Made Some "Big" Threads

[Kevin T]

Hello Keven T. The mounting brackets I would (will sometime) make would be for a 4way tool holder to fit my Enco 13x40 lathe. It would have three pieces, the base to be clamped in the 4way , two 1/2" thick arms perpendicular to the lathe ways and having 1.250" holes bored. The 1.250" holes would be made to clamp the 1.250" boring bar. Different size holes would require different size arms or possibly split bushings. Clear as mud, right". Will try to make a sketch.

From your picture I think my clausing is near the same size, really a bit small for a 1.250" boring bar unless it was made to replace the compound rest. Probably not a good way to cut threads.
Have a good day
Ray

Do you mean like this vintage Willaims unit?

 

[Kevin T]

Got past the hump of the collar project! It was a precarious setup without a good boring bar but I found an old lantern tool that did the job. i had to shim it in the tool holder because the shank wasn't square!






I'll probably drill the spanner holes next and then shape the OD of the part. Not sure about a knurl like the one I am replacing. I like to work close when using collets and a fresh knurl might be a hazard!

 

[rock_breaker]

Again outstanding work Kevin T! The plan I am thinking of is constructed 0f all rectangular parts and is held in place by 3 5/16" set screws. Your lantern tool is better as it puts the cutting forces more directly into the lathe frame.
Not much experience with knurling tools but understand the need for strength and ease of use.
Have a good day
Ray

 

[Weldingrod1]

Dont be afraid to skim the od of a knurl to make it less fang-y!

Sent from my SM-G892A using Tapatalk

 

[Kevin T]

I realized I didn't post the finished product! Turned out really nice. I added three spanner holes 120 degrees apart from each other which IMO is how the original should have been.





I'm calling my male thread my spindle thread master and treating it as such. I finally found a use for the printed thread protector I bought when I refurbished my machine. The only thing left to do is to steel stamp the thread size on the bottom.

 

[rock_breaker]

Outstanding work!
Have a good day
Ray