G Clamps

About G Clamps

G clamps, also known as C clamps due to their distinctive curved frame shape, are essential workshop tools designed to secure workpieces firmly during cutting, drilling, gluing, welding, or assembly operations. Their robust all-metal construction delivers exceptional durability and substantial clamping pressure, making them indispensable across metalworking, woodworking, fabrication, and construction applications throughout the UK.

MyToolShed.co.uk stocks an extensive range of G clamps from trusted manufacturers including Draper, Sealey, Faithfull, Record, Bessey, and Stanley. Our selection encompasses compact 25mm clamps for precision work through to heavy-duty forged models exceeding 150mm capacity for larger fabrication projects. Available configurations include standard G clamps, deep throat models for extended reach, quick-release versions for faster operation, one-handed ratchet mechanisms, and specialist copper-plated clamps for welding applications.

Applications

G clamps are versatile work-holding tools used across numerous trades and industries:

• Welders and Fabricators: Securing metal components during tack welding, brazing, and fabrication work
• Joiners and Carpenters: Holding timber joints whilst glue sets, securing workpieces to benches, and furniture assembly
• Metalworkers and Engineers: Clamping components during machining, drilling, and filing operations
• Mechanics and Vehicle Technicians: Holding parts during repair work and modifications
• Builders and Site Workers: Temporary fixing of materials, securing formwork, and general construction tasks
• DIY Enthusiasts: General purpose clamping for household repairs, craft projects, and hobby work
• Shopfitters and Installers: Holding fixtures and fittings in position during installation

Choosing The Right G Clamps

Size and Capacity: Determine the maximum material thickness you'll work with and select clamps with adequate jaw opening. For versatility, consider sets with multiple sizes (typically 25mm, 50mm, 75mm, and 100mm capacities). Account for throat depth when clamping away from material edges—deep throat models provide essential reach into larger workpieces.

Construction Quality: For heavy-duty professional use, forged steel G clamps from Record, Bessey, and Faithfull offer superior strength and longevity. Cast iron models from Draper and Sealey provide excellent value for lighter workshop duties. Check for smooth screw threads and sturdy frames without imperfections.

Protective Features: When working with wood, soft metals, or finished surfaces, look for clamps with rubber or plastic protective caps to prevent marking. Alternatively, place scrap material between clamp and workpiece.

Specialist Applications: Welders should opt for copper-plated G clamps which resist spatter adhesion. Quick-release mechanisms and one-handed operation models dramatically reduce setup time when repositioning clamps frequently. MyToolShed.co.uk offers three-way G clamps for applying pressure at multiple angles on complex assemblies.

Safety Information

Inspect Before Use: Check clamps for frame cracks, damaged threads, or worn swivel pads before each use. Defective clamps can fail unexpectedly under load, potentially causing injury or damaging workpieces.

Apply Appropriate Pressure: Over-tightening can damage workpieces, strip threads, or cause clamp failure. Apply only the pressure necessary to secure work—excessive force may cause sudden release or frame fracture.

Secure Positioning: Ensure swivel pads are properly seated and centred on workpieces to prevent slipping. Position clamps where they won't interfere with cutting or drilling operations, and never place hands in line with potential release paths.

Frequently Asked Questions

What's the difference between a G clamp and a C clamp?
There is no functional difference—these are regional naming variations for the same tool. In the UK, "G clamp" is more commonly used due to the frame's resemblance to the letter G, whilst "C clamp" is preferred elsewhere.

What size G clamp do I need?
For general workshop use, a set containing 25mm, 50mm, 75mm, and 100mm capacity clamps covers most applications. Professional tradespeople working with larger materials may require 150mm+ capacities. Consider throat depth alongside jaw capacity for your specific requirements.

Can I use regular G clamps for welding?
Yes, but copper-plated G clamps are preferable for welding applications. Standard steel clamps work, but weld splatter adheres to them, building up over time and preventing proper clamping action. Copper plating prevents adhesion, making cleanup easier and extending clamp life in fabrication environments.