Technical Data Sheet

Product: Centerless Polisher
Brand: Hegenscheidt
Model: 7489
Year of Manufacture: 1988
Weight: 1200 kg
Working Area: 12-60 mm
Speed: 60/120 meters per minute
Bar Length: 4000 mm
Rolling Force: 500-40000 N
Installed Power: 3 kW

Technical Description

Things

The Hegenscheidt Model 7489 Centerless Polisher is a machine tool designed to perform polishing operations on cylindrical or specially shaped workpieces without the need for traditional centering. This type of polisher is primarily used in industrial environments to improve the surface finish of metal components and other materials. The machine uses a rolling and abrasion system to achieve smooth, uniform surfaces.

What is it for?

The Hegenscheidt 7489 polisher is used for:

• Surface Polishing: Improve the surface finish of parts by removing imperfections and achieving high-gloss surfaces.
• Grinding and Finishing: Remove thin layers of material to achieve precision tolerances and desired surface finishes.
• Machining of Pieces Without Centering: Polishing irregularly shaped or cylindrical pieces without the need for traditional centering.

How to use it

Using the Hegenscheidt 7489 centerless polisher includes the following steps:

1. Preparing the Machine:

   • Initial Inspection: Verify that all moving parts and control systems are in good condition. Make sure the machine is clean and free of debris.
   • Parameter Setting: Adjust the working speed and rolling force according to the specifications of the workpiece and the type of abrasive used.

2. Preparing the Piece:

   • Assembly: Place the workpiece in the machine's work area. Make sure the workpiece is securely fastened and centered correctly.
   • Abrasive Selection: Choose the appropriate abrasive for the type of material and the desired degree of finish.

3. Polishing Operation:

   • Starting the Machine: Start the machine and set the operating speed. The machine will begin polishing the workpiece as it rotates and abrades.
   • Monitoring: Monitor the process to ensure that polishing proceeds smoothly and without excessive abrasive wear.

4. Inspection and Maintenance:

   • Workpiece Inspection: After polishing, inspect the workpiece to ensure that the surface finish meets the requirements.
   • Maintenance: Clean the machine and check the condition of the abrasive and other components.

Materials used

The Hegenscheidt 7489 polisher is designed to work with various materials, including:

• Ferrous Metals: Steels, cast irons.
• Non-Ferrous Metals: Aluminum, copper, brass.
• Special Alloys: Titanium alloys and other high-strength materials.
• Plastic and Composite Materials: If equipped with the right abrasives, it can also be used for non-metallic materials.

Types of polishers

There are different types of polishers, each designed for specific applications:

1. Centerless Polisher: Like the Hegenscheidt 7489, ideal for irregularly shaped workpieces and for high-precision work without centering.
2. Disc Polisher: Uses rotating abrasive discs to polish flat and curved surfaces.
3. Belt Polisher: Uses abrasive belts for polishing and finishing metal and plastic pieces.
4. Drum Polisher: Used to polish small workpieces en masse using a rotating drum.

Maintenance of a used polisher

To keep a used polisher in good condition, follow these tips:

1. Cleaning: Regularly remove abrasive residues and dust from the machine.
2. Lubrication: Make sure moving parts and drive mechanisms are well lubricated to prevent wear.
3. Component Check: Periodically check the wear of the abrasive parts and replace them if necessary.
4. Alignment: Check and adjust the alignment of the abrasives to ensure uniform polishing.
5. Safety Check: Make sure all safety devices are functioning and in good condition.

Checking the good condition of a used car

Before purchasing a used polisher, it is important:

1. Visual Inspection: Check the machine for signs of wear and damage. Examine the table, bars, and moving parts for any defects.
2. Operation Test: Turn on the machine and test its operations to ensure that all functions, such as speed and rolling force, are operational and working properly.
3. Parameter Check: Verify that the machine can achieve the specified speeds and rolling forces and that these can be adjusted precisely.
4. Documentation and Certifications: Ensure that the machine is accompanied by all necessary documentation, including any safety and compliance certifications.

Why it's better to buy used

Buying a used polisher like the Hegenscheidt 7489 can offer several advantages:

1. Cost Savings: The cost of a used polisher is generally much lower than a new model, making the purchase more affordable.
2. Reliability: If well maintained, a used machine can offer reliable and long-lasting performance.
3. Immediate Availability: Used polishers are often available immediately, avoiding the wait for production and delivery of new models.
4. Resale Value: Used machines tend to retain a good resale value, allowing you to recover some of your investment.

In conclusion, the Hegenscheidt 7489 polisher is a robust and precise machine, ideal for polishing and finishing a wide range of materials. Purchasing a used model can be a cost-effective and operationally advantageous option, provided it is carefully inspected and maintained.