7308 BEGAPH-Angular contact ball bearing-FGFA bearings

7308 BEGAPH Single row angular contact ball bearing

Angular contact ball bearings can simultaneously accommodate radial and axial loads. They are capable of operating at high rotational speeds. The greater the contact angle, the higher the axial load capacity. High-precision and high-speed bearings typically employ a 15-degree contact angle. Under axial force, the contact angle increases.

Dimensions

d	40 mm	Bore diameter
D	90 mm	Outside diameter
B	23 mm	Width
d₁	≈59.7 mm	Shoulder diameter of inner ring (large side face)
d₂	≈49.55 mm	Shoulder diameter of inner ring (small side face)
D₁	≈71.6 mm	Shoulder diameter of outer ring (large side face)
a	39 mm	Distance side face to pressure point
r_1,2	min.1.5 mm	Chamfer dimension
r_3,4	min.1 mm	Chamfer dimension

Abutment dimensions

d_a	min.49 mm	Diameter of shaft abutment
D_a	max.81 mm	Abutment diameter housing
D_b	max.84.4 mm	Diameter of housing abutment
r_a	max.1.5 mm	Radius of fillet
r_b	max.1 mm	Radius of fillet

Calculation data

performance class		Explorer
Basic dynamic load rating	C	50 kN
Basic static load rating	C₀	32.5 kN
Fatigue load limit	P_u	1.37 kN
Reference speed		9 500 r/min
Limiting speed		10 000 r/min
Minimum axial load factor	A	0.0173
Minimum radial load factor	k_r	0.1
Limiting value	e	1.14

Single bearing or bearing pair arranged in tandem
Calculation factor (single, tandem)	X	0.35
Calculation factor (single, tandem)	Y₀	0.26
Calculation factor (single, tandem)	Y₂	0.57

Bearing pair arranged back-to-back or face-to-face
Calculation factor (back-to-back, face-to-face)	X	0.57
Calculation factor (back-to-back, face-to-face)	Y₀	0.52
Calculation factor (back-to-back, face-to-face)	Y₁	0.55
Calculation factor (back-to-back, face-to-face)	Y₂	0.93

Tolerances: Normal ( ), P6, P5, Normal (inch)
Internal clearance: CA+CB+CC, G
Preload: GA+GB+GC

Basic Parameters

Bearing Inner Diameter：40 mm
Bearing Outer Diameter：90 mm
Bearing Thickness：23 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.