Mechanical vs. Servo Presses: Key Differences and Applications

When selecting a stamping press, two primary types dominate the industry: mechanical presses and servo presses. While both serve metal stamping and forming applications, they differ significantly in operation, precision, flexibility, and efficiency. Understanding these differences is crucial for selecting the right press based on production needs.

Mechanical Presses

How They Work

Mechanical presses operate using a flywheel, which stores and releases energy to drive a crankshaft, eccentric, or knuckle-joint mechanism. The flywheel maintains a consistent rotational speed, transmitting force through gears and a clutch system to generate a powerful stamping motion.

Key Characteristics

• High-Speed Operation – Ideal for mass production.
• Consistent Force – Delivers full tonnage at bottom dead center (BDC).
• Fixed Stroke Profile – Predefined by the mechanical linkage.
• Durability & Reliability – Built for continuous production.

Applications

• Automotive Components
• Appliance Manufacturing
• Electronics
• General Metal Stamping

Servo Presses

How They Work

Servo presses use an electric servo motor instead of a flywheel and clutch system. These motors control the press ram's movement electronically, allowing for precise control of speed, stroke length, and force application throughout the entire forming process.

Key Characteristics

• Variable Stroke & Speed – Customizable stroke profiles.
• Full Tonnage Throughout the Stroke – Provides tonnage at various stroke points.
• Energy Efficiency – Uses power only when needed.
• Greater Control & Flexibility – Reduces scrap rates and improves material flow.

Applications

• High-Strength Steel & Aluminum Stamping
• Precision Forming
• Electronic Components
• Progressive & Transfer Die Stamping

Comparison Table

Feature	Mechanical Press	Servo Press
Power Source	Flywheel & clutch	Electric servo motor
Speed	High SPM, fixed stroke speed	Adjustable speed & motion profiles
Precision	Limited by fixed stroke	High precision & variable control
Energy Efficiency	Runs continuously	Uses power only when needed
Material Flexibility	Best for standard metals	Ideal for high-strength steel, aluminum
Applications	High-volume production	Complex forming & precision stamping

Conclusion

Mechanical presses are best for high-speed, high-volume production, offering reliability and efficiency. Servo presses, on the other hand, provide superior flexibility, precision, and material control, making them ideal for complex and high-strength applications.

Contact S&G Press & Machinery Sales

📍 Office: 13297 West Star, Shelby Twp, MI 48315

📍 Warehouse: 30930 Industrial Rd, Livonia, MI 48150

📞 Phone: 586-563-5000

📧 Email: contactus@presses.com

🌐 Website: https://presses.com