Bessey SQ-4 F-style Welding Clamp 1330 Lb Heavy Duty

Product Description

The BESSEY SQ-4 is an F-style welding clamp designed for heavy-duty fabrication and metalworking applications. It features a forged sliding arm machined from tempered steel, delivering long service life under repeated clamping loads. The high-carbon Acme threaded screw is spatter resistant and tempered for greater load capacity. With a rated clamping force of 1330 pounds and a jaw opening of 6 inches with a throat depth of 4.75 inches, this clamp is built for professional welders and fabricators who need consistent, reliable holding force on steel weldments.

This clamp is suited for tack welding, fixture building, and general steel fabrication in both shop and field environments. The heavy-duty pad protects workpiece surfaces while maintaining secure grip during MIG, TIG, or stick welding operations. It is a practical choice for ironworkers, pipe fitters, and professional welders who require a dependable F-style clamp that withstands weld spatter and high-cycle use.

Key Features

• Forged sliding arm made from tempered steel for extended service life
• High-carbon Acme threaded screw is spatter resistant and tempered for higher load capacity
• 1330 lb clamping force rated for heavy-duty holding applications
• 6-inch jaw opening accommodates a wide range of workpiece thicknesses
• 4.75-inch throat depth provides clearance for typical fabrication setups
• Heavy-duty pad protects workpiece surfaces during clamping

Compatibility

Designed as a standard F-style welding clamp suitable for general steel fabrication, fixture work, and weldment assembly applications.

Installation Notes

Position the clamp on the workpiece before initiating any weld to avoid contact with live electrical current from welding equipment. Keep the threaded screw and sliding arm clear of direct spatter where possible to preserve thread engagement over time. Inspect the sliding arm and screw threads periodically for wear or spatter buildup and clean as needed to maintain full clamping force. No special tools are required for operation, but appropriate PPE including welding gloves should be worn when handling clamps near active weld zones.

Technical Specifications

• Clamping Force: 1330 lb
• Jaw Opening: 6 inches
• Throat Depth: 4.75 inches
• Screw Type: High-carbon Acme thread, spatter resistant
• Sliding Arm: Forged tempered steel
• Weight: 2.5 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 10

Standard Information

• Brand: BESSEY
• Manufacturer Part Number: SQ-4