Hi,
I work at a truck dealership and have access to an old Kwik-way valve grinder. Is there any type of adapter that would allow the use of new style cutters versus stones. It takes a lot of time to shape stones and cut even three angles on the heads whereas the new type of cutters can cut everything all at once. Any advise on speeding up this task or tools that could help would be appreciated.
Rick

No there not any easy way do three angle with valve grinder. You just have to change angle on the valve grinder from 44.5 to 30 and down to 15. But there is a three angle vave seat grinder but it's expensive to buy but if you are serious to make Hp it's the way to. Hall-Toledo seat grinder is the brand that will grind radus seat in the heads.

http://www.hall-toledo.com

Hi,
I work at a truck dealership and have access to an old Kwik-way valve grinder. Is there any type of adapter that would allow the use of new style cutters versus stones.
Is this a VALVE grinder or a SEAT grinder? I don't know of valve grinders that don't use a stone--but--I don't stay in touch with latest developments.

It takes a lot of time to shape stones and cut even three angles on the heads whereas the new type of cutters can cut everything all at once. Any advise on speeding up this task or tools that could help would be appreciated.
Rick
Far as I'm concerned, a valve seat should be at least "kissed" with a STONE after being shaped with a CUTTER. Cutters are FAST; they are not BETTER than stones. A stone leaves a finer finish. Some guys vacuum-test the seats; I guess if it holds vacuum whether done by cutter or stone--it's OK.

I don't know why it would take a long time to shape stones. Most valve seat kits have a diamond-point stone facing tool. So you set up your stones with the angles needed (seat, top cut, bottom cut for both intake and exhaust)--and let 'er rip.

The big issue (that I know of, anyway) with old stone seat cutters is that the valve guide pilots get worn out.

This all coming from a guy who hasn't cut a seat for so many years it hurts. Take my advice for what it's worth (free!)

Is this a VALVE grinder or a SEAT grinder? I don't know of valve grinders that don't use a stone--but--I don't stay in touch with latest developments.


Far as I'm concerned, a valve seat should be at least "kissed" with a STONE after being shaped with a CUTTER. Cutters are FAST; they are not BETTER than stones. A stone leaves a finer finish. Some guys vacuum-test the seats; I guess if it holds vacuum whether done by cutter or stone--it's OK.

I don't know why it would take a long time to shape stones. Most valve seat kits have a diamond-point stone facing tool. So you set up your stones with the angles needed (seat, top cut, bottom cut for both intake and exhaust)--and let 'er rip.

The big issue (that I know of, anyway) with old stone seat cutters is that the valve guide pilots get worn out.

This all coming from a guy who hasn't cut a seat for so many years it hurts. Take my advice for what it's worth (free!)

=
This may have been true 30 years ago when the seat & guide machines were glorified drill presses but I can assure you that the only person today who will tell you that a ground seat is better than a correctly machined one is someone who does not have access to a good machine or who does not know how to use it correctly

Serdi, Newen, Sunnen to name the better known ones will all a very accurate job with no need what so ever to do the "interference" angles mentioned above which are a hold over from the stone days when it was better to err on the chamber side of the valve seating if there was any possibility of the valve & seat angles being different
In fact it is a very bad idea to use interference angles with some of the hard exhaust seats of today.

I still have my stones & vacuum cabinet but it does not get used for many valve jobs ;)

I prefer the second option in pic #2 :yes: