319448 B-2LS-Cylindrical roller bearing-FGFA bearings

319448 B-2LS Double row full complement cylindrical roller bearing, NNF design, with integral sealing and 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	240 mm	Bore diameter
D	320 mm	Outside diameter
B	95 mm	Width
C	94 mm	Outer ring width (sealed bearing)
d₁	≈269.2 mm	Shoulder diameter inner ring
D₃	314 mm	Snap ring groove diameter at outer ring
C₁	83.2 mm	Distance between two snap ring grooves of the outer ring outside surface
	+0.2 mm	Tolerance for distance C₁
C₂	5.4 mm	Distance outer ring side face - snap ring groove (sealed bearing)
b	6.3 mm	Width snap ring groove outer ring
b₁	8 mm	Width annular lubrication groove outer ring
K	6 mm	Diameter lubrication hole (outer ring)
r	min.1.8 mm	Chamfer dimension (sealed bearing)
r_3,4	min.1 mm	Chamfer dimension

Abutment dimensions

d_a	min.247 mm	Abutment diameter shaft
d_as	265 mm	Abutment diameter shaft
C_a1	75 mm	Abutment width applying for SW snap rings (sealed brg.)
	–0.2 mm	Tolerance for abutment C_a (SW snap rings)
C_a2	71 mm	Abutment width applying for DIN 471 snap rings (sealed brg.)
	–0.2 mm	Tolerance for abutment C_a (DIN 471 snap rings)
r_a	max.1.5 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	952 kN
Basic static load rating	C₀	2 040 kN
Fatigue load limit	P_u	200 kN
Limiting speed		360 r/min
Minimum load factor	k_r	0.4

Associated products

Snap ring Seeger	SW 320
Snap ring in accordance with DIN 471	320x6

Tolerances: Normal
Axial internal clearance

Basic Parameters

Bearing Inner Diameter：240 mm
Bearing Outer Diameter：320 mm
Bearing Thickness：95 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.