Rotatable earth coupling NKK 400 – 2000 (current coupling)
Very solid, rotatable current coupling for loads of 400 to 2000 A – the safest earth connection for rotating workpieces in tank, pipeline and equipment construction.
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- Load
- 400 – 2000 A
- Weight
- 1.6 – 7.6 kg
- Cable connection (NKK 400/600)
- 50 – 95 mm²
- Fastening to the workpiece
- Pole clamp, clamp head or magnet
Description
A good earth connection to the workpiece is essential for flawless manual or automatic welding. Ever-increasing demands on the quality of welded parts make it necessary to use specially developed current transmission elements; in many cases this eliminates a recurring source of faults.
For rotating workpieces, an earth connection with a current coupling is the safest and best solution. The NKK is a very solid, rotatable current transmission element designed for rough operation and for loads of 400 to 2000 A.
For fastening to the workpiece, special pole clamps (type PZ), the clamp head type K 2 and the magnetic traverse type NTF 1200 with permanent magnets are available; they are ordered separately. Combining the devices offers numerous application options for a wide range of currents.
The NKK 2000 can be regreased; a grease gun with special grease P 34 and lubrication instructions are supplied. Repairs may only be carried out by the manufacturer. For installation in machines and fixtures, versions up to 4000 A are available (type NKK … S1).
Advantages
- Cable-friendly connections
- Protection of the workpiece
- No spark formation
- Quick installation
- Robust design
Technical data
| Type | Order no. | Load [A] | Weight [kg] | A [mm] | Ø B [mm] | C [mm] | D [mm] | E [mm] | F [mm] | G [mm] | H [mm] | a [mm] | b [mm] | Ø c [mm] | Ø d [mm] | e [mm] | f [mm] | Cable connection [mm²] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NKK 2000 | 09 00 00 | 2000 | 7.6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| NKK 1200 | 08 00 00 | 1200 | 4.2 | 151 | 72 | 97 | 87 | 44 | 39 | 46 | 50 | 15 | 22 | 16.5 | 16.5 | 25 | 20 | – |
| NKK 800 | 07 00 00 | 800 | 2.7 | 137 | 62 | 78 | 75 | 44 | 39 | 40 | 40 | 15 | 17 | 16.5 | 12.5 | 20 | 20 | – |
| NKK 600 | 06 00 00 | 600 | 2.2 | 129 | 58 | 95 | 71 | 44 | 39 | – | – | 10 | – | 12.5 | – | – | 20 | 70–95 |
| NKK 400 | 05 00 00 | 400 | 1.6 | 117 | 52 | 90 | 60 | 44 | 39 | – | – | 10 | – | 12.5 | – | – | 20 | 50–70 |
NKK 2000: dimensions see dimension drawing. NKK 400/600: terminal for Cu clamping sleeve DIN 46228. Special grease P 34 is available in 0.5 kg tins (order no. 40 00 00).
