Round blanks

[jbeyer]

I just got some 3/4" tru stone blanks. I wanted to know what the size goes down to when it's rounded enough to go into a collet.

Jonathan

 

[skiprat]

This may be a dumb answer, but theoretically, if you turn it perfectly between centre then you should still get 3/4 round:wink:

 

[sefali]

It would depend on how accurate their measuring, and your centering are. A perfectly square 3/4 blank, mounted exactly on center, could be turned to 3/4 round. In reality, I'm sure that's a relative rarity. Figure on just slightly under 3/4.

 

[ldb2000]

Mine are usually between 5/8" and 11/16" but I have had one or two that came out at 3/4" , they were just plain dumb luck though .

 

[fernhills]

I would shoot for 5/8" so you are not under 3/4" b/c that is bad for your collet if you are under dimensioned. Carl

 

[ed4copies]

I just got some 3/4" tru stone blanks. I wanted to know what the size goes down to when it's rounded enough to go into a collet.

Jonathan

Have you measured them to see what their REAL dimension is?

That will determine what you can hope for. Your "center marking" will determine what you GET.

 

[jocat54]

Mine are usually between 5/8" and 11/16" but I have had one or two that came out at 3/4" , they were just plain dumb luck though .

Mine come out the same as Butch's. (usually):biggrin:

 

[SteveG]

If you are going to drill the blanks on the lathe you can turn them down to desired 3/4'' size, leaving some small flats on the blank, and they will drill just fine, leaving you the max size on the blank for the next step.