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Milling boring bar set 100$

justin1

Ultra Member
Not sure on location or if they still have it. But look like good deal to me


Screenshot_20241224-233823.png
 
OK, so what are these for ? I know what they're for but I have a boring head (a very nice one) for the mill and bars for the lathe, both of which I would guess to be quicker and more adjustable.
 
OK, so what are these for ? I know what they're for but I have a boring head (a very nice one) for the mill and bars for the lathe, both of which I would guess to be quicker and more adjustable.
These look like shop made boring bars probly just doing sleeves or cylinder Type work were a adjustable boring head may not be ridged enough with long extension or may just not fit.

Also saves on head room for the mill.

They are also cheap compared to stuff like these.

boringbigkaiser_carbidebar_aug16.jpg


I too own a nice boring head for the mill but I can see those bars coming in handy for certain applications. That and you cant beat the rigidity of a straight bar. My boring head can do something like a 5" hole but not as fast as dedicated bar. I would also have to do couple spring passes to clean up deflection.

17351614887535103654265383338822.jpg
 
I use them on my HBM. I have a few already up to about 4-5”diameter and maybe 16” long. All home made.
 

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