| Gallery, Projects and General > Project Logs |
| A very short (JT2) project |
| (1/3) > >> |
| jcs0001:
My lathe has an MT4 headstock spindle taper and an MT3 tailstock taper. I have an offshore chuck on an MT3 arbor for the tailstock and it works quite well. However I have another chuck, an Almond that I picked up some time ago when I purchased another lathe. It is a beautiful old chuck mounted on an MT2 arbor. Unfortunately I have to use an MT3 to MT2 adapter to mount it in the tailstock and it projects quite a bit more than it should. The extra projection is about 20 mm more than the other chuck. The Almond chuck sits on a JT2 taper so what I really need is a MT3/JT2 arbor. I have looked at Busy Bee tools and a local shop however neither carry such an arbor. I can find them on ebay however with shipping about double the fairly high price of the arbor - I don't need it that bad. My plan is this: - order an MT4 to MT3 or a MT4 to MT2 adapter. - order an MT3 arbor with a soft steel (the JT2 end). The MT3 part is hardened. (the mt adapters will always be handy so not a waste) Place the old MT2 arbor into the spindle of the lathe using one or two adapters to size it up. Align the compound using the existing JT2 taper, replace it with the arbor blank and machine to a JT2 taper. It looks like photo bucket is still down so I will put up a few photos once it is up and running. One question I have is regarding the soft steel that I will make my JT2 taper from - will it be ok to leave it that way? I have hardened drill rod and other high carbon steel so am not a total novice at that. I have several small propane/MAP gas torches and it's likely I can heat the end of the arbor red hot however I have no idea if it needs to be plunged into water, oil, blood or other body fluids :D If I attempt to harden it there may be less than favourable effects on the MT3 portion - any ideas appreciated. Thanks for reading, John. |
| seadog:
I'd leave it as is John. You'll introduce distortion to the arbor if you try hardening and tempering requiring a grinder to clean up the tapers. Usually the steel is tough and suitable for use as is. I made a parallel/JT33 arbor from silver steel for an Albrecht chuck and haven't had any problems with it. |
| chipenter:
The tapers are a diferent angle not mutch but enugh , I have reduced a sleeves with a tiped tool for my mill , press the sleeve on to a centre and mount between centres , clock on the sleeve and turn down light cuts and finish with a stone . |
| RobWilson:
:worthless: John ! Rob :D |
| jcs0001:
Here are the photos - I suspect Rob won't sleep without them :) The two drill chucks, Almond in the back: I could cut the end off the MT3 adapter and that would have the chuck further back in the tailstock however that isn't very elegant and I would prefer to get rid of the adapter in this application. The import in the tailstock as far back as it will go before being released: Almond chuck in the tailstock - back as far as it will go before being released: Almond chuck with blank MT3 arbour (soft end next to it): Thank you Seadog and Chipenter for your advice. I will likely leave it as is (unhardened). Will need to work on my lathe tool sharpening skills to get a good finish. Maybe time to make a "poor man's tool post grinder" with my dremel. I need to order a few items to complete this so it will be a couple of weeks before I can post a photo or two of the finished product (disaster). John. |
| Navigation |
| Message Index |
| Next page |