Steel Screw Clamp GZ 300/140 mm — No name, model BY GZ30, 300 mm jaw span, 140 mm throat depth

The Steel Screw Clamp GZ 300/140 mm (model BY GZ30) is a heavy-duty clamping tool designed for secure, adjustable holding of workpieces. It provides a maximum jaw span of 300 mm and a throat depth of 140 mm, combining a threaded screw mechanism with a fixed bar to deliver controlled clamping pressure and stable alignment. The clamp is intended for use in metalworking, carpentry and general assembly tasks where reliable holding during operations such as drilling, welding and gluing is required.

Advantages

The screw mechanism enables precise and incremental adjustment of clamping force, while the robust steel construction offers durability and resistance to deformation under load. The combination of a long jaw span and moderate throat depth allows the clamp to accommodate larger workpieces without sacrificing reach. The fixed bar ensures alignment stability, reducing slippage and maintaining position during machining or adhesive curing.

Suitable for

• Holding metal and wooden parts during drilling and tapping
• Securing components for welding and soldering
• Clamping pieces during gluing and bonding operations
• Temporary fixturing in assembly and fabrication tasks

Key specifications

• Maximum jaw span: 300 mm
• Throat depth: 140 mm
• Material: steel construction for body and screw
• Clamping type: screw-operated clamp with fixed bar
• Intended applications: metalworking, carpentry, assembly

How to use

Position the clamp so the fixed bar rests against the workpiece and open the jaws to fit around the material. Turn the threaded screw clockwise to apply pressure until the workpiece is held securely; turn counterclockwise to release. Ensure even contact along the clamped surfaces and avoid overtightening to prevent deformation of softer materials. For welding or gluing, verify alignment before applying full clamping force and allow adhesive or welds to set while the clamp remains in place.

Usage recommendations

The clamp should be inspected periodically for wear, thread damage and straightness of the bar. Apply light lubrication to the screw threads to maintain smooth operation. Use protective pads on the jaws when clamping finished or delicate surfaces to avoid marking. Store the clamp in a dry environment to reduce corrosion risk.