5 Installation and commissioning
100
HSD S.p.A. © - h0104k01a.fm120718
5.5.3 Pneumatic cylinder
The electrospindle has a single-acting cylinder.
5.5.4 Internal pressurisation
The internal pneumatic pressurisation circuit prevents the entry of harmful particles inside the
electrospindle.
The injected air exits through the gaps in the front labyrinth at the nose area of the spindle.
The pressurisation air must be present even when the electrospindle is idle and the
machine is switched on, to prevent the penetration of dust from other working areas.
With the spindle idle, check there is a uniform flow of air around the spindle shaft (pressurisation).
If this is not the case, check the efficiency of the pneumatic circuit and check the connections.
Action Piston area
Internal volume of the
cylinder
Tool release
(piston forward)
140cm
2
- 21.7 sq.in 141cm
3
- 8.6 cu.in
Piston return
(piston backward)
Spring return
Consumption
Compressed air at 4 bar, 20°C (58 PSI, 68°F) Equivalent volume at 1 Atm, 20°C (68°F)
10÷15 litres/minute - 0.35÷0.53 cfm 40÷60 litres/minute - 1.4÷2.1 cfm
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