Hand grinder technology: coarse grinding and fine grinding

Grinding with a hand grinder is an essential skill in various industries including stoneworking, concreteworking, and construction. This process involves using a hand grinder equipped with discs and abrasives to remove material and achieve the desired surface finish. Mastering the techniques and precautions of grinding is critical to obtaining efficient, high-quality results.

How to Use the Hand Grinder for Rough Grinding?

1. Preparation: Getting ready for rough grinding

Before you begin rough grinding, it is crucial to prepare your work surface and grinder for the task at hand. The working surface should be clean and flat to ensure stability and accuracy during the grinding process. Insert the chuck into the main bearing of the handheld grinder and install the appropriate grinding disc and abrasive. Choosing the right abrasive based on the workpiece material and desired finish is critical to obtaining the best results.

2. Operating skills: Master coarse grinding techniques

Choose the right speed:Choosing the speed of a handheld grinder is critical and should be based on the material of the workpiece and the type of abrasive being used. It is generally recommended that the rotation speed does not exceed 80% of the maximum rotation speed to ensure safe and effective grinding.

Abrasive feeding amount: The amount of abrasive feed should be appropriate, generally no more than 2-3 times the cutting width of the grinding disc. Proper control of abrasive feed is critical to achieving consistent and efficient material removal during rough grinding.

Operation method: Place the workpiece smoothly on the chuck of the hand grinder, adjust the height of the grinding disc, and position the contact surface between the grinding disc and the workpiece. As the grinding disc rotates, a constant speed is maintained during the feeding process, and a certain pressure and feeding amount are applied. This allows the grinding disc to gently rub the surface of the workpiece, effectively removing roughness such as red peak layer and surface bulges.

3. Precautions: Ensure safe and effective rough grinding

Selection of abrasive thickness: Selecting the appropriate abrasive thickness is critical to obtaining the desired surface roughness. Improper abrasive selection can result in surface roughness that is too large or too small. The thickness of the abrasive should be selected based on the material of the workpiece and the specific grinding requirements.

Working status check: During the rough grinding process, it is important to regularly check the working status of the handheld grinder. Check the disc and abrasive for signs of wear or deformation, as these can affect the quality and efficiency of the grinding process.

How to Use the Hand Grinder for Fine Grinding?

1. Preparation: laying the foundation for fine grinding

Before you begin fine grinding, it is crucial to prepare your work surface and grinder for the task at hand. The work surface should be clean and level to ensure stability and accuracy during grinding. Insert the chuck into the main bearing of the handheld grinder and install the appropriate grinding disc and abrasive. Choosing the right abrasive based on the workpiece material and desired finish is critical to obtaining the best results.

2. Operating skills: master fine grinding technology

Choose the right speed: When performing fine grinding, a lower speed should be selected, generally no more than 50% of the maximum speed. This lower speed setting allows for greater control and precision during the grinding process, helping to achieve a smooth surface finish and dimensional accuracy.

Abrasive feeding amount: During the fine grinding process, the feeding amount of the abrasive should be slightly larger to make full use of the cutting effect of the abrasive. Proper control of abrasive feed is critical to achieving consistent, efficient material removal and surface refinement during fine grinding.

Operation method: Place the workpiece smoothly on the chuck of the handheld grinder, adjust the height of the grinding disc, and position the contact surface between the grinding disc and the workpiece. As the grinding disc rotates, the feeding process begins, using fine oilstones and grinding wheels to grind to improve the surface finish and dimensional accuracy of the workpiece. This method enables precise material removal and surface refinement, helping to achieve the required finish and dimensional accuracy.

3. Precautions: Ensure safe and effective fine-grinding

Selection of abrasive thickness: Selecting the appropriate abrasive thickness is critical to achieving the surface finish and accuracy requirements required for your workpiece. Choosing the correct abrasive thickness is critical to achieving the desired level of material removal and surface refinement during fine grinding.

Prevent excessive wear: During the fine grinding process, care should be taken to prevent excessive wear of the abrasive. Excessive wear can cause premature abrasive failure and compromise the effectiveness of the grinding process. By monitoring and controlling wear, operators can ensure abrasive longevity and efficiency, helping to achieve high-quality results.