PRODUCTS

FAG INA Schaeffler

INA

VSA250755-N-ZT

Slewing ring, four Point contact bearings, external gear VSA250755-N-ZT

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Main Dimensions & Performance Data

d_i	655 mm	Bore Diameter
d_iZT	657 mm	Diameter centring inner ring
	IT8	Diameter centring inner ring tolerance
H	80 mm	Height
D_a	898 mm	Outside Diameter
D_{i ZT}	755 mm	Diameter centring outer ring
	IT8	Diameter centring outer ring tolerance
T	19 mm	Length centering outer ring
t	15 mm	Length centering inner ring
h_a	71 mm	Width outer ring
h_i	54 mm	height of inner ring
	0.03 mm	Normal radial clearance min.
	0.13 mm	Normal radial clearance max.
	0.05 mm	Normal axial clearance min.
	0.24 mm	Normal axial clearance max.
≈m	130 kg	Weight

Dimensions

D_i	753 mm	Inner diameter outer ring
d_a	757 mm	Outside diameter inner ring
n_i	24	Number of fixing holes in inner ring
L_i	695 mm	Pitchcircle diameter fixing holes inner ring
d_B	22 mm	Fixing bore
n_a	24	Number of fixing holes in outer ring
L_a	816 mm	Pitchcircle diameter fixing holes outer ring
d_Ba	M20	Tread fixing bore
G_l	40 mm	Thread depth fixing hole
F_{r zul}	375,000 N	Max. radial load fixing screws (friction locking)
d₀	882 mm	Pitch circle diameter gearing
m	9 mm	Modul of gearing
z	98	Number of teeth
F_{z norm}	55,100 N	Max. tooth force root fatigue strenght (at a shock factor of 1,2)
F_{z max}	80,200 N	Max. tooth force against tooth fracture (at a shock factor of 1,35)

Temperature range

T_min	-25 °C	Operating temperature min.
T_max	80 °C	Operating temperature max.

Calculation factors

C_a	395,000 N	Basic dynamic load rating, axial
C_0a	2,700,000 N	Basic static load rating, axial
C_r	360,000 N	Basic dynamic load rating, radial
C_0r	1,230,000 N	Basic static load rating, radial

Your current product variant

Centering	ZT	Centering on inner and outer ring
Gearing	N	Normalized gear teeth on bearing ring

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