331640 A- Tapered roller bearing-FGFA bearings

331640 A Double row tapered roller bearing, TDO 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

TDO/DC

Dimensions

d	558.8 mm	Bore diameter
D	736.6 mm	Outside diameter
T	225.425 mm	Total width
C	177.8 mm	Width of outer ring
d₁	639.6 mm	Shoulder diameter of inner ring (large side face)
D₁	706.752 mm	Raceway diameter of outer ring (large side face)
r_1,2	min.6.4 mm	Chamfer dimension of inner ring
r_3,4	min.1.5 mm	Chamfer dimension of outer ring
a	255 mm	Distance between pressure points

Calculation data

Basic dynamic load rating	C	4 290 kN
Basic static load rating	C₀	11 600 kN
Fatigue load limit	P_u	815 kN
Limiting value	e	0.35
Calculation factor	Y₁	1.9
Calculation factor	Y₂	2.9
Calculation factor	Y₀	1.8
Comparative radial load rating	C_F	1 060 kN
Comparative axial load rating	C_Fa	355 kN
Thrust factor	K	1.69

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

Basic Parameters

Bearing Inner Diameter：558.8 mm
Bearing Outer Diameter：736.6 mm
Bearing Thickness：225.425 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.