NJ 305 ECML-Cylindrical roller bearing-FGFA bearings

NJ 305 ECML Single row cylindrical roller bearing, NJ design

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	25 mm	Bore diameter
D	62 mm	Outside diameter
B	17 mm	Width
d₁	≈38.1 mm	Shoulder diameter of inner ring
D₁	≈50.65 mm	Shoulder diameter of outer ring
F	34 mm	Raceway diameter of inner ring
r_1,2	min.1.1 mm	Chamfer dimension
r_3,4	min.1.1 mm	Chamfer dimension
s	max.1.3 mm	Permissible axial displacement

Abutment dimensions

d_a	min.31 mm	Diameter of spacer sleeve
d_a	max.32.5 mm	Diameter of spacer sleeve
d_b	min.40 mm	Diameter of shaft abutment
D_a	max.54.9 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	46.5 kN
Basic static load rating	C₀	36.5 kN
Fatigue load limit	P_u	4.55 kN
Reference speed		12 000 r/min
Limiting speed		22 000 r/min
Minimum load factor	k_r	0.23
Limiting value	e	0.2
Calculation factor	Y	0.6

Associated products

Angle ring

HJ 305 EC

Basic Parameters

Bearing Inner Diameter：25 mm
Bearing Outer Diameter：62 mm
Bearing Thickness：17 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.