Bessey STB40M Deep-Reach Screw Clamp 400mm Clamping Capacity 175mm Throat Depth

In a busy cabinet-making workshop, a craftsman reaches for the Bessey STB40M to secure a deep panel assembly. The clamp’s 175 mm throat depth slides over the workpiece edge, while the 400 mm opening accommodates wide glue-ups. The wooden handle turns smoothly, and the swiveling pressure plate with protective cap grips without marring the surface. This is the go-to tool when standard clamps fall short.

Key specifications

• Clamping capacity: 400 mm
• Throat depth: 175 mm
• Rail dimensions (W x T): 25 x 12 mm
• Max. clamping force: 5000 N (500 kg)
• Spindle diameter: 16 mm
• Rail material: high-quality profiled steel
• Jaw material: robust cast iron
• Handle: ergonomic wooden handle
• Pressure plate: swiveling, with protective cap
• Screw type: trapezoidal thread spindle
• Surface finish: galvanized spindle, powder-coated jaws

Why choose it

The Bessey STB40M combines deep reach with high clamping force. Its profiled steel rail resists bending under load, and the cast iron jaws provide a solid grip. The trapezoidal thread spindle delivers smooth, powerful tightening, while the protective cap prevents damage to delicate surfaces. This clamp is built for demanding woodworking and metalworking tasks where precision and reliability matter.

Ideal use cases

• Deep-reach clamping in furniture and cabinet construction
• Gluing wide panels and edge banding
• Metal fabrication and welding setups
• Holding workpieces for routing, sanding, or assembly

Good to know

The fixed jaw features integrated anti-slip protection, ensuring the clamp stays in place during tightening. The Bessey STB series is known for its durability and consistent performance in professional workshops.