NNC 4844 CV-Cylindrical roller bearing-FGFA bearings

NNC 4844 CV Double row cylindrical roller bearing

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	220 mm	Bore diameter
D	270 mm	Outside diameter
B	50 mm	Width
d₁	≈241 mm	Shoulder diameter inner ring
D₁	≈250.5 mm	Shoulder diameter outer ring
b₁	7 mm	Width annular lubrication groove outer ring
K	4 mm	Diameter lubrication hole (outer ring)
r_1,2	min.1.5 mm	Chamfer dimension (open bearings)

Abutment dimensions

d_a	min.227 mm	Abutment diameter shaft
d_as	233 mm	Abutment diameter shaft
D_a	max.263 mm	Abutment diameter housing
r_a	max.1.5 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	352 kN
Basic static load rating	C₀	865 kN
Fatigue load limit	P_u	85 kN
Reference speed		1 000 r/min
Limiting speed		1 200 r/min
Minimum load factor	k_r	0.2

Tolerances: Normal
Axial internal clearance

Basic Parameters

Bearing Inner Diameter：220 mm
Bearing Outer Diameter：270 mm
Bearing Thickness：50 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.