Aerostatic Full-Range CNC Tool Spindle with HSK-E40 Tool Interface

Rough machining with a 10 mm cutter in steel and wear-free, ultra-precise and stable high-speed machining at 60.000 rpm would save the machine user an aditional machine for the creation of precision molds and would guarantee optical surface finish at the same time. With our tool spindle model UASD-H40 Levicron have achieved this goal and can now provide a unique true full-range aerostatic CNC tool spindle with HSK-E40 tool clamping and speeds of up to 60.000 rpm.

The patented high-pressure aerostatic bearing system generates a radial and axial load capacity at the tool of up to 7.000 N / 1.400 lbs, but on the other hand also the energy saving, the speed and the ultra-precision operation of our ASD-H25/A with HSK-E25 tool interface. Compared to hydrostatic tool spindles our UASD-H40 offers not only comparable load capacities at 50% less energy costs, remarkably cost savings for peripherals and 50% more spindle speed, but because of the much more simple sealing technology also a very compact and easy to maintain spindle design.

It was designed into a standard size steel housing with 120 mm in diameters, and together with the new in-house developped spring-less automatic HSK-E40 tool interface and the high-pressure shaft rotary feedthrough capable of leading any gas or fluid at -1 to 80 bar pressure to the tool tip our UASD-H40 represents the first true full-range aerostatic CNC tool spindle with HSK-E40 tool interface and speeds of up to 60.000 rpm.


Spindle diameter:


Automatic tool interface:

Ult. static radial load capacity at spindle nose:

Radial static stiffness at spindle nose, concentric shaft:

Ult. axial load capacity:

Axial static stiffness:


Motor torque:

Shaft power:

Rotary encoder:

Medium rotary feedthrough:

Total length:


120 mm

0 – 60.000 rpm

HSK-E40, spring-less

> 3.000 N

> 120 N/µm *)

> 5.000 N

> 200 N/µm *)

Permanentmagnet-DC, 2-Poles, 3 Phases

4 Nm, S1/100%

11 kW, S1/100%

1VSS SinCos, 88 lines, zero-flag

Aerostatisch, for: Vacuum, any gas or liquid at up to 60 bar

500 mm

32 kg

*) – including bearing and material stiffness

General Body Diameter [mm] 120
Length [mm] 500
Weight [kg] 32
Max. cont. Speed [kUpm] 60
Tool Clamping Tool Interface [-] HSK-E40, spring-less
Operation [-] pneumatic
Clamping / Eject Pressure [bar] 8
Motor Type [-] 3 Phases, synchronous
Max. Torque, S1 [Nm] 4,0
Poles [-] 2
Max. Phase Voltage, S1 [V] 360
Max. Phase Current, S1 [A] 41
Peak Current [A] 60
Max. Shaft Power, S1 [kVA] 11
Rotary Encoder Type [-] incremental
Lines [-] 88
Signal A/B [-] SinCos, 1 VSS
Zero Flag [-] yes (an./dig.)
Bearing System Supply Pressure [bar] 40 - 60 (ECO: 10)
Purity Class, ISO [-] 2
Radial Static Stiffness at Spindle Nose [N/µm] > 120 *)
Radial Static Load Capacity at Spindle Nose [N] > 3.000
Axial Stiffness [N/µm] > 200 *)
Axial Load Capacity [N] > 5.000
Air Consumption [Nl/min] < 230
Shaft Feedthrough Medium [-] Vacuum, Air, Fluids
Medium Pressure [bar] < 80
Stability and Precision Taper Static Run-Out [nm] < 50
Error-Motion [nm] < 40
Dyn. Run-Out at Tool [µm] < 1 **)
Soak Time [Min] < 5
Axial Shaft Growth [µm] < 5

*) including bearing and material stiffness

**) if used with Levicrons tool holder series UTS-x

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  • Download Installation Drawing

Download the installation drawing for our UASD-H40