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Member postings for Graeme Whitfield

Here is a list of all the postings Graeme Whitfield has made in our forums. Click on a thread name to jump to the thread.

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Thread: making new lathe spindle
24/02/2015 15:55:48
Been to see a few pro's, they all said boring it isnt a good idea. They all said just grind, plate and re grind the spindle. Been quoted ?115-?130 from one company an ive another to go see. No one seems to think sleeving the spindle is a good idea either.
23/02/2015 23:30:15

Cant add a link, but bicycle ones in 40mm internal are only 52mm external and 7mm wide.

23/02/2015 23:02:16

Here is the spindle, its just the larger area that is worn.

Options are, try and make a new one.

Get it ground and plated.

Get it turned down and sleeved.

I have no idea, but my gut feeling is sleeved would be cheaper to get done than plated?20150223_152804.jpg

23/02/2015 22:54:24
I looked earlier and normal 1" imternal are all near 2" external. I did briefly look at cycle headsets. The tapers in them are tiny and 1" in a steerer dimension.
Motorcycle ones are standard, I have them in all my motorbikes.

I thought cycle ones might be too light duty though but maybe not if they dont need much preload.

Might be easier all round to just fix this spindle though.

Edited By Graeme Whitfield on 23/02/2015 22:55:12

23/02/2015 22:50:10
Ill be honest, I skimmed the link, but seems very little preload needed on taper bearing then.

23/02/2015 22:29:38
Ahhh, im an idiot. Journal is worn to 0.993, giving me the play.

So the spindle is worn more than the bore.
Interesting, maybe just finding someone to plate/grind or sleeve the spindle is the way forward? also means making a new spindle is viable again. Nothing to loose in trying I guess. For a beginner I guess the through bore and taper will be the hard part.

Edited By Graeme Whitfield on 23/02/2015 22:35:11

23/02/2015 22:27:22
I cant measure much wear in the bore. Trying to measure the bore using digital calipers I get 0.998". Thats with the adjusting nut slack. Using internal calipers to feel drag I cant detect any difference in bore diameter anywhere.

There must be though as thats only 0.002" clearance, allow a bit of claming down with the adjuster and that should be well in spec for oil clearance in plain bearing. However, I can easily see/feel lift in chuck and have measured 0.12mm lift with my dti.

(Sorry for switching from imperial to metric)
23/02/2015 22:16:46
Spindle is 0.996" but at bearing journal is worn down to 0.993" housing is 1.156" wide. The thrust area bit that looks like a bearing sticking out is 1.660" diameter.
23/02/2015 22:09:15
Good point blowlamp, I could probably rig something up to see how much pressure it takes to start closing that gap. As for boring, id have the headstock apart so couldnt power any cutting tools.
23/02/2015 22:06:29
There is no bearing in the casting, tje spindle runs in the iron. Its shaped so it looks like a bearing but there isnt.
23/02/2015 21:51:21
Michael, what dimensions are needed, ill go measure it.
23/02/2015 21:50:13
They are pretty. I was looking for a good one of these for ages. Got lucky with this one really. Not all original but modified over the years by someone who knew what they were doind.
Thread: £1 3 issue offer
23/02/2015 19:13:25

Thanks.

Thread: making new lathe spindle
23/02/2015 19:11:22

Hang on, took a while to click, do you mean convert the front bearing to a taper roller bearing?

Hmmm, i wonder if there is room...20150223_152725.jpg

23/02/2015 19:08:12

I went through the mega adept thread last week, ive browsed the forum quite a bit before i joined.

Ill get the wife to pick me up a copy of the magazine, she goes through town every day.

It is a machine that will be used, but only lightly as i dont often need to turn much. i guess that will change as i get used to having a lathe about though.

Thread: £1 3 issue offer
23/02/2015 19:00:39

I found the 3 issues for £1 subscription offer but its not mentioned on this site.

Is this legit?

Also, i cant just pay for it, it wants me to set up a direct debit? Whats the deal with this, do i then have to make sure i cancel otherwise it carries on with normal full rate subscription?

Thanks.

Thread: making new lathe spindle
23/02/2015 18:41:05

Just seeing if this works.20150118_152829.jpg

23/02/2015 18:40:14

Ok, so i worked out how to add a pic, but not how to put text as well!

Anyhow, getting sidetracked, anyone recognise these parts? Certainly not original.

Getting even more sidetracked, i knew about model engineer magazine but (dont tell anyone) i dont have much interest in trains.

I have just clicked the link at the top about model engineer workshop magazine and it looks like the best thing ever!

Subscription only or is it carried in any shops?

23/02/2015 18:37:00

20150119_204607.jpg

23/02/2015 18:22:02
Yes, it has a tiny bore and a mt1 taper.
I have considered, if making a spindle, seeing how much bigger I could go. I could increase diamater a fair bit, get a bigger bore, bigger nose thread and taper. Only limit is meat around the bearings and how far I could bore the pulley. I have 3 or 4 faceplates, one with lots of tapped holes, looks like a dividing plate but isnt, 2 faceplate chucks, a nice 4 jaw and a lovely 3 jaw so id need to bore and re thread all those too.
Still, could be a good opertunity to upgrade it.

Its been reground in its life, has new leadscrews and nuts and has been modified to fit a proper cross slide and top slide. I also have a traveling and fixed steady so on the whole, although its old and not all that stiff, its worth getting it sorted.

In fact, ill add a pic of the cross slide to my album (I cant put it in the thread from my phone). If anyone wants to see if they know what its from, no one seems to recognise it. Looks very 'britannia' to me.

Edited By Graeme Whitfield on 23/02/2015 18:28:27

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