NK 12/12-Needle roller bearing-FGFA bearings

NK 12/12 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	12 mm	Diameter under rollers
D	19 mm	Outside diameter
C	12 mm	Width
r_1,2	min.0.3 mm	Chamfer dimension outer ring

Abutment dimensions

D_a	max.17 mm	Diameter of housing abutment
r_a	max.0.3 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	6.71 kN
Basic static load rating	C₀	8.15 kN
Fatigue load limit	P_u	0.965 kN
Reference speed		26 000 r/min
Limiting speed		30 000 r/min

Associated seals

G 12x19x3	Radial shaft seal with a low cross-sectional height, single lip
SD 12x19x3	Radial shaft seal with a low cross-sectional height, double lip

Basic Parameters

Bearing Inner Diameter：12 mm
Bearing Outer Diameter：19 mm
Bearing Thickness：12 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.