M 249747/710- Tapered roller bearing-FGFA bearings

M 249747/710 Single 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.

Dimension series

M 249700

Dimensions

d	257.175 mm	Bore diameter
D	358.775 mm	Outside diameter
T	71.438 mm	Total width
d₁	≈303.4 mm	Shoulder diameter of inner ring
B	76.2 mm	Width of inner ring
C	53.975 mm	Width of outer ring
r_1,2	min.1.5 mm	Chamfer dimension of inner ring
r_3,4	min.3.3 mm	Chamfer dimension of outer ring
a	64.003 mm	Distance side face to pressure point

Abutment dimensions

d_a	max.276 mm	Diameter of shaft abutment
d_b	min.270.5 mm	Diameter of shaft abutment
D_a	min.326 mm	Diameter of housing abutment
D_a	max.343 mm	Diameter of housing abutment
D_b	min.343 mm	Diameter of housing abutment
C_a	min.11 mm	Minimum width of space required in housing on large side face
C_b	min.17 mm	Minimum width of space required in housing on small side face
r_a	max.1.5 mm	Radius of shaft fillet
r_b	max.3.3 mm	Radius of housing fillet

Calculation data

FGFA performance class		FGFA Explorer
Basic dynamic load rating	C	1 030 kN
Basic static load rating	C₀	1 760 kN
Fatigue load limit	P_u	156 kN
Reference speed		1 300 r/min
Limiting speed		1 600 r/min
Limiting value	e	0.33
Calculation factor	Y	1.8
Calculation factor	Y₀	1

Basic Parameters

Bearing Inner Diameter：257.175 mm
Bearing Outer Diameter：358.775 mm
Bearing Thickness：76.2 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.