Anonymous

difference()
{
	cylinder(h=8,r=29/2,center=true); //Outside
	
	difference()
	{
		cylinder(h=6,r=30/2,center=true); //??
		cylinder(h=6.01,r=24.3/2,center=true); //Groove for bearing
	}
	
	cylinder(h=8.01,r=22/2,center=true); //Hole trough
}