Valve seat grinding stones Henan Mining Machinery Co., Ltd.
DIY valve seat grinding Grassroots Motorsports for. The Die is a very odd size That makes them either very expensive or very cheap I got lucky and found it cheap 9 16"16 to suit grinding stones made for old black and decker valve seat grinders A 1125" stone, a new 7mm drill bit and some 7mm drill rod Some scrap 1" aluminum rod saced itself to the lathe to bee my arbor