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DUNKES DN 4

Orbital Riveting Machine Double Riveting Automatic with Rotary Indexing Table DUNKES Type DN 4
Rotary Table with SIEMENS Control
Machine No. P 81 – 5458 Year of manufacture: 1982 / 2009
Maximum rivet shank diameter: 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
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Maximum installation height (tool to counter-tool): 80 mm
Compressed air requirement: 6 bar
Motor output per riveting unit: 1.1 kW
Electrical connection: 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 relative to the rotary table
- Table size: Ø 295 mm for mounting round workpieces
- Pneumatic riveting stroke movement
- Riveting unit adjustment via geared motor with leadscrew, positioning via adjustable microswitch
- Modernized control and conversion to servo drive on the rotary table in 2009
- New electrical control cabinet with Siemens Simatic Panel – built 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.
Segments were manually positioned onto the carrier disc and fixed with straight rivet pins.
The opposing riveting unit simultaneously rivets the pin from both sides.
The controlled table automatically indexes to the next working position.
Ideal for saw blade manufacturers and repair shops.
Also suitable as a basis for building a special-purpose machine.

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