High-Temp Magnetic Spring Ground Clamp

Set up a reliable welding ground quickly on flat, curved, or uneven metal surfaces.
SHT-GMS300 High-Temp Magnetic Spring Ground Clamp gives welders a fast, convenient way to establish a ground connection without using a traditional clamp. Place the magnetic base on a compatible metal surface, connect your ground lead, and position the spring-loaded copper contact against the workpiece.

The powerful magnet provides up to 60 lb (30 kg) of holding force, while the spring-loaded copper conductive contact helps maintain consistent contact on flat, curved, rough, or irregular work surfaces.

Why Choose the SHT-GMS300?

• Fast Ground Setup: Magnetic design makes it quick to position and reposition your welding ground.
• 60 lb Magnetic Hold: Strong magnetic base provides up to 60 lb (30 kg) of holding force.
• High-Temperature Magnet: Rated for temperatures up to 572°F (300°C) for short-term exposure.
• Long-Term Heat Resistance: Rated for temperatures up to 356°F (180°C) for extended use.
• Spring-Loaded Copper Contact: Helps maintain tight, consistent electrical contact with the workpiece.
• Works on Uneven Surfaces: Spring-loaded design helps the copper contact adapt to rough or irregular workpieces.
• Flat or Curved Surfaces: Magnetic base can be positioned on a variety of compatible metal surfaces.
• Easy to Reposition: Use the integrated handle to move the ground point as the job changes.

Fast, Anywhere Grounding

Instead of finding an edge or other suitable location for a traditional ground clamp, the SHT-GMS300 lets you establish a ground point directly on a compatible metal workpiece.

Place the magnetic base where you need it, connect your welding ground lead, and make sure the spring-loaded copper contact is firmly seated against clean metal. This makes it especially useful when working on large parts, welding tables, pipe, tubing, frames, and other workpieces where a standard clamp may be inconvenient.

Reliable Contact on Uneven Surfaces

The SHT-GMS300 uses a spring-loaded copper conductive contact designed to stay firmly against the workpiece. The spring allows the contact to adjust to surface variations, helping maintain a consistent electrical connection on rough or irregular metal surfaces.

For best grounding performance, always position the conductive contact against a clean, bare metal surface free from paint, rust, scale, oil, or other materials that may interfere with electrical conductivity.

Built for High-Heat Welding Environments

The high-temperature-resistant magnetic assembly is designed to provide dependable holding performance around demanding welding and fabrication environments.

Common Applications

• Welding tables
• Pipe and tubing
• Structural steel
• Metal frames
• Fabricated assemblies
• Large workpieces
• Curved metal surfaces
• Uneven or irregular workpieces
• Shop welding
• Field fabrication and repair

How to Use

1. Choose a suitable location on the metal workpiece for your ground connection.
2. Clean the contact area to expose bare conductive metal.
3. Position the magnetic base securely on the workpiece.
4. Make sure the spring-loaded copper contact is firmly seated against the workpiece.
5. Connect the welding ground lead securely to the GMS300.
6. Confirm the ground connection is stable before welding.

Frequently Asked Questions

What is the SHT-GMS300 used for?
The SHT-GMS300 provides a convenient magnetic ground connection for welding. It allows the ground point to be positioned directly on a compatible metal workpiece instead of relying on a traditional clamp location.

How strong is the magnet?
The SHT-GMS300 provides up to 60 lb (30 kg) of magnetic holding force.

Can it be used on curved metal?
Yes. Strong Hand Tools identifies the SHT-GMS300 for use on both flat and curved metal surfaces.

Can it work on uneven surfaces?
Yes. The spring-loaded copper conductive contact is designed to adjust to uneven or irregular workpiece surfaces while maintaining contact.

How much heat can the magnet handle?
The magnet is rated for up to 572°F (300°C) for short-term exposure and 356°F (180°C) for long-term exposure.

Does the welding surface need to be clean?
Yes. For a reliable electrical connection, the conductive contact should be placed against clean, bare metal. Paint, heavy rust, scale, oil, and other surface contaminants can interfere with the ground connection.

How much does the SHT-GMS300 weigh?
The SHT-GMS300 weighs approximately 0.88 lb.