what to do with a free scrap dumpster find ?

just some more pictures. almost done with the shaft but decided to order a long drill to finish the id clearance for the draw bar. i'm tired of fighting with boring bars sticking out a mile

took some length off the casting for the spindle just a starting point until i decide where the final length is going to fall. should make for a stiffer spindle so that's an added bonus.

 
         

    managed to finish up the shaft except adding the drive dogs, i will probably do that today but things work as they should now. i had to rework the bore behind the taper since it cut small the first time but it is fixed now, i'm not sure why but my guess is i had the boring bar out to far and it was pushing away from the cut, that part of the internal work is about impossible to check with bore gauges so it needed fixed regardless.

taper lock pulley fits so everything looks good so far. i started working on a labyrinth seal for the front end but it is slow going. only thing i could find to make it form was 316 S.S. which is a pain to drill with HSS drills and boring it out on the lathe is a pain just because i can't get a good chip when cutting and have nothing but stringers always something with this little tink toy of a lathe i have

managed to get the drive dogs done and have my labyrinth seal finished and the mounting sorted out on the casting for the labyrinth seal. i will have to do a spring tension cap on the other end after thinking about it since i'm getting closer to that part. still have a bunch to do but  at least now i can see how it will look when i'm done,

     

i cut my day short yesterday since my foot was hurting but felt pretty good today so i wanted to get something done today before going back into work tonight. i got the end work on the shaft finished and made the cap to hold the compressed spring in place so all is good. i ended up cutting some slight clearance on the bottom of  the cap because i did not account for the bolts sticking up on the taper lock pulley. got that sorted out and since the draw bar was in place i checked the travel needed for the ejection stroke of the draw bar. what i noticed was the stroke was long so i will be reworking the ID of the shaft again

i have the spring travel as is but the extra ejection length takes away from the actual holding force in the end. so the shorter the ejection stroke the better. it stinks i have to rework it again but it's better to catch it now before any bearings are in place so that part is a plus at the very least.

one other thing i will add is a threaded cap to the end of the draw bar so when the air cylinder does the ejecting it's not  messing the treads up on the end of the draw bar. once i get the ejection stroke length nailed down i can shorten the end of the draw bar. i made it longer so i could sort this out later      

needed some tubing for bearing spaces for this project and all i have to say is WOW prices are crazy right now. almost $ 100 for 2 different12" lengths. these material prices in the current market suck.

i have been waiting for 3 weeks for some DOM tube so i can make outer race spacers and this material still has not shipped yet? prices are a bit out of control on tube and everything else for that matter but it is what it is i guess.

i do have enough finished that i can sort the motor mounting and everything else. this is still in the rough design phase and i still have a few things to sort out but the major stuff i think i have sorted out and did a screen grab to post for the basic plan.

since i would like to do rigid tapping this 3 phase motor needs some feed back so coming up with a way to get an encoder on the motor was a bit of a thinking process but i think i have a good plan, the motor has a plastic fan for cooling on the back side of the shaft so the plan is to attach an encoder directly to the shaft and loose the plastic fan altogether. these motors cool ok at high speeds but when you run slower the cooling drops off. so to make it better at all speeds the plan is to heatsink the motor and use 2 DC fans to cool everything. most likely they will just run all the time when the machine is running.

i have a simple belt tension system worked out and now know what length of belt i need. the one belt i have is too short but getting one that will work is not a problem.

this is still a work in progress but the screen grab explains things better than i can i think image missing https://www.cnczone.com/forums/images/smilies/smile.gif