23256 CCK/W33- Spherical roller bearings-FGFA bearings

23256 CCK/W33 Spherical roller bearing with tapered bore and relubrication features

Self-aligning roller bearings are heavy-duty transmission components featuring automatic self-alignment. Their core comprises an inner ring, outer ring, barrel-shaped rollers, and a cage. They offer high load-carrying capacity, capable of simultaneously withstanding substantial radial loads and minor axial loads. These bearings exhibit excellent impact resistance, stable operation, and suitability for medium-to-low speed, heavy-load applications. They demonstrate low wear and extended service life.

Bore type

Tapered 1:12

Dimensions

d	280 mm	Bore diameter
t_Δdmp	0.0 – 0.052 mm	Deviation limits of mid-range bore diameter
t_ΔSL	0.0 – 0.052 mm	Deviation limits of tapered slope
D	500 mm	Outside diameter
t_ΔDmp	-0.045 – 0.0 mm	Deviation limits of mid-range outside diameter
B	176 mm	Width
t_ΔBs	-0.1 – 0.0 mm	Deviation limits of ring width
d₂	≈332 mm	Shoulder diameter of inner ring
D₁	≈429 mm	Shoulder/recess diameter of outer ring
b	22.3 mm	Width of lubrication groove
K	12 mm	Diameter of lubrication hole
r_1,2	min.5 mm	Chamfer dimension
	Normal	ISO tolerance class for dimensions

Abutment dimensions

D_a	max.480 mm	Diameter of housing abutment
r_a	max.4 mm	Radius of fillet

Calculation data

FGFA performance class		FGFA Explorer
Basic dynamic load rating	C	3 425 kN
Basic static load rating	C₀	4 900 kN
Fatigue load limit	P_u	360 kN
Reference speed		800 r/min
Limiting speed		1 100 r/min
Limiting value	e	0.35
Calculation factor	Y₁	1.9
Calculation factor	Y₂	2.9
Calculation factor	Y₀	1.8

Tolerances of run-out

Range of section height at inner ring of assembled bearing	t_Kia	13 µm
Maximum run-out of inner ring side face to the bore	t_Sd	13 µm
Range of section height at outer ring of assembled bearing	t_Kea	23 µm
Perpendicularity of outer ring outside surface	t_SD	7.5 µm
ISO tolerance class for geoal tolerances		P5

Radial internal clearance

Minimum initial clearance	220 µm
Maximum initial clearance	300 µm

Tolerances: Normal, P6, P5,
tapered bore 1:12, tapered bore 1:30
Radial internal clearance: cylindrical bore, tapered bore

Basic Parameters

Bearing Inner Diameter：280 mm
Bearing Outer Diameter：500 mm
Bearing Thickness：176 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.