[Silver79]

Anyone recognize this valve guide machining tool? No luck with internet part# searches. I ordered some .531 stem seals for my current project and found this in my desk at work. I saw the 530 stamp on it and now am wondering.

 

[1968 hot rod]

Measure the distance between the closest carbide insert and the pilot.
Add that to half the pilot dimension and multiply by 2.
that should give you the approximate diameter it will cut.

 

[Silver79]

Thanks, I measured the distance between the two carbides at their closest point and it was .530"

I've not machined valve guides for positive seals before, does anyone have input as to the profile of the upper cutter and its chamfer? Does it look like others you have used? I suppose I could do some testing if I can find a junk head.

Thanks

 

[BillyGman]

I just saw one like that last week. I think it was on the Isky Cams website

 

[sleeper]

It is a cutter to cut your guides to .530/.531. Looks like the pilot is .343 or 11/32. There should be a set screw on the other side so you can take the pilot out and exchange to 3/8 or .371 if needed. I would take the pilot out and polish the rust off it so it not damage the guide.
You can use this with a slow drill and a steady hand. I would practice first. It is better to use a bridgeport with a rotating table but most folks don't have that. A drill will work. Put some grease on the pilot before inserting it into the guide. Should work fine.

 

[BillK]

It is a cutter to cut your guides to .530/.531. Looks like the pilot is .343 or 11/32. There should be a set screw on the other side so you can take the pilot out and exchange to 3/8 or .371 if needed. I would take the pilot out and polish the rust off it so it not damage the guide.
You can use this with a slow drill and a steady hand. I would practice first. It is better to use a bridgeport with a rotating table but most folks don't have that. A drill will work. Put some grease on the pilot before inserting it into the guide. Should work fine.

Actually I have the best luck just doing them by hand on the bench. I use an air drill and do at least a set a week. Have been doing them that way for the last 30 years or so. I did a set today and used my 20V Dewalt drill and it worked fine. Nice not having the air hose attached

The guide od is not as critical as you would think. The modern seals will work just fine a few thousandths either way.

I agree with practicing on a junk set of heads if they are available but it really is not very difficult.

 

[Kirk]

I have done a couple sets with a drill, seems higher downward pressure on drill while doing them gives a cleaner finish. If I was careful and used light pressure I got uneven finish on top of guide. (you could "see" cutter marks)
Just posting my experience hope you can test your cutter first.You probably know this but only go as far as you need to for retainer to seal clearance at your advertised valve lift......maybe add a little more for future updates but the longer you keep the guide the better

 

[Silver79]

Thanks for all the help guys. Made an arbor and it worked well. Thanks again. Love this place.