mega arc 5040dd
Aluminum
- Joined
- Apr 17, 2012
- Location
- Saskatchewan, Canada
I have what I believe to be a MacGregor Gourlay lathe and am having trouble identifying the tapers in the headstock and tail stock. I tested two centers in the tail stock and they both seemed to fit right one is a newer one and one is a very old one that either came with this lathe or a barnes 13 I used to have. I then measure both centers. The new one is an MT2 and the old one I believe is an MT2 but could just as easily be a jarno taper and thats where my problems begin.
Form what I can tell from my machineries handbook 6th edition jarno and MT2 are only .002" per foot different. I have no way to measure the taper accurately enough to be able to tell the difference. That brings me to my first question can a MT2 center or drill be used in a jarno taper since they are that close? If not would I be able to tell for sure if the tail stock was a jarno taper just by trying an MT2 center in it.
My next question is the head stock. I thought that if i measured the dead center that came with the lathe it would tell me if the taper is MT or jarno and then answer my question about the tail stock. When I measured it I got roughly .519" taper per foot. That doesn't match taper i could find in machineries handbook 6th or 29th editions. I am aware that it could be a random taper that the manufacturer just decided on and since I have a center for it it doesn't really matter but thought I would as if anyone knows what it is.
Any advice would be a big help this is one of the last things I have left to figure out on this lathe before it is ready to make chips finally.
Form what I can tell from my machineries handbook 6th edition jarno and MT2 are only .002" per foot different. I have no way to measure the taper accurately enough to be able to tell the difference. That brings me to my first question can a MT2 center or drill be used in a jarno taper since they are that close? If not would I be able to tell for sure if the tail stock was a jarno taper just by trying an MT2 center in it.
My next question is the head stock. I thought that if i measured the dead center that came with the lathe it would tell me if the taper is MT or jarno and then answer my question about the tail stock. When I measured it I got roughly .519" taper per foot. That doesn't match taper i could find in machineries handbook 6th or 29th editions. I am aware that it could be a random taper that the manufacturer just decided on and since I have a center for it it doesn't really matter but thought I would as if anyone knows what it is.
Any advice would be a big help this is one of the last things I have left to figure out on this lathe before it is ready to make chips finally.