I just rolled up on this video today, if no one answered the pressing question yet, the 1st digit after the dash is the size/series of tool holder, 0XA being the 0xx, AXA=1xx, BXA=2xx, etc. the middle digit is the compound assembly such as the knurler and the tool post itself, the 3rd digit is the tool style, xx1=straight tool, xx4=boring bar, xx7=cutoff, etc etc. after a year I assume you worked this out but even though your lathe is a 10", and you could barely get that 1/4" shank to center up you need to go down to the 100 (AXA) as that would give more travel up/down.

Same situation with same questions. Answered them all. Thanks.

You won't believe I don't have a mill that I can put on so I did all my cutting of block with a saw

250-000: 250 is the type of post and 000 is the size of the post, 250-100, 250-200 and so on.
Regarding the post size and type, if it like the one you have, says 250-222, its a size 2 wedge tool post. A piston tool post at same size is 250-202 and so on. This means you can use all 250-2xx tool holders for both types of tool posts. Hope it make any sense.

The order of machining you have undertaken is well thought-out.  It pays to plan ahead.  Thanks.

Installation looks really good. I can’t wait to see it in action.

The first "dash number," as you call it, refers to the size the second two numbers refer to the type of tool holder

Good stuff, thanks.

The first digit after dash is the size 1= AXA, 2 = BXA, 3 =CXA.

The importance of a friend with a milling machine… 😂

I’m so glad you have issues.

thanks u cleared up a few questions before i buy a post , trouble is not having access to a milling machine , only thing i can think of is to take off the slide and take it and the block to a shop ... more $$$$ , my lathe is about the size or maybe a little smaller so the axa sounds like the go

Here is a way to make a T-nut for the tool holder using a lathe if you do not have a milling machine: https://www.youtube.com/watch?v=-SWEEgdFMFs&list=PLGfoCtzNfeSCGPh4kyw2Mm9727d756V-N&index=58

I have the AXA. The only difference between BXA and AXA is the tool post. they both have the same holders. I am cheap also. Cost from Ebay $89.01

Sorry I was wrong. Last numbers start with a number 1. Yours start with a 2

There's a shortcut to finding a quick-change toolpost.  Stay away from the internet it's the information cow-path (watch your step).  Go to your local machine tool dealer and bring the make, model and year of your lathe.  Your machinery dealer will help you find  sonething that will fit the lathe and your personal needs.  It's much easier to ask questions when you're talking to a real person rather than a keyboard.

I had the same issue with my gooving tool as well. But I was able to lower the tool holder further by turning the top compound slide. Also it's possible to find someone on ebay mass producing T-nuts. The Southbend 9" inparticular is easy to find one for.

Your not the last person! I just bought a beautiful 1900-1920 lathe and im using that exact tool holder still. Lol. And you had the same questions I did. I just realized the other day that its lucky i just bought a mill so I can fix this issue when mine gets here. Lol

I just did mine today and had to make plate fit

i thought 250 was AXA ? o boy now iam lost and the point of bigger post if your size overlaps. now iam more cornfused.