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DUNKES DN 4

Radial Riveting Machine Double Rivet Automatic with Rotary Indexing Table DUNKES Type DN 4
Rotary table with SIEMENS control system
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
Maximum die height (tool to counter-tool): 80 mm
Compressed air requirement: 6 bar
Motor power per rivet 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 relative to the rotary table
- Table diameter Ø 295 mm for clamping round workpieces
- Pneumatic rivet stroke movement
- Rivet unit adjustable via geared motor with lead screw, positioning via adjustable microswitch
- Control system modernization and conversion to servo drive for indexing table in 2009
- New electrical control cabinet with Siemens Simatic Panel - built in 2009
- Riveting time steplessly programmable
- Riveting pressure steplessly adjustable via pressure gauge
- Micrometer stop for stroke limitation of the opposing rivet 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 mm to Ø 2000 mm.
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The segments were manually placed onto the carrier disc and fixed with straight rivets.
The opposing riveting units simultaneously press both ends of the rivet.
The controlled indexing table automatically rotates to the next working position after each cycle.
Ideal for saw blade manufacturers and repair shops.
Alternatively suitable for custom machine construction.

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