The metal surfaces will rust if they are dry and not installed. When they are installed correctly, the seal surfaces are very tight and will not rust as water and air will not be able to get there. The part facing the rubber is also sealed. The only area that is subject to rust is the outer side which will not effect the seal preference. Thank you for watching.
don't they rust, for example if the machine has been standing idle for month' ?
The metal surfaces will rust if they are dry and not installed. When they are installed correctly, the seal surfaces are very tight and will not rust as water and air will not be able to get there. The part facing the rubber is also sealed. The only area that is subject to rust is the outer side which will not effect the seal preference. Thank you for watching.