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Frequently Asked Questions

For a better customer service herebelow we list some questions and relevant answers from our technical department.

The examined products are:

Only the TAR 270 is available in both versions. The TAR 160 is only clockwise version.
Anyhow the rotation direction cannot be changed during work.
Yes, the central shaft cannot be overloaded.
No, the maximum foreseen diameter is mm 990.
100 kg on a 270 mm plate. On bigger diameters permissible loads decrease exponentially.
No, once the rotation angle is established it cannot be changed during work.
In one station there is no error if the table itself is used as index for top plate machining. On different stations the accuracy is:
TAR 270 ± mm 0,05 on a 270 mm plate,
TAR 160 ± mm 0,1 on a 160 mm plate.
The accuracy decreases proportionally with diameter increase.
No, it is only possible on the TAR 270, asking for this model in the ordering form.
For TAR 270 maximum 40 parts.
For TAR 160 maximum 20 parts.
10 working days for a standard unit.
From mm.10 to mm. 400, according to feeder model.
From mm 0,3 to mm 2,5 according to the different models.
Yes, you can freely program different strokes for one piece.
From mm. 1 to mm. 10000.
Approx. 25 working days.
From 1,5 to 20 kN , according to the model.
According to the model 70 mm or 100 mm.
Yes, for the complete length.
Yes, the client shall take care of the control valves and of the CE declaration.
Yes, it is delivered with CE declaration, type B, Annex 2, according to Machine Directive 98/37 CE.
Yes, according to Annex IV of Machine Directive 98/37 CE.
Yes, a chromium plated steel rod is included inside the power cylinder.
Yes, an optional control system is available with such control. The operator can leave his hands from the two-hand control when the tool is closed.
Yes, on all the models.
All the available powers for our pneumatic and hydropneumatic presses.
Standard top plates up to 600 mm. For bigger diameters the layout is studied according to client’s requirements.
They are to be defined according to the job of the press and to the load on the rotary table.
Yes, for the front side a pivoting shield is installed as a standard.
Yes, according to the European Safety Standards.
Yes, if required by the client.
From 32 to 125 mm.
On request we can deliver rotations up to 720°.
Male = the pignon has a protruding shaft with key.
Female = the pignon has a hole shaft with inner key.
From mm.10 to mm. 1000.
From mm. 1 to mm. 1000.
About 12 m/1’, with a maximum frequency of 180 cycles /1’.
See performances diagram.
From mm 0,1 to mm 5, according to the different models.
Yes, the feeder is delivered complete with CE certificate, according to Annex II ref. B of “Machine Directive” 98/37 CE.
Yes, the air supply is discharged from the cylinder, whilst the fixed jaws is kept under pressure to avoid material slipping.
Yes, you have to adapt the height of the passage by adequate distancers.
Without pilots in the tool of the press accuracy is within ± mm 0,05, with pilots in the tool of course there is no error.
10 to 25 working days according to different models.
From 0 to 500 kg.
From 30 to 300 mm.
16 rpm, that is to say 20 m/1’.
Yes it is, the braking torque is adjustable.
Yes, as an option.
From 20 to 320 kN, according to the different models.
Yes, the client shall take care of the control valves and of the CE declaration.
Yes, in the standard model a mechanical stopper is foreseen, limiting the pneumatic low pressure working stroke cylinder.
Yes, according to Annex IV of Machine Directive 98/37 CE.
Yes, an optional control system is available with such control. The operator can leave his hands from the two-hand control when the tool is closed.
Yes, on 20, 40 and 70 kN models.
For a correct selection the press power is not enough. We suggest to refer to the clutch specifications or to the original valve on the press.
Yes, they take advantage of an inherent monitoring system.
G.P.A. manufactures its electrovalves in 5 models:
Nominal size 10
Nominal size 15
Nominal size 20
Nominal size 30
Nominal size 40
Yes, G.P.A. electrovalves are approved by the German Institute BG, which takes care of safety of metal sheet working machines. They are certified according to the European Harmonized Standard EN692, which deals with safety of mechanical presses.
Yes. With each electrovalve we deliver an instruction booklet in six languages, including copy of the BG approval and serial number of the valve.


G.P.A. ITALIANA s.r.l.
Sede legale - Via L. Da Vinci, 25 - 22074 LOMAZZO (CO) ITALY - C.F. e P.Iva 00226440139 - Cap. Sociale: € 520.000 int. vers. Reg. Imprese di Como n°. 00226440139 - REA n°. 129635
Tel. +39 02 96779406 - Fax +39 02 96370473 - E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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