51211-Thrust ball bearing-FGFA bearings

51211 Single direction thrust ball bearing

Thrust ball bearings are primarily designed to withstand axial loads, engineered to handle thrust forces during high-speed operation. They are incapable of bearing radial loads and have a relatively low maximum rotational speed. Offering straightforward installation and maintenance, they find extensive application in machinery such as machine tools, electric motors, cranes, and automotive gearboxes.

Dimensions

d	55mm	Bore diameter
D	90mm	Outside diameter
H	25mm	Height
d₁	≈ 90mm	Outside diameter shaft washer
D₁	≈ 57mm	Inner diameter housing washer
r_1,2	min. 1mm	Chamfer dimension washer

Abutment dimensions

d_a	min. 76mm	Abutment diameter shaft
D_a	max. 69mm	Abutment diameter housing
r_a	max. 1mm	Fillet radius

Calculation data

Basic dynamic load rating	C	58.5kN
Basic static load rating	C₀	134kN
Fatigue load limit	P_u	4.9kN
Reference speed		2 800r/min
Limiting speed		4 000r/min
Minimum load factor	A	0.11

Basic Parameters

Bearing Inner Diameter：55 mm
Bearing Outer Diameter：90 mm
Bearing Thickness：25 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.