Are the vertical versions more susceptible to vibration than the horizontal types.

Likely not much difference. Have you considered shock mounting the motor?

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i hadnt good idea.... as you can visibly see the mounting plate bouncing up and down

There are manybreasons for vibration. Start with the low hanging fruit of belts, shafts, and bearings. Maybe it is something easy to fix, without much expense and effort.

@Jon,? im fairly happy about the big pulley.? my friend made a mandrel up and put it in his mill.? there was 10ths of a thou of run out as best as we could tell.? I dont have a way of testing the physical shaft.

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@Greg The motor that came with mine isnt the original however its a decent british make.? The issue is that if i just sit the motor on the bench with no belt i can feel slight vibration in the bench.? So the motor does vibrate,? whether or not it still would if clamped solidly to the bench is another matter and whether or not that is accounting for all the vibration i have no idea.? The motor doesnt fit on the motor mount so someone has made up a 1/2" thick plate bolted to the motor mount with the motor bolted to that.? Having measured the mounting holes on the lathe bracket they dont seem to match any modern standard its a little tricky to know where to measure from.

@Andreli The headstock bearings are ok as far as i can check them.? i have very little run out on the spindle nose.? I suppose the thing to do is check the run out on the countershaft the same way.

Yes, that is what I meant. Those bearings and shaft and then motor. Also, the belt may generate some vibrations if it has a bend in it. Old, hardened belts may do that

Get

The washing machine motor on mine gave up the ghost some years ago. When looking fo a replacement I found a motor and VFD pair from Automation Direct that was just a little more than a new single phase motor, so I splurged.? Best thing I ever did for the old lathe.? Leveling with a machinist level was second.? Link-a-belt (?) With the old motor was also a very good change.??

Single phase motors, by their nature will have some vibration.? Ballancing might help (??).? As long as the motor shaft isn't? bent, its probably as good as you get.??

I agree with Andrei, easy, cheap first.? If you don't have a link-belt, easy thing to try and it really helped mine, when you get around to making changes.

You may also want to mount the motor. No belts and see what it does.? Resonance can be a funny and poweful thing.? If vibration is much worse than on the bench, add or subtract some weight from the motor mount assembly and retry.? I doubt there will be much difference, but easy to check.

Greg

ok a little bit of progress..? I discovered that the big stud (10-112) at the bottom of the whole motor and counter shaft carrier the outer nut was about 1/4" away from the frame allowing the whole thing to move. That has been tightened so it is against the frame where the frame seems to want to sit. ?

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I put the motor on the mount with no belt and there is very slight vibration in the bed of the lathe but im sure some rubber feet will sort that.? Next i was going to just put the belt from the motor to the counter shaft however tightening that bottom bolt has moved the motor position and the belt is looser than a hookers knickers so new belt needed again before i can move on to the next bit but progress made. ? ?