The double-end surface grinder series grinding wheel and the extension shaft can be fastened with screws or with adhesive. The following points should be paid attention to when installing the internal grinding wheel:
1. The end face of the extension shaft and the end face of the screw that bear the grinding wheel of the double-end grinding machine should not be uneven, and the contact surface should not be too small, otherwise the friction area will be reduced, and the reliability of the grinding wheel fastening cannot be guaranteed.
2. The rotation direction of the tightening screw cannot be the same as the grinding wheel of the double-end grinder, otherwise the grinding wheel will automatically loosen under the action of the grinding force. At present, the direction of rotation of the grinding wheel in the double-end grinder and universal external grinding machine produced in my country is counterclockwise, so the direction of the tightening screw should be right-handed.
3. The matching clearance between the inner hole of the grinding wheel of the double-end grinder and the journal of the extension shaft should not be too large or too small. If it is too small, it is easy to burst the grinding wheel; if it is too large, the grinding wheel will be heavy and cause vibration. The gap between the grinding wheel and the extension shaft is related to the fastening method. It should not exceed 0.2mm when tightening with screws, and should not exceed 0.3mm when tightening with adhesive. If the gap is too large, a piece of paper can be inserted between the extension shaft and the inner hole of the grinding wheel to narrow the gap.
4. The two end faces of the grinding wheel of the double-end grinder cannot directly contact the shoulder of the extension shaft and the end face of the screw, but should be filled with soft pads such as yellow paper, and the thickness is preferably 0.2mm~0.3mm. In this way, the inner grinding wheel can be evenly stressed and fastened reliably.
