BT4B 332997/HA1- Tapered roller bearing-FGFA bearings

BT4B 332997/HA1 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	TQIT
Bore type	Tapered 1:12

Dimensions

d	287.5 mm	Bore diameter (large diameter of tapered bore)
D	440 mm	Outside diameter
B	330.3 mm	Total bearing width over inner rings
T	284 mm	Total bearing width over outer rings
d₁	≈349 mm	Abutment diameter shaft
D₁	≈416 mm	Abutment diameter housing
r_1,2	min.4 mm	Inner ring radius (chamfer)
r_3,4	min.1 mm	Chamfer dimension outer ring

Calculation data

Basic dynamic load rating	C	4 180 kN
Basic static load rating	C₀	8 500 kN
Fatigue load limit	P_u	720 kN
Comparative radial load rating	C_F	1 120 kN
Comparative axial load rating	C_Fa	193 kN
Thrust factor	K	1.68
Limiting value	e	0.35
Calculation factor	Y₁	1.9
Calculation factor	Y₂	2.9
Calculation factor	Y₀	1.8

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

Basic Parameters

Bearing Inner Diameter：287.5 mm
Bearing Outer Diameter：440 mm
Bearing Thickness：330.3 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.