NKS 55-Needle roller bearing-FGFA bearings

NKS 55 Needle roller bearing, single row, with a flange, without inner ring, with solid rings

Needle roller bearings are compact transmission components utilising slender needle rollers as rolling elements. Their core advantages lie in their small size and high radial load capacity – within equivalent installation space, they far exceed the load-bearing capacity of standard ball bearings while offering a compact structure that significantly reduces equipment footprint. Suitable for medium-to-low speed applications, they exhibit impact resistance, stable transmission efficiency, and facilitate straightforward installation and maintenance.

Dimensions

F_w	55 mm	Diameter under rollers
D	72 mm	Outside diameter
C	22 mm	Width
r_1,2	min.1 mm	Chamfer dimension outer ring

Abutment dimensions

D_a	max.67 mm	Diameter of housing abutment
r_a	max.1 mm	Fillet radius

Calculation data

FGFA performance class		FGFA Explorer
Basic dynamic load rating	C	52 kN
Basic static load rating	C₀	78 kN
Fatigue load limit	P_u	10 kN
Reference speed		7 000 r/min
Limiting speed		8 000 r/min

Associated seals

55x72x8 HMS5 RG

Radial shaft seal

Basic Parameters

Bearing Inner Diameter：55 mm
Bearing Outer Diameter：72 mm
Bearing Thickness：22 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.