Line bore using a lathe.

[early]

Different line bore method. Weird huh?
Thoughts?

https://www.facebook.com/share/r/1F9NNYni3U/

[BFB]

you should actually copy & paste the article or if its a video post it here. not everyone has FB and unless you let FB corrupt everything in your computer system by joining , FB won't let you view FB.
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[Brian_e]

Not sure how they can do the whole line bore that way.

I wanna see what they did on the nose end to hang onto all that weight swinging around. I think they are only trimming the #1 in that video? Maybe not.

Rimco, and lots of others have used the lathe to line bore cases, but they mount the lathe on the carriage, and the bar between centers. Then run the carriage to feed the case into the bar.

Brian
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[RWK]

The case is usually mounted on the cross slide, (need a large lathe) to a fixture,
case is located on the flywheel flange side and or cyl. deck, fixture would look like a large angle plate, boring bar is spun in the chuck supported by tail stock, case is traversed along bar.
This is how I have seen it done, some larger lathes have T slots on cross slide to bolt tooling to. It seems Rimco used to do it that way, not sure tho
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[mcmscott]

Notice in the vid there is a bearing in the case, they are modifying a bearing.
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[jbbugs]

It looks like there's a bearing in the case.
Notice the groove?
Just seems like a really bad idea.
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[chrisflstf]

I cant imagine how you could get the case, that far away, to run true. Seems wobble would be hard to get rid of spinning it in that manner

[early]

[bedlamite]

That looks like the hard way.

If you have a lathe and basic knowledge on how to use it, you could build a proper boring bar.

[liquidrush]

As a guy who runs a lathe pretty much daily I can tell you I've had some off-shapen and odd stuff chucked up over the decades. If you can mount up, maintain rigidity and center you're golden. If you have enough lathe you can do some stuff on it. I learn and figure out stuff all the time. Earlier this summer there was an elderly gentleman in the store and he overheard me talking about multiple start threads and how to do it. Turns out he was machinist by trade and long since retired and he offered to teach me how to do it. He was incredibly nice and patient with me, especially when I wanted to use indexable inserts and he wanted to grind bits. I agreed with him about how grinding a hss tool definitely has its place and I showed him the ones I use. He was fine with the carbide, he said he never really used them. . We were back there messing around for almost two hours. There's no better teacher than an older retired machinist.