NNCF 4956 CV-Cylindrical roller bearing-FGFA bearings

NNCF 4956 CV Double row full complement cylindrical roller bearing, NNCF design, with relubrication feature

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	280 mm	Bore diameter
D	380 mm	Outside diameter
B	100 mm	Width
d₁	≈317 mm	Shoulder diameter inner ring
D₁	≈343 mm	Shoulder diameter outer ring
b₁	9.4 mm	Width annular lubrication groove outer ring
K	5 mm	Diameter lubrication hole (outer ring)
s	max.6 mm	Permissible axial displacement from the normal position of one bearing ring relative to the other
r_1,2	min.2.1 mm	Chamfer dimension (open bearings)
r_3,4	min.2.1 mm	Chamfer dimension

Abutment dimensions

d_a	min.293 mm	Abutment diameter shaft
d_as	312 mm	Abutment diameter shaft
D_a	max.368 mm	Abutment diameter housing
r_a	max.2 mm	Fillet radius
r_b	max.2 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	1 210 kN
Basic static load rating	C₀	2 700 kN
Fatigue load limit	P_u	255 kN
Reference speed		700 r/min
Limiting speed		900 r/min
Minimum load factor	k_r	0.25

Tolerances: Normal
Axial internal clearance

Basic Parameters

Bearing Inner Diameter：280 mm
Bearing Outer Diameter：380 mm
Bearing Thickness：100 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.