FAQ

Frequently Asked Questions (FAQs) – About Stamping Press and Buying Used Mechanical Presses

At S&G Press & Machinery, we specialize in buying and selling high-quality used mechanical presses and stamping equipment. Whether you’re a first-time buyer or an experienced manufacturer, we understand the importance of choosing the right press for your production needs. Below are answers to some of the most common questions about purchasing a used mechanical press.

1. What should I consider when buying a used mechanical press?

When purchasing a used mechanical press, key factors to evaluate include:

✅ Tonnage Capacity – Ensure the press tonnage meets your stamping and forming requirements.
✅ Bed Size & Stroke Length – The press should accommodate your tooling and production needs.
✅ Frame Type – Choose from gap frame (C-frame), straight-side, or knuckle-joint presses based on your applications.
✅ Press Condition & Maintenance History – Check for structural integrity, proper lubrication, and wear on key components.
✅ Under Power Inspection – Always verify that the press runs smoothly before purchasing.
✅ Control System & Safety Features – Modern controls (Wintriss, Link, Toledo, Cieco) enhance efficiency and safety.
✅ Availability of Spare Parts – Ensure replacement parts are accessible to minimize downtime.

At S&G Press, we provide detailed inspection reports and under-power demonstrations to help you make an informed decision.

2. How do I determine the right press tonnage for my application?

Tonnage requirements depend on factors like material thickness, type, and forming process. A basic calculation is:

Tonnage=(Perimeter×MaterialThickness×ShearStrength)/2,000Tonnage = (Perimeter \times Material Thickness \times Shear Strength) / 2,000

📌 Application-Specific Recommendations:

• Blanking & Piercing: Requires robust tonnage to handle reverse forces.
• Deep Drawing: Needs slow ram speed and full tonnage throughout the stroke (consider link motion or servo presses).
• Bending & Forming: Depends on material thickness and bend angle.

Not sure what you need? Our team at S&G Press can guide you through the selection process.

3. What is the difference between a reconditioned and a rebuilt press?

A reconditioned press undergoes minor repairs and performance improvements, while a rebuilt press is fully restored to like-new condition.

At S&G Press, we offer both reconditioned and rebuilt presses based on your budget and operational needs.

4. How do I inspect a used mechanical press before purchasing?

A thorough inspection ensures you’re making a sound investment. Here’s what to check:

✅ Frame & Bolster Plate – Look for cracks, welds, or signs of stress.
✅ Clutch & Brake System – Ensure smooth engagement and no excessive wear.
✅ Ram & Slide Movement – Should move smoothly without side-to-side play.
✅ Bearings & Bushings – Check for excessive wear or lubrication issues.
✅ Electrical & Control System – Inspect wiring, safety relays, and automation compatibility.
✅ Under Power Test – Always see the press running before buying.

At S&G Press, we provide in-depth inspections and video demonstrations of our available presses.

5. What types of used mechanical presses are available?

We offer a variety of used presses to fit different production needs:

• Gap Frame Presses (C-Frame): Compact and versatile, ideal for piercing, bending, and light forming.
• Straight-Side Presses: Designed for high-tonnage applications and progressive die stamping.
• Knuckle-Joint Presses: Best for precision forming, coining, and embossing.
• Link Motion Presses: Slows the ram near BDC for deep drawing and heavy-gauge materials.
• High-Speed Presses: Used for thin materials and electronic component manufacturing.

Not sure which press is best? Contact S&G Press for expert recommendations.

6. What safety features should a used press have?

Safety is a top priority when purchasing a used mechanical press. Key features to look for include:

✅ Light Curtains & Safety Guards – Prevents operator injury.
✅ Emergency Stop System – Immediate shutdown capability.
✅ Updated Clutch & Brake Controls – Enhances safety and operational efficiency.
✅ Load Monitoring System – Detects overloading and reverse tonnage risks.

At S&G Press, we ensure all our presses meet industry safety standards.

7. What is reverse tonnage, and how does it affect a mechanical press?

Reverse tonnage (snap-through force) occurs when a material fractures, causing an upward shock in the press.

⚠ Effects of Reverse Tonnage:

• Structural stress on the press frame
• Increased die wear and breakage
• Potential damage to the crankshaft, clutch, and bearings

🔧 How to Minimize Reverse Tonnage:
 ✔️ Increase die clearance to reduce snap-through force.
✔️ Use shock dampers to absorb excess energy.
✔️ Consider servo or link motion presses to control forming speed.

Our team at S&G Press can help you select a press built to withstand reverse tonnage.

8. How is a used mechanical press transported and installed?

Transporting and installing a used press requires careful planning:

📌 Steps for Safe Installation:

1. Hire a professional rigging company for transportation.
2. Secure all components (bearings, lubrication, electrical systems) during transit.
3. Level the press properly to avoid stress on the frame.
4. Connect electrical and pneumatic systems correctly.
5. Test the press under power before starting production.

S&G Press can assist in coordinating safe transport and installation.

9. How much does a used mechanical press cost?

Pricing depends on tonnage, brand, condition, and reconditioning level:

💰  For the latest pricing, check our inventory at S&G Press or request a quote today.

10. Where can I find quality used mechanical presses?

📍 S&G Press & Machinery is your trusted source for high-quality used stamping presses.

We offer:
✔️ A wide inventory of used Minster, Aida, Komatsu, Eagle, Bliss, Niagara, and Verson presses.
✔️ Reconditioning & rebuilding services to fit your budget.
✔️ Under power inspections & transparent reporting.
✔️ Assistance with installation and technical support.

🔹 Ready to find the right press? Browse our inventory or contact us today for expert assistance!