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DUNKES DN 4

Orbital riveting machine Double riveting automatic with rotary indexing table DUNKES type DN 4
with SIEMENS control
Machine No. P 81 - 5458 Year of construction 1982 / 2009
Rivet shank diameter max. 12 mm
Tool shank diameter 16 mm
Throat depth 190 mm
Rivet head stroke per riveting unit approx. 60 mm
Rivet spindle speed approx. 1400 rpm
Mounting height tool - counter tool max. 80 mm
Compressed air requirement 6 bar
Motor power per riveting unit 1.1 kW
Power supply 380 Volt, 50 Hz
- Rotary indexing table with servo drive, step size programmable via Siemens PLC control
- Double riveting unit adjustable in the machine frame towards rotary table
- Table diameter Ø 295 mm for accommodating round workpieces
- Pneumatic riveting stroke movement
- Riveting unit adjustment via geared motor with leadscrew, positioning via adjustable microswitch
- Control system modernized and rotary table drive converted to servo in 2009
- New electrical control cabinet with Siemens Simatic Panel - year 2009
- Riveting time infinitely programmable
- Riveting pressure continuously adjustable via pressure gauge
- Micrometer stop for stroke limitation of the opposing riveting units 0-60 mm
Space requirement L x W x H 3200 x 1250 x 2400 mm
Weight approx. 2500 kg
Good condition

The machine was used for riveting segment saw blades from Ø 400 to Ø 2000 mm.
The segments were manually placed onto the carrier disc and fixed with straight rivets.
The opposing riveting units rivet the pins simultaneously from both sides.
The controlled table automatically rotates to the next working position.
Ideal for saw blade manufacturers and repair shops.
Or for constructing a custom special-purpose machine.
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