0700004002 - ESAB NKK-1200 Rotary Earth Clamp 1200A

Stop Twisting Your Cables with the NKK-1200

If you work with rotary positioners or turning rolls, you know the headache of managing ground cables. As the pipe or tank spins, your ground lead wraps around the fixture, gets tight, and eventually snaps or pulls off, ruining the arc in the middle of a pass. The ESAB NKK-1200 Rotating Coupling is the heavy-duty solution to this common shop problem. It acts as a swivel for your welding current, allowing your workpiece to spin 360 degrees, indefinitely, without your cables ever getting tangled.

This isn't a lightweight clamp; it is a serious piece of hardware rated for 1200 Amps. That means you can run it with your biggest power sources, pushing heavy wire or sub-arc without overheating the connection. A solid ground is the foundation of a good weld. If your rotary ground is worn out or undersized, you get resistance buildup, the coupling gets hot, and your voltage at the arc drops, leading to porosity or lack of fusion. The NKK-1200 is built to maintain a cool, consistent connection so you can focus on the puddle, not the hardware.

Key Operational Benefits:

• Continuous Welding: Weld the entire circumference of a large vessel without stopping to reset cables.
• Cable Protection: Saves you money by preventing your expensive copper welding cables from being twisted to the breaking point.
• Stable Arc: Provides the steady current flow needed for x-ray quality welds in automated applications.

Installation is straightforward for most jig and fixture setups. The unit is designed to be bolted directly to the axis of rotation on your positioner or tailstock. Once installed, it requires minimal maintenance—just keep it greased and clean to ensure the internal contact surfaces stay conductive. For shops serious about automation and efficiency, upgrading to a high-capacity rotary ground like the NKK-1200 is a no-brainer. It keeps the arc on and the production line moving.