The BESSEY STBU is a heavy-duty U-shaped high-performance clamp delivers clamping force up to 22,000 N.

The U-shaped design allows double-sided step-over clamping. This makes the STBU especially suitable for T-profiles and double T-profiles.

A 500 mm opening provides capacity for larger workpieces. The 175 mm throat depth gives excellent reach across wide sections. A 19 mm hexagonal bolt sits at the spindle end. This allows high tightening force using suitable tools.

The heat-resistant pressure plate includes a durable sintered steel insert. It can swivel up to 35° for improved contact on angled surfaces.

⭐ Key Features

• Up to 22,000 N clamping force

• Maximum tightening torque of 80 Nm

• Double-sided step-over clamping

• Ideal for T-profiles and double T-profiles

• 500 mm opening capacity

• 175 mm throat depth

• Strong 40 x 20 mm rail

• 19 mm hexagonal bolt on spindle

• Heat-resistant pressure plate

• Sintered steel pressure plate insert

• Pressure plate swivels up to 35°

• Designed for demanding professional applications

💪 22,000 N Clamping Force

The STBU provides up to 22,000 N of clamping force. Maximum performance is reached at approximately 80 Nm tightening torque. This makes the clamp suitable for demanding fabrication and assembly work. The heavy-duty construction maintains stability under high pressure.

🔄 Double-Sided Step-Over Clamping

The U-shaped design allows the clamp to reach around raised sections. This is especially useful when working with structural profiles. It is designed for both T-profiles and double T-profiles. The shape provides clamping access where standard clamps may struggle.

🔩 19 mm Hexagonal Spindle

The spindle features a 19 mm hexagonal bolt at the end. This allows additional tightening force using suitable hand tools. It is particularly useful for heavy fabrication work. Controlled tightening helps achieve consistent clamping pressure.

🔥 Heat-Resistant Pressure Plate

The special pressure plate is designed for demanding working conditions. A sintered steel insert helps improve durability. The plate can swivel up to 35°. This allows better contact on angled or uneven workpieces.

🏗️ Heavy-Duty Construction

The STBU uses a strong 40 x 20 mm rail which provides excellent rigidity under high clamping loads. The substantial construction supports frequent professional use. making it ideal for fabrication, steelwork and industrial assembly.

📏 Specifications

• Product: BESSEY STBU
• Order Number: STBU40-17-15
• Opening: 500 mm
• Throat Depth: 175 mm
• Clamping Depth: 150 mm
• Secondary Clamping Depth: 110 mm
• Rail: 40 x 20 mm
• Maximum Clamping Force: 22,000 N
• Maximum Tightening Torque: 80 Nm
• Spindle Bolt: 19 mm hexagonal
• Pressure Plate Tilt: Up to 35°
• Weight: 7.96 kg

🛠️ Applications

• Structural steel fabrication.
• Suitable for T-profiles and double T-profiles.
• Welding and assembly work.
• Heavy metal construction.
• Suitable for industrial workshops.
• Ideal where very high clamping force is required.

✅ Why Choose the BESSEY STBU?

The BESSEY STBU combines extreme clamping force with specialised U-shaped access.

Its 22,000 N capacity suits demanding professional work.

Double-sided step-over clamping makes it ideal for structural profiles.

The heat-resistant pressure plate adds durability and flexibility.

Choose the STBU for heavy-duty clamping in fabrication and steel construction.