Technical Data Sheet

Product: Centerless Polisher
Brand: Hegenscheidt
Model: 7489
Year of Construction: 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 pieces without the need for traditional centering. This type of polisher is mainly used in industrial environments to improve the surface finish of metal components and other materials. The machine uses a rolling and abrasion system to obtain smooth and uniform surfaces.

What is it for

The Hegenscheidt 7489 polisher is used for:

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

How to use it

Using the Hegenscheidt 7489 centerless polisher includes the following steps:

1. Machine Preparation:

   • Initial Check: Check 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 piece and the type of abrasive used.

2. Preparation of the Piece:

   • Assembly: Place the piece in the working area of ​​the machine. Make sure the piece is well secured 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 working speeds. The machine will begin to polish the piece as it is rotated and abraded.
   • Monitoring: Monitor the process to ensure that polishing proceeds smoothly and without excessive wear of the abrasive.

4. Control and Maintenance:

   • Inspection of the Part: After polishing, inspect the part to verify 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 different materials, including:

• Ferrous Metals: Steels, cast irons.
• Non-Ferrous Metals: Aluminium, 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 pieces and for high precision machining 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 parts 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. Checking the Components: 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.

Check the good condition of a used one

Before buying 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: Check that the machine can achieve the specified rolling speeds and forces and that these can be precisely adjusted.
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. Economic 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 waiting times for the production and delivery of new models.
4. Resale Value: Used machines tend to maintain a good resale value, allowing you to recoup some of your investment.

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