DEFIPRO MHP-20 Electric Hydraulic Hole Puncher User Manual

1. Important Safety Information

Read all safety warnings, instructions, illustrations, and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury.

• Always wear appropriate personal protective equipment, including safety glasses, gloves, and hearing protection.
• Ensure the work area is clean, well-lit, and free from obstructions.
• Do not operate the tool in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
• Keep children and bystanders away while operating a power tool.
• Avoid accidental starting. Ensure the switch is in the off-position before connecting to power, picking up, or carrying the tool.
• Do not overreach. Keep proper footing and balance at all times.
• Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools.
• Use the correct tool for your application. Do not force the tool to do a job for which it was not designed.

2. Product Overview

The DEFIPRO MHP-20 is a 1400W electric hydraulic hole puncher designed for precise and efficient punching of various metal materials. It features a powerful 4-plunger cylinder pure copper motor, delivering 22 tons of punch force for quick and clean holes.

2.1 Package Contents

Upon unpacking, verify that all items listed below are present and in good condition:

• 1 x 1400W Electric Hydraulic Hole Punch Machine
• 5 x Punching Dies (Φ6.5mm, Φ9mm, Φ13mm, Φ17mm, Φ20.5mm)
• 1 x Hydraulic Oil Can
• 1 x Portable Case
• 2 x Carbon Brushes
• 1 x Wrench
• 1 x Fixed Base
• 4 x Hexagonal Wrenches
• 1 x Silicone Ring Pad
• 1 x User Manual

Figure 2.1: Included accessories with the DEFIPRO MHP-20 Electric Hydraulic Hole Puncher.

2.2 Key Features

• Powerful Motor: 1400W pure copper motor for fast and efficient punching.
• High Punch Force: 22 tons of hydraulic force for penetrating hard materials.
• Fast Punching Speed: Achieves a punch in 2-3 seconds.
• Versatile Material Compatibility: Suitable for steel, iron, aluminum, and copper plates (3-8mm thickness), and angle iron (#4-#8).
• Two Operation Modes: Can be used with a fixed base for platform work or with an auxiliary handle for portable, off-platform use.
• Precise Drilling: Designed to create smooth, burr-free holes.

Figure 2.2: Main components of the DEFIPRO MHP-20 Electric Hydraulic Hole Puncher.

3. Specifications

Figure 3.1: Product dimensions and key specifications.

4. Setup

4.1 Installing the Fixed Base

1. Place the fixed base onto a stable, flat platform or workbench.
2. Secure the fixed base using appropriate fasteners (not included) to prevent movement during operation.
3. Mount the hydraulic hole puncher onto the fixed base. Ensure it is seated correctly and all securing bolts are tightened.

4.2 Attaching the Auxiliary Handle (for portable use)

For operations requiring portability or punching at different angles, attach the auxiliary handle:

1. Locate the attachment point for the auxiliary handle on the side of the puncher.
2. Insert the auxiliary handle and secure it firmly.

Figure 4.1: Two working modes of the hydraulic hole puncher.

4.3 Changing Punching Dies

The puncher comes with 5 different sized dies. To change a die:

1. Ensure the machine is disconnected from the power source.
2. Use the provided wrench to loosen the retaining mechanism for the current die.
3. Carefully remove the existing die.
4. Insert the desired new die, ensuring it is correctly aligned.
5. Tighten the retaining mechanism securely with the wrench.

Video 4.1: This video demonstrates the process of disassembling and reassembling the DEFIPRO MHP-20 hydraulic hole puncher, which is useful for maintenance and die changes.

5. Operating Instructions

5.1 Preparing for Punching

1. Select the appropriate punching die for your material and desired hole size.
2. Ensure the material to be punched (e.g., steel, aluminum, copper plate, angle iron) is within the specified thickness range (3-8mm).
3. Position the material accurately under the puncher. The tool is designed for accurate positioning without offset.

Figure 5.1: High-strength switch and accurate positioning feature.

5.2 Punching Process

1. Connect the puncher to a suitable power source.
2. Firmly hold the puncher (either by the main body or the auxiliary handle, depending on the mode).
3. Press and hold the durable hand switch key to activate the hydraulic punching mechanism.
4. The puncher will rapidly create a hole in 2-3 seconds.
5. Release the switch key once the punch is complete. The die will retract.

Figure 5.2: Punching capability on various metal types and thicknesses.

Figure 5.3: Examples of punched metal materials.

Video 5.1: This video showcases the DEFIPRO MHP-20 electric hydraulic hole puncher in action, demonstrating its power and efficiency when punching holes in metal, including angle iron.

Video 5.2: This video provides instructions on how to ensure the DEFIPRO MHP-20 hydraulic hole puncher punches completely through the material, addressing common issues.

5.3 Tips for Optimal Performance

• After continuously punching 50-70 holes, allow the machine to rest for 10-15 minutes to prevent overheating and ensure longevity.
• Always ensure the material is properly supported and aligned to achieve clean, burr-free holes.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your DEFIPRO MHP-20 hydraulic hole puncher.

6.1 General Maintenance

• Bolt and Screw Checks: After every 300-500 punching operations, inspect and tighten all bolts and screws, especially those on the sealing part between the bracket and the cylinder.
• Cleaning: Keep the tool clean and free from metal shavings and debris. Use a dry cloth to wipe down the exterior.
• Hydraulic Oil: Periodically check the hydraulic oil level and replenish as needed using the provided hydraulic oil can. Refer to the maintenance section of the full manual for specific oil type and refill procedures.
• Carbon Brush Replacement: The carbon brushes are consumable parts. Replace them when they are worn down to maintain motor efficiency. Refer to the full manual for replacement instructions.

7. Troubleshooting

7.1 Punch Not Going All the Way Through

If the punch does not fully penetrate the material:

• Rotate the Over Mold: Try rotating the upper mold (die) to ensure proper alignment and engagement.
• Check Gasket: Ensure the round metal gasket is correctly installed under the lower mold. If necessary, remove it and reinstall to ensure full punching depth. Keep pushing the switch key during this process.
• Material Thickness: Verify that the material thickness is within the specified limits of the puncher.

Video 7.1: Instructions on how to ensure the punch goes all the way through the material.

7.2 Die Not Retracting / Over-pressured

If the die does not retract after punching or the system feels over-pressured:

• Relieve Pressure: Locate the pressure relief screw, typically on the bottom side of the unit. Gently loosen this screw to release pressure, allowing the die to retract. Remember to tighten the screw before subsequent use.

Figure 7.1: Location of the pressure relief screw for die retraction.

7.3 Operation in Cold Weather

If operating in colder weather, the machine may vibrate more when punching hard metal. To protect the motor housing, avoid punching in extremely cold conditions if possible. Allow the machine to warm up slightly in a moderate temperature environment before heavy use.

7.4 Motor Sounds Rough or Smells Burnt

If the motor exhibits unusual sounds or a burning smell:

• Immediately disconnect the power.
• Check for any obstructions in the punching mechanism.
• Inspect the carbon brushes for wear. Replace if necessary.
• If the issue persists, contact customer support.

8. Warranty and Support

8.1 Product Warranty

The DEFIPRO MHP-20 hydraulic hole puncher comes with a 3-year warranty. Punching dies and other accessories are covered by a 1-year warranty. This warranty covers manufacturing defects and ensures product reliability under normal use.

8.2 Customer Support

For any questions, technical assistance, or warranty claims, please contact DEFIPRO customer support. Provide your product model (MHP-20) and purchase details for efficient service. We aim to provide a satisfactory response within hours.