NUP 306 ECNJ-Cylindrical roller bearing-FGFA bearings

NUP 306 ECNJ Single row cylindrical roller bearing, NUP design, with snap ring groove

Cylindrical roller bearings feature cylindrical rollers as rolling elements and are classified as separable bearings. The rollers and raceways engage in line contact, enabling high load-carrying capacity. Primarily designed to accommodate radial loads, these bearings exhibit minimal friction between the rolling elements and the flange of the bearing ring, making them suitable for high-speed rotation. They offer exceptional load-carrying capability and maximum rotational speeds.

Dimensions

d	30 mm	Bore diameter
D	72 mm	Outside diameter
B	19 mm	Width
d₁	≈45 mm	Shoulder diameter of inner ring
D₁	≈58.35 mm	Shoulder diameter of outer ring
D₃	68.81 mm	Diameter of snap ring groove
F	40.5 mm	Raceway diameter of inner ring
C₂	3.28 mm	Distance from outer ring side face to snap ring groove
b	1.9 mm	Width of snap ring groove
r_1,2	min.1.1 mm	Chamfer dimension
r_3,4	min.1.1 mm	Chamfer dimension of loose flange ring

Abutment dimensions

d_a	min.37 mm	Diameter of spacer sleeve
d_b	min.47 mm	Diameter of shaft abutment
D_a	max.65.1 mm	Diameter of housing abutment
r_a	max.1 mm	Radius of fillet

Calculation data

FGFA performance class		FGFA Explorer
Basic dynamic load rating	C	58.5 kN
Basic static load rating	C₀	48 kN
Fatigue load limit	P_u	6.2 kN
Reference speed		11 000 r/min
Limiting speed		12 000 r/min
Minimum load factor	k_r	0.15
Limiting value	e	0.2
Calculation factor	Y	0.6

Basic Parameters

Bearing Inner Diameter：30 mm
Bearing Outer Diameter：72 mm
Bearing Thickness：19 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.