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| My Harrison Lathe.....Restoration?? |
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| John Stevenson:
--- Quote from: Bernd on December 08, 2008, 10:03:27 PM --- --- Quote from: Darren on December 08, 2008, 07:19:36 PM ---More luck than skill...more to come soon, a mig followed me home today..... :) --- End quote --- What? A Russian jet. :jaw: Wow. :D :D :D Bernd P.S. Sorry I couldn't resist that. :hammer: :wack: --- End quote --- Wait until you see the ground cart needed to start it ::) . |
| Darren:
Decided to have a look at the front head bearing tonight. It feels in great condition and turns freely. Once the front cover was removed it was nice to see the bearing packed with grease and had not been run dry. Was equally as nice not to see the area full of rust. It looks old but has not hardened, all the same I decided to replace it. I had no desire to remove the bearing for fear of causing any possible damage. Besides, there was no reason to take it out. On top of the bearing housing is a grease cup for adding lube. For those that may not know the idea is quite simple. you pack the cup with grease and thread it back onto the housing. Only a couple of threads mind you. Over time you tighten it up by a couple of turns every so often. This forces grease right into the bearing itself. When fully tightened down you undo the cap and remove it, fill it with more grease and start the process again. It's quite an effective method. In my case for this time around, I filled it several times, thereby forcing the old grease out and totally renewing it. I used Lithium Molly grease here as it was all I had to hand. Good enough for car CV joints it'll be great in this application. Here's a picture of part of the leadscrew dog clutch. This is forced in and out of the mating part to start/stop the leadscrew from turning whilst leaving the lathe itself running if desired. Whilst quite a crude and brutal method, it's great for threading as there is no need for a thread dial indicator. You will always engage in the correct position with one of these. But a point to note is the total lack of wear. It's mating part not shown here is in the same condition. I would have done a bit more today but I've been playing with this. Well I had to test it didn't I..!! Alas I have no mask, need some wire and it needs a new tip as it's missing. But it seems to work fine and it's had a new gun fitted....hurray..I'll have fun with this :D |
| Darren:
Tonight I decided to have another look at the Union lathe. old-biker-uk, (Mark who makes those fascinating coins) was kind enough to offer me a motor mount with built in belt tensioner facilities. Very generous of you Mark and extremely helpful to the cause. :thumbup: The bronze bearings look to be in good condition and accept a 3/4" (19mm) pulley shaft. Here I've fitted a steel bar in my initial sort out of what I'm going to do with this lot. I need to fit these two pulleys on the shaft, neither has the right sized bore....of course not, why would they....more excuses to turn on the lathe :ddb: :ddb: :ddb: For the 3 step cone pulley I decided to make a sleeve, uh, only got a drive shaft to make it from :lol: :lol: :lol: But, I'm not going to drill or tap it this time, just reduce the outer diameter and bore it. Learning from my past mistakes I'm using the abrasive cut-off saw this time around, the bandsaw blades last a wee bit longer this way :dremel: Turned the outer diameter to a little over sized to be finished later. Here I'm drilling the center out to 19mm to fit the shaft. Incidentally this is the first time for me to try my new keyless chuck. If you are still using a keyed chuck, do yourself a favour, throw it in the bin and get one of these. They are brill to use, no straining to get it tight enough, it self tightens under the drilling pressure, all you need to do is nip it up by hand first. Very quick to use esp as you don't have to hunt for the key first :scratch: The drilling with a 19mm bit is only possible after doing Bog's tailstock arbour mod along with me fitting the flat car fan belt. Totally transformed this lathe.... :ddb: Boring out the 6" pulley to 19mm This is the sleeve on the shaft, I will weld this together tomorrow, hence the chamfers for the weld bead. When that is done I will turn the sleeve to it's final diameter so that it's true to the shaft. A few shots of the mock set-up |
| sbwhart:
That lathes coming on a treat Darren your making good use of that motor mount I think you'll soon have a runner. :beer: Stew |
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