SPECIFICATION FOR HIGH-SPEED AIR SPINDLE
Rotation speed – 2K ~ 75K [rpm
]
Air supply
Pressure :5~7 [bar]
Flow rate :45-55 [lpm]
Filtering :0.01 [µm]
Dew point :lower then 15 [
C]
Oil residue :lower then 0.1 [ppm]
PCW (Pure Clean Water – pure H
2
O)
Coolant Water
Pressure (max) : 5 [bar] (72.5 psi)
Flow rate (min) :1-3.5 [lpm]
Temperature :20 ~ 25 [oC]
Variation range :within 1 [oC]
Static run-out of the rotor
Radial direct.(max) :0.35 [µm]
Thrust direct (max) :0.35 [µm]
Dynamic run-out of the rotor
Radial direct(max) :1 [µm]
Thrust direct.(max) :1 [µm]
Radial direct. Fluctuation between peaks :0.3 [µm]
Thrust direct. Fluctuation between peaks :0.3 [µm]
Rigidity of the rotor
Radial direct. :14 [N/µm]
Thrust direct. :9 [N/µm]
Load capacity
Radial direct. :60 [N]
Thrust direct. :100 [N]
General
Shaft Axial Extension @ Tm = 40 [oC] :4 [µm]
Spindle Weight :6.7 [Kg]
Rotor Inertia :6.5E-5 [Kg*m2]
Noise level 0 up to 10 Krpm (max) :70 [db a]
Resistance between shaft & frame :1 [MΩ]
Balance:G0.4 @ ISO 1940 :0.03 [gmm]
CE standard : corresponding
Floating Point : 2 [bar]
Cables` length: Power cable :1.25 [m]
Signal cable : 1.3 [m]
Brushes cable : 1.15 [m]
Brushes life-time@ 30-40 Krpm : 2500 [hr]
Mechanical Coefficient
Air Flow Coefficient :A
f
= 38.14
Water Flow Coefficient :W
f
= 2.84
Still Air Cooling Efficiently :C
s
= 28.8
Air Flow Cooling Efficiently :C
a
= 54
Shaft Extension Coefficient :E
S
= 0.055
Mechanical Friction Coefficient :F
L
= 0.043
Stiffness & Load Coefficient :S
L
= 0.417
Thermal Behavior Coefficient :B
t
= 3.6
-4
Radial Stiffness Coefficient :S
r
= 16.487
Axial Stiffness Coefficient :S
a
= 10.06
Radial Load Coefficient :L
r
= 71.54
Axial Load Coefficient :L
a
= 91.84
9
