330758 BG- Tapered roller bearing-FGFA bearings

330758 BG Four-row tapered roller bearing

Tapered roller bearings are of the separable type, comprising an inner ring, outer ring, tapered rollers, and a cage. Through the matching of tapered raceways and rollers, they can simultaneously withstand substantial radial loads and unidirectional axial loads. Characterised by high load-carrying capacity and rigidity, they find extensive application in automotive hubs, machine tool spindles, construction machinery, mining equipment, and similar scenarios.

Design variant/feature	TQO/GWI
Bore type	Cylindrical with helical groove

Dimensions

d	304.902 mm	Bore diameter
D	412.648 mm	Outside diameter
B	266.7 mm	Total bearing width over inner rings
T	266.7 mm	Total bearing width over outer rings
d₁	≈326 mm	Abutment diameter shaft
D₁	≈379 mm	Abutment diameter housing
r_1,2	min.3.3 mm	Chamfer dimension inner ring
r_3,4	min.3.3 mm	Outer ring radius (chamfer)

Calculation data

Basic dynamic load rating	C	2 970 kN
Basic static load rating	C₀	7 500 kN
Fatigue load limit	P_u	640 kN
Comparative radial load rating	C_F	780 kN
Comparative axial load rating	C_Fa	122 kN
Thrust factor	K	1.83
Limiting value	e	0.31
Calculation factor	Y₁	2.2
Calculation factor	Y₂	3.3
Calculation factor	Y₀	2.2

Tolerances: bearings (Normal and CL7C), inch bearings
Internal clearance

Basic Parameters

Bearing Inner Diameter：304.902 mm
Bearing Outer Diameter：412.648 mm
Bearing Thickness：266.7 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.