SB Heavy 10 - Tool Post Question

[Dusty Stevens]

That’s some good info. There could also be a problem with the dovetail fitting the tool holder. I notice mixing them on mine they all don’t fit the same.

Ive had to file some of my cheaper ones to fit just on the flat part. It seems like if they dont fit its just a few thou away.

 

[Dusty Stevens]

I think for the most part, it depends on the size of the machine. Too big a tool post won't go below the centerline of a small lathe. All that I can recall simply mount to the compound with a tee nut. There may well be exceptions to this but I think this is generally the case with most all lathes.

And the tee nut comes oversize and has to be fit

 

[gunsandgunsmithing]

That’s some good info. There could also be a problem with the dovetail fitting the tool holder. I notice mixing them on mine they all don’t fit the same.

Dovetail? Do you mean the tee nut on the bottom?

 

[gunsandgunsmithing]

That’s some good info. There could also be a problem with the dovetail fitting the tool holder. I notice mixing them on mine they all don’t fit the same.

The bigger tool posts often will work with normal cutting tools but cutoff tools can be a problem. I got one CXA on a GHB1340 Taiwan Jet. It's borderline tool tall with some cutoff tools. If you use indexable tool holder cutoff tooling, it may well set low enough, vs a hss blank. Of course you can put the cutting edge lower on the hss cutter, yourself when you grind it.

 

[hoz53]

Dovetail? Do you mean the tee nut on the bottom?

I meant the dovetail the tool holder slides on. I’ve only got BXA size one aloris and one knock off. In my limited experience once the tool holder will slide on the tool post of the ones I’ve got I have plenty of adjustment to position my tool. Thanks

 

[hoz53]

And the tee nut comes oversize and has to be fit

And if you wanna buy one of those Tnut blanks from aloris-well they don’t give em away.

 

[Dusty Stevens]

And if you wanna buy one of those Tnut blanks from aloris-well they don’t give em away.

As rough as they are they should. I bought my first one but spent 15mins making the rest ive had to have since then

 

[hoz53]

As rough as they are they should. I bought my first one but spent 15mins making the rest ive had to have since then

My first one came with the toolpost. I wouldn’t buy any individually from them. I just make them out of some scrap I’ve got around

 

[tobnpr]

Phase II, wedge-type, AXA for that lathe is a good compromise for budget and quality.
I see no reason for a BXA on a 10", belt drive lathe used for smithing.
Most all of what we do is lighter cuts, and "tight" undercuts requiring smaller tooling to provide better access. 3/8" insert holders (or HSS) will get into the corner to face a barrel shoulder much better than a 5/8".
Yes, larger holders/tooling are more rigid than smaller, but IMO this is largely irrelevant for a small lathe used for barrel work.

A mill is needed to fit the t-nut to the compound rest with slip-fit precision.