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DUNKES DN 4

Radial 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
Riveting spindle speed approx. 1400 rpm
Tool-to-counter-tool installation height max. 80 mm
Compressed air requirement 6 bar
Motor power per riveting unit 1.1 kW
Mains connection 380 Volt, 50 Hz

- Rotary table, indexing table with servo drive, step size programmable via Siemens PLC control
- Double riveting unit is adjustable within the machine frame towards the rotary table
- Table size Ø 295 mm for mounting round workpieces
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- Pneumatic riveting stroke motion
- Riveting unit adjustment via geared motor with leadscrew, positioning via adjustable microswitch
- Modernized control and conversion to servo drive on rotary table in 2009
- New electrical switch cabinet with Siemens Simatic Panel - year 2009
- Riveting time steplessly programmable
- Riveting pressure steplessly adjustable via pressure gauge
- Micrometer stop for stroke limitation of opposing riveting units 0-60 mm
Space requirements (L x W x H) 3200 x 1250 x 2400 mm
Weight approx. 2500 kg
Good condition

The machine was used for riveting segmental saw blades from Ø 400 to Ø 2000 mm.
The segments were manually placed on the carrier disc and fixed with straight rivet pins.
The opposing riveting unit rivets the pin simultaneously from both sides.
The automated table continuously indexes to the next working position.
Ideal for saw blade manufacturers and repair shops,
or for the construction of a special-purpose machine.

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