AXA quick change tool post install on 9x20 lathe

This is my central machinery 9 by 20 leave it has a Shem type tool post on it and those they're adequate and you can get by with it but if you spend any time changing tools at all you quickly discover what a hassle they are a lot of people have changed them out to AXA type quick change tool posts which is what I'm going to do and there's been a variety of different ideas on how to adapt it I'm going to show you what I came up with we'll simply remove the existing tool post off of the carriage and there is a indexing key that you need to take out of the carriage just to save it for future reference we don't need it any longer there's a small spring underneath the indexing key that gives it its upward force to engage in the bottom of tool post we no longer need those the new indexing head comes with a block of material for making your own tea nut but obviously this little length does not use a tea nut and so we'll just be taking that off and not using it at all once that's off the center mounting bolt through the indexing head just lifts out on the top and now you see we have a half-inch diameter hole with a much smaller mounting bolt some people take this carriage all apart rebuild the whole thing or build bushings for it I want to try something different so what I'm doing is with that indexing head in place I'm going to use a 5/8 shoulder bolt that I'm going to turn down so that it fits in the half-inch diameter hole I want to retain as much material as possible and the 1/2 inch bolt was just a little sloppy through that hole so I'm going to make it much more precision and cut it off so that I have an inch inch and a half of just good tight shoulder dropping down into the center of my tool post once I cut it off I'm going to check it up in the lathe drill a hole all the way through it and then thread that hole so that it will essentially be an internal or a nut that will drop down to the center of the tool post and screw onto the mounting board so in addition I've got this little washer that will set on top and when I put this in with a hole through it it should tighten down on there and do me a good job so let's give it a go so I've removed all of the threads from the bolt leaving just the shank that was smooth that's going to give me a little over about an inch and three-eighths of threads to engage on the tool post mount I faced the end of the bolt and I faced the bottom portion of the bolt head so that it will sit flat on the washer on top of the tool post my next step is going to be Center drill and then drill and then tap the threads for the mounting bolt after center drilling I'm going to pre-drill with a quarter inch bit and then I'll finish out the hole using a 1764 which is about two hundred sixty six thousandths good-sized bit for the eight millimeter thread size use a little cutting oil in the process maybe you know burn everything up I've completed the pre-drill with the quarter-inch and then the 1764 final drill so we're set for the thread size take out the Jacob's check and install a dead center and we'll be using that as the guide for the tap have a little trim tap we'll be using for the cutting oil use our dead center for our limit and we're set the starts ready as I've been threading this just doing it by hand bear in mind that I am using a cheesy Harbor Freight tool tap and I'm having to be super careful this bolt is galling up cutting the threads and highly recommend that a lot of passes be made with frequent clearing of the chips I just don't think that this tap is going to put up with much abuse and it would probably fracture pretty easy in there so exercise lots of caution I finished running my tap through several times we'll do a just final last level threads are all nice and clean going to touch up the bird now we're all set to test it out this is a handy little countersink deburring tool works wonderful on projects like this you can just run them by hand but I'm going to check this one up on the lathe real quick nice and clean earlier in the video I had to remove the old tool post just to make it a little easier to see the drilling and tapping process since that time I've removed the indexing key along with a support spring and cleaned the carriage up so it's ready to try on the new quick-release tool post slip that on there and with the newly made nut from the bolt and a washer which by the way this washer washer was a half inch I simply reamed it out just a tiny bit to make it fit over the new nut assembly line it up on there thread it on it's quite nicely there's only five thousandths of clearance between the tool post and the the shouldered bolt if you will or nut in hindsight I would say that was probably not necessary to turn the outside of that down from a 5/8 I think a half inch bolt to begin with would have been just fine that little bit of slop wouldn't have made any difference so you could simply do the exact same thing and just cut off the excess part of the bolt that's not needed drill it tap it and you should be good to go the other thing that I not really happy with is I wasn't able to find this this bolt and a metric size I wanted to keep a metric head on it so that all my tooling for this lathe was metrics but I couldn't do that so I have to settle for SAE and this is a fifteen sixteenths wrench that I'll have to chase down every time I or keep one in here or something like that so I can change out the position of the head but all in all I'm very satisfied with the project came out good locks in nice and feels very one more thing to mention is of course the use of safety equipment if you're doing this without appropriate eye protection or wearing jewelry or long sleeves you're knucklehead and shouldn't be on the lathe anyway if you want to comment you can but I really don't care either you enjoy the video and it helps you or it doesn't thank you and have a great day
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