-
Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.
Anyone know what this tool set is used for?
- Thread starter ttlrfrank
- Start date
Yes it is a set of valve seat cutters.
Brent H
Ultra Member
For cars @John Conroy?
For some kind of engine. Could be agricultural or industrial
Some kind of scale to see the size would be helpful
fwiw - I dont have scale for above pictured set; was discussing products online with someone overseas and they tossed this picture my way as a response....
was thinking about a number of tools...may have mentioned to them hand reamers (typical type, not like these specialized ones).
I'm looking for a source that has decent-made incremental reamers...like 0.5 or even 0.1mm increments.
Most on Aliexpress are full mm and there are a few sets that have smaller diameters in 0.5mm increments...but they seem to stop when you approach 10mm.
Anyone got a different source?
was thinking about a number of tools...may have mentioned to them hand reamers (typical type, not like these specialized ones).
I'm looking for a source that has decent-made incremental reamers...like 0.5 or even 0.1mm increments.
Most on Aliexpress are full mm and there are a few sets that have smaller diameters in 0.5mm increments...but they seem to stop when you approach 10mm.
Anyone got a different source?
It’s for cars I haven’t seen those since grade 12 at Vic High automotive class those stones should be threaded on the other side. The stones screw onto a mandrill that fits onto another mandrill that slides into the valve guides lining it up square then it is spun with a drill grinding the surface before lapping with grinding paste using a stick with a suction cup.
Brent H
Ultra Member
@Tom O : we had a set for cutting in globe valve seats (very similar) but looking at it now the sizes do not range enough in size. Our kit went from the wee valves (1/4" ) all the way up to 3" - same type system. we have a lapper on the ship but it uses the valve itself and a speed handle. Back at the college we had just the stones for a few Diesels that were the "practice engines"
Yes you push the "punches" into the valve guide (they are tapered), then slid on the cutter to the "punch" and turn the cutter. May of them have a special T wrench that slides over the "punch" and the cutter has a hex cut on the top of it the wrench grips on to cut the seats by hand. Also that set has a nice assortment of diffrent degree cutters, which is handy for doing 3 angle valve jobs. I can't remember off the top of my head the 3 degrees you need to cut a set to obtain the 3 angle valve job.
The ones with the carbide blades are for roughing the 3 angles 30, 45 and 60 degrees. The plain looking ones with no blades are diamond lapping cutters for finishing. These are common in motorcycle repair.
https://www.aliexpress.com/item/4000452585952.html
https://www.aliexpress.com/item/4000213345508.html
Grinding valve seat with stones was more common in automotive repair. I have a Sioux valve seat grinder and a large selection or stones that I still use quite often.
content://com.android.chrome.FileProvider/images/screenshot/1611933278501450357665.jpg
https://www.aliexpress.com/item/4000452585952.html
https://www.aliexpress.com/item/4000213345508.html
Grinding valve seat with stones was more common in automotive repair. I have a Sioux valve seat grinder and a large selection or stones that I still use quite often.
content://com.android.chrome.FileProvider/images/screenshot/1611933278501450357665.jpg
Attachments
I'm not set up to grind valves, I have a friend who runs an engine machine shop and he does them for me ($50 for 16 valves) so it's not worth having a valve grinder around. It could be done in a lathe with a tool post grinder but the valve faces need to be concentric within .0005" so it's too much of a PIA for me to bother with. I had a Sioux valve grinder but there was enough wear in it that it could no longer give the results I wanted so I got rid of it. I have replaced valve guides on some motorcycles and some Chevrolet small blocks as I have the correct reamers for them. If I don' have the reamers it's not worth it as they are quite pricey. I do have the Sioux valve seat grinder and stone truing accessory as well as a large selection of stones so I could help you there. After this pandemic craziness is over bring the head and some beers and we can take it apart and check what it needs. This is some pics from a 1968 Honda CL450 head I did. I have the correct 6mm valve guide pilot for that engine and I was able to buy NOS valves for a reasonable price.
