240/600 BC-Spherical roller bearing-Dalian AKMI Bearing

240/600 BC Spherical roller bearing

Spherical roller bearing for wind turbine main shafts are optimized to handle the varying direction and high thrust loads of wind energy applications, allowing to perform more reliably under typical operating conditions. A modified inner geometry with super-finished functional surfaces makes this possible. Using a one-piece roller-guided cast-iron cage and an enlarged lubrication groove increases robustness.

Improved performance under wind operating conditions
Accommodate misalignment
Up to twice the fatigue life
Increased robustness for both radial and axial load conditions
Improved lubrication

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Bore type

Cylindrical

Dimensions

d	600 mm	Bore diameter
t_Δdmp	-0.05 – 0.0 mm	Deviation limits of mid-range bore diameter
D	870 mm	Outside diameter
t_ΔDmp	-0.1 – 0.0 mm	Deviation limits of mid-range outside diameter
B	272 mm	Width
t_ΔBs	-0.5 – 0.0 mm	Deviation limits of ring width
d₂	≈ 682 mm	Shoulder diameter of inner ring
D₁	≈ 784 mm	Shoulder/recess diameter of outer ring
b	46.1 mm	Width of lubrication groove
K	15 mm	Diameter of lubrication hole
r_1,2	min. 6 mm	Chamfer dimension
	Normal	ISO tolerance class for dimensions

Abutment dimensions

d_a	min. 623 mm	Diameter of shaft abutment
D_a	max. 847 mm	Diameter of housing abutment
r_a	max. 5 mm	Radius of fillet

Calculation data

AKMI performance class		AKMI Explorer
Basic dynamic load rating	C	8 502 kN
Basic static load rating	C₀	16 300 kN
Fatigue load limit	P_u	1 100 kN
Reference speed		20 r/min
Limiting speed		45 r/min
Limiting value	e	0.3
Calculation factor	Y₁	2.3
Calculation factor	Y₂	3.4
Calculation factor	Y₀	2.2

Tolerances of run-out

Range of section height at inner ring of assembled bearing	t_Kia	70 µm
Range of section height at outer ring of assembled bearing	t_Kea	140 µm
ISO tolerance class for geoal tolerances		Normal

Radial internal clearance

Minimum initial clearance	310 µm
Maximum initial clearance	480 µm

Tolerances and clearances

General bearing specifications

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

Bearing interfaces

Seat tolerances for standard conditions
Tolerances and resultant fit

Spherical roller bearing

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