm
Bearing Thickness：475 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.