Selection and installation of high-speed steel saw blade grinding wheels

1. Specifications and materials of grinding wheels

The grinding wheel used in high-speed steel saw blade grinders has a diameter of 150mm and a hole diameter of 25mm. The thickness is determined by the saw blade's tooth profile and pitch. The grinding wheel material is selected based on the saw blade's material. Based on experience, the grit should be between 60 and 100, with a hardness between K and N. Ceramic-bonded grinding wheels are primarily used, but other types, such as resin-bonded and rubber-bonded, are also commonly used. It is crucial to select a high-quality, well-balanced grinding wheel in each application.

2. Grinding wheel clamping cover and intermediate protection sheet

A new machine is shipped with a set of grinding wheel clamping covers and an intermediate protective sheet. The intermediate protective sheet is made of a strong yet flexible black rubber and provides a flexible connection between the grinding wheel and the clamping cover. If left unused, the grinding wheel can easily burst, which is extremely dangerous. When replacing the grinding wheel or clamping cover, pay special attention to cleanliness to prevent dust, grinding chips, and foreign matter from entering the grinding wheel spindle bearings. Also, be careful not to damage the clamping cover when installing or removing it.

3. Selection of grinding wheel thickness

The thickness of the grinding wheel is selected according to the tooth shape and pitch to be ground. The thickness of the grinding wheel used for arc teeth is about 1/2 of the pitch to be ground, and its side shape is semicircular. The thickness of the grinding wheel used for triangular teeth is about 1/3 of the pitch to be ground, and its side shape is acute.

4. Installation and testing of grinding wheels

Before installing the grinding wheel, check whether it is damaged. When installing the grinding wheel, make sure it is installed without any difficulty. However, be careful not to oversize the gap between the grinding wheel hole and the grinding wheel clamping cover, otherwise the grinding wheel will generate centrifugal force and cause vibration and noise. After installation, test run the grinding wheel for a few minutes. No one is allowed to enter the danger zone during this time.