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Harrison L5 rescue

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micktoon:
  Bill I have just thought why the milled part might be there, the small thin chip guard at the front of the cross slide will hit the nut and stop travel I think  when the cross slide comes back towards the handwheel, so this gap will let the cross slide reach the hand wheel end at full travel ?
  Mick

BillTodd:
That's great Mick. Thanks :)

It confirms that the step is required (I thought it might be a backlash reducing bodge ) .

I'm fairly sure this one is an original nut : it's a crudely fettled casting. Both it and the screw are marked with a figure two. Interestingly, this one was spaced down by a small stack of shims - I guess that, when new, it had less than the 60 thou" backlash !

Thanks again for the pictures. If you need any of this one, let me know .

Bill

Ned Ludd:
Hi Mick,
I'm sure with all your equipment you don't need to be told that a 3Ph motor runs much more quietly and smoothly on a VFD than a phase converter. That and speed control makes it a no-contest situation in my view.
Ned

micktoon:
 Hi Ned , I know what you mean and you are right, just sometimes in hindsight it might have saved a lot of hassle just leaving things three phase, switches , suds pumps , lamps etc and just plug whatever you want to use into a converter........ instead of a project per machine and then next time you go to use it the inverter has gone US  :palm:, as has happened with both the Bridgeport inverters , one for the table and one for the spindle, sometimes it just feels a bit like  :bang: ha ha .

 Mick

lordedmond:

--- Quote from: AdeV on July 09, 2012, 03:47:30 AM ---Nice rescue of a nice lathe Mick. I've always had a soft spot for the L5, I nearly scored one a while back, before ending up with the Edgwick.


--- Quote from: micktoon on July 09, 2012, 03:17:36 AM ---and reversing for threading, I know its a screwed on chuck so a bit iffy but having said that how much force is needed for taking off the chuck I think you would have to be doing something daft to get it to come free.

--- End quote ---

The big danger, as I understand it, is if you do an emergency stop from a high reverse speed: The lathe stops, but the chuck doesn't... That shouldn't be a problem when threading, as you won't be doing high speed.

--- End quote ---

Ade

wrong way round

if the spindle is rotating in the normal forwards direction and you stop the spindle ( by what ever means ) the chuck ail continue to rotate in a anticlockwise rotation ( looking up the spout ) thus unscrew ( dont ask how I know )  when you are in reverse and stop the spindle it will tighten it up

You have to consider the spindle not the chuck  stop the spindle and the chuck will tend to try and continue in the same direction

Stuart

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