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| tomrux:
hey people how do i calculate how far over to push the tail stock to cut a morse taper. TIA Tom |
| BillTodd:
Tapers, Morse and most other imperial ones, are specified in inches per foot (or per inch) on diameter . All you need to do is turn the work parallel, then measure two points at precisely 2.0000" or 3.0000" apart and adjust the tail stock over the correct amount. e.g. 2.0000 x 0.04995" /2 = 0.04995 for an mt2. (Yes, they really are specified to 5 decimal places) Mt1 = 0.04988 "/" mt2 = 0.04995 mt3 = 0.05019 Bill |
| tomrux:
sort of thought morse taper was same angle just larger for the different sizes ??????? kind of lost here. trying to turn an adapter to hold and centre a chuck to an rt. tom |
| Bogstandard:
If you are not really into fine machining, you might be causing yourself a bucketload of trouble by offsetting your tailstock, as it will need to be put back to spot on after you have finished, and that can be a big job in itself. I don't know which lathe you have, but if you can get a long enough cut on your topslide, say 3" to 3.5" then it might be easier to do it that way. The first part of this post shows an easy way to cut a taper to match one you already have (forget the grinding part). http://madmodder.net/index.php?topic=1993.0 I usually keep in stock a few blank end arbors to do the sorts of thing you are attempting, they are rather cheap and save all the hassle of cutting the tapers. I know you are from the Antipodes, but if you can source them over there, it will save you a lot of time and money. This is what I am on about. http://www.arceurotrade.co.uk/Catalogue/Blank-End-Arbors Bogs |
| Chuck in E. TN:
Tomrux, I just made such an adapter for my Vertex RT. I turned an MT2 taper on my Micromark 7x14 without offsetting the tailstock. It was tight, and I had to make the tapered cut in stages. I checked progress with an MT3 to MT2 sleeve, until the taper was as long as I needed. I did not measure anything while turning the actual taper. I set up the topslide angle by chucking my tailstock drill chuck in my 4 jaw by its nose and used a dti to adjust the angle for zero deflection when moving the topslide. Pictures of the completed taper here: The lathe is still set up as I want to make another, I could take more pictures if you like. |
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