BC2-8074/HA5-Cylindrical roller bearing-FGFA bearings

BC2-8074/HA5 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

NNU.3/CNW33

Dimensions

d	690 mm	Bore diameter
D	980 mm	Outside diameter
B	365 mm	Overall bearing width
D₁	≈894 mm	Shoulder diameter outer ring
F	759 mm	Raceway diameter inner ring
b	25.3 mm	Width of annular groove
K	15 mm	Diameter lubrication hole
r_1,2	min.7.5 mm	Chamfer dimension outer ring
r_3,4	min.7.5 mm	Chamfer dimension inner ring
s	max.9.5 mm	Permissible axial displacement from the normal position of one bearing ring relative to the other

Abutment dimensions

d_a	min.718 mm	Abutment diameter spacer sleeve
d_a	max.750 mm	Abutment diameter spacer sleeve
d_b	min.785 mm	Abutment diameter shaft
D_a	max.952 mm	Abutment diameter spacer sleeve / housing
r_a	max.6 mm	Fillet radius
r_b	max.6 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	10 500 kN
Basic static load rating	C₀	27 000 kN
Fatigue load limit	P_u	1 830 kN
Reference speed		400 r/min
Limiting speed		600 r/min
Calculation factor	k_r	0.38

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

Basic Parameters

Bearing Inner Diameter：690 mm
Bearing Outer Diameter：980 mm
Bearing Thickness：365 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.