331555 B- Tapered roller bearing-FGFA bearings

331555 B Double row tapered roller bearing, TDI design

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	TDIS/N1Y
Bore type	Cylindrical

Dimensions

d	635 mm	Bore diameter
D	939.8 mm	Outside diameter
T	304.8 mm	Total width
B	304.8 mm	Width of inner ring
d₁	694.35 mm	Shoulder diameter of inner ring (small side face)
D₁	777.321 mm	Raceway diameter of outer ring (small side face)
b	70.3 mm	Inner ring locating slot width
h	50.8 mm	Inner ring locating slot depth
r_3,4	min.6.4 mm	Chamfer dimension of outer ring

Calculation data

Basic dynamic load rating	C	6 710 kN
Basic static load rating	C₀	16 600 kN
Fatigue load limit	P_u	1 100 kN
Limiting value	e	0.88
Calculation factor	Y₁	0.77
Calculation factor	Y₂	1.15
Calculation factor	Y₀	0.8
Comparative radial load rating	C_F	1 660 kN
Comparative axial load rating	C_Fa	1 420 kN
Thrust factor	K	0.67

Tolerances:
bearings: Normal and CL7C, P5
inch bearings: Normal and CL
Internal clearance

Basic Parameters

Bearing Inner Diameter：635 mm
Bearing Outer Diameter：939.8 mm
Bearing Thickness：304.8 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.