bulletpruf said:
That’s problem #1 - the exhaust valve seats are 37.5 degrees. Have not found stones ground on that angle yet.
It would cost me $400 or so to get set up with Neway cutters for these heads but I can get cutters with the correct angle.
There seems to be three groups of interchangeability in the different stone grinders so that is something to watch. Sioux seems to have the strongest following.
Thanks
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I have the wheel truing fixture that uses a diamond tipped tool. You also can use it to change the angle of a stone. Typically you need 3 different stones so that you can raise or lower the seat contact area to match the center area of the valve face. Also some seats are spec'd at .5 degree difference to allow some wearing in and keeping a smaller contact area. I believe its supposed to keep the area cooler. I am not a 100% certain how mission critical it is though. Also you have to figure out what diameter stones you need because the pocket area of the head will only allow a certain size to fit in. And typically the size difference between the intakes and exhausts work out that you need different diameter stones for them, basically meaning you will need 6 different stones. I haven't done any diesel engine work, but from looking at the Goodson Tool site over the years I see that they have different stone composition for the super hard seats used in diesel engines. The $400 offer ^^^ seems like a great deal even paying the shipping from one side to the other.
I have the wheel truing fixture that uses a diamond tipped tool. You also can use it to change the angle of a stone. Typically you need 3 different stones so that you can raise or lower the seat contact area to match the center area of the valve face. Also some seats are spec'd at .5 degree difference to allow some wearing in and keeping a smaller contact area. I believe its supposed to keep the area cooler. I am not a 100% certain how mission critical it is though. Also you have to figure out what diameter stones you need because the pocket area of the head will only allow a certain size to fit in. And typically the size difference between the intakes and exhausts work out that you need different diameter stones for them, basically meaning you will need 6 different stones. I haven't done any diesel engine work, but from looking at the Goodson Tool site over the years I see that they have different stone composition for the super hard seats used in diesel engines. The $400 offer ^^^ seems like a great deal even paying the shipping from one side to the other.
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Pic of one of the carbide style cutters.
Andre, if you mean does it have the ability to grind multiple angles on the valve seat, then yes if I remember correctly it's accomplished by using different stones on each seat in the correct order. I already have a complete set of Neway carbide valve seat cutters in various angles that I use for cylinder head work. I may try to incorporate some of the hardware from the b&d setup to use in conjunction with the Neway cutters to use on the Bridgeport. As to using the valve grinder for machine tool sharpening, I have been wondering the same thing and to that end I purchased a different Quick-way valve grinding machine that I will attempt to modify for that purpose. Will be a while before I get to that, but when I do I will post the results. Thanks, MikePic of one of the carbide style cutters.
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