Rotatable welding current coupling NKK … S1 for machines and fixtures
Welding current couplings for axial connection to rotating shafts or machine components, for loads of 400 to 4000 A; easy installation and robust design for permanent, secure current transmission.
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- Load
- 400 – 4000 A
- Fastening
- Axial
- Rotation speed under load
- max. 5 rpm
- Weight
- 2.0 – 20.4 kg
Description
Rotatable welding current transmission devices for machines and fixtures. Easy installation and a robust design ensure a permanent and extremely secure transmission of the welding current.
NKK 400 S1 to NKK 2000 S1 are fastened with a set screw DIN 913, which is screwed in axially between the current coupling and the rotating machine part. The housing must be secured against rotation by stops on the right and left with approx. 2 mm clearance to the terminal lug. Flexible cables or braided copper strips are recommended for the connection.
The versions NKK 3002 S1 (3000 A) and NKK 4002 S1 (4000 A) are designed for axial screw fastening to the face of a shaft; the hexagon socket screw is accessible after removing the rear plug. The torque stop must have approx. 2 mm clearance to the torque pin on the housing; the housing must never be rigidly bolted.
Depending on the application, the rotation speed under current load should not exceed 5 rpm. The devices have lubricating nipples and must be relubricated as specified in the operating instructions, using only special grease P 34. A grease gun with special grease P 34, a nameplate with relubrication instructions and fitting and operating instructions are supplied. Repairs may only be carried out by the manufacturer.
The use of the electronically controlled grease cup ET 140 is recommended: depending on the setting, it ensures the grease supply for up to one year.
Advantages
- Easy installation
- Robust design for permanent, extremely secure current transmission
- Loads from 400 to 4000 A
- Relubricable; automatic lubrication possible with grease cup ET 140
Technical data
NKK 400 S1 – NKK 2000 S1
| Type | Order no. | Load [A] | A [mm] | Ø B [mm] | C [mm] | D [mm] | E [mm] | Ø F [mm] | G [mm] | H [mm] | J [mm] | Ø a (thread) | b [mm] | Ø c [mm] | e [mm] | f [mm] | Weight [kg] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NKK 2000 S1 | 14 00 00 | 2000 | 144 | 80 | 100 | 104 | 30 | 65 | 70 | 55 | 35 | M 20 | 20 | 16.5 | 25 | 55 | 7.2 |
| NKK 1200 S1 | 13 00 00 | 1200 | 127 | 72 | 97 | 87 | 30 | 55 | 46 | 50 | – | M 16 | 22 | 16.5 | 25 | 46 | 4.5 |
| NKK 800 S1 | 12 00 00 | 800 | 115 | 62 | 78 | 75 | 30 | 50 | 40 | 40 | – | M 16 | 17 | 16.5 | 20 | 42 | 2.9 |
| NKK 600 S1 | 11 00 00 | 600 | 109 | 58 | 68 | 71 | 30 | 45 | 40 | 40 | – | M 16 | 17 | 12.5 | 20 | 36 | 2.5 |
| NKK 400 S1 | 10 00 00 | 400 | 98 | 52 | 70 | 60 | 30 | 45 | 40 | 40 | – | M 16 | 17 | 12.5 | 20 | 36 | 2.0 |
Dimension J (second connection hole) only for NKK 2000 S1; see dimension drawing. Special grease P 34 is available in 0.5 kg tins (order no. 40 00 00).
NKK 3002 S1 and NKK 4002 S1
| Type | Order no. | Load [A] | Connections | Weight [kg] |
|---|---|---|---|---|
| NKK 3002 S1 | 37 00 03 | 3000 | 2 x 4 | 17.4 |
| NKK 4002 S1 | 38 00 03 | 4000 | 2 x 5 | 20.4 |
Accessory: grease cup ET 140
| Feature | Value |
|---|---|
| Order no. (filled with grease) | 41 00 00 |
| Height | 100 mm |
| Diameter | 80 mm |
| Capacity | approx. 100 cm³ |
| Connecting thread | R 1/4" |
| Adjustable intervals | 1, 2, 3, 6, 12 months |
| Pressure generation | 0.2 – 3 bar |
| Drive | 2 x 1.5 V (long-life battery, mains-independent) |
| Function check | Signal light, 20 s interval |
| Temperature range | –10 °C – +50 °C |
| Weight | 400 g |
| Grease filling | P 34 |
