Member postings for Bodger Brian

Thanks one & all....

The reason I ask is that I've seen a Sigma Jones Jig Borer for sale at what sounds like a reasonable price and wondered if it would be a good addition to my man-cave for light milling.

Brian

Hopefully a simple question....

What's the difference between a jig borer & a milling machine? As far as I can tell, jig borers seem to have an integral rotary table but apart from that?

Or is the clue in the word 'borer'?

Brian

I don't know about 'killed' but my wife works for Oxford University Press and tells me that they're having to remove & replace Flash from all of their electronic publishing as Adobe are no longer supporting it.

Brian

My immediate thought was that a PCB manufacturer might be able to silkscreen the text for you (small text size wouldn't be an issue) but I would imagine that it might be a struggle to find one that would be willing to do a one-off without the cost being prohibitive.

Brian

Can you clarify what you mean by "having difficulty getting power to the magnet coils"?

Brian

I was recently thinking about scales used in model engineering & one thing was puzzling me.

Why are road steam models (traction engines etc) defined as being in a scale of 2in, 3in, or 4in, for instance? A scale is a ratio, so why not 1:6, 1:4 or 1:3? I know now that it refers to 2in:1ft etc but when I first started being interested in model engineering it took me a very long time to work that one out.

As far as I'm aware, the only other branch of modelling that does this is the world of figurines (albeit in metric form).

Can anyone explain why?

Brian

Lots of food for thought here but I think the best advice was from Not Done Yet - stop turning in circles & do it.

If I'm honest with myself, I can't see me ever needing to cut imperial threads but if I do, I can either re-fit the original leadscrew or follow Neil's suggestion & buy a 63 tooth gear.

One last question; along with the metric leadscrew etc, I have a replacement sticker showing the change gear combinations for various pitches but I don't have a metric version of this....

Assuming that one is necessary can someone kindly either provide the figures or point me in the direction of a suitable image on the internet?

Thanks

Brian

I might be missing something obvious here but won't glance at the dial indicator tell you? 10 divisions, metric - 8 divisions, imperial?

Brian

My wallet is still hurting from buying the Cowells!

Brian

'Larger jobs' was just a hypothetical situation where a workpiece might be just that little too big to be accommodated on the Cowells.

You're probably right - I might be over-thinking this.

Brian

When I bought my mini-lathe many moons ago, I wanted one with a metric leadscrew but only imperial versions were in stock at the time. Being the impatient type that I am, rather than wait I bought imperial but also purchased a metric leadscrew, half nuts & dial indicator, intending to swap them round but of course never did.

In the course of stripping & cleaning the lathe recently I realised that it would be ideal time to do the deed.

BUT...... I've also recently purchased a Cowells lathe, enabling me to cut metric threads if I need to, so why bother changing the mini-lathe?

BUT..... the Cowells has a smaller capacity, so I might need the mini-lathe for screw cutting on larger metric jobs.

BUT....... I don't think I'll ever feel the need to cut an imperial thread but if I do, I don't want the hassle of changing the leadscrew back again.

BUT.... I keep going round in circles!

What would you do in my situation?

(I should add that I'm aware that imperial threads can be cut on a metric lathe & vice versa but I don't want to faff about with odd combinations of change wheels)

Brian

Edited By Bodger Brian on 06/10/2016 22:01:25

Thanks chaps - it all seems to confirm what I thought.

I must bookmark the littlemachineshop link, as my original manual (long since lost) was written in bad 'Chinglish' & didn't have anywhere near the same amount of information.

Just as an aside, there are a couple of grubscrews in the top of the saddle. First of all I thought they might have been covering lubrication points but when I removed them, the holes appeared to be blind. My only other idea is that they're fixing points for some attachment. Can anyone confirm or deny that?

Brian

I've stripped my ageing Chinese mini-lathe, prior to cleaning after a long period of non-use, and want to be sure that I understand the purposes of the screws in the gib-strips on the underside of the saddle before I re-assemble it.

Am I right in assuming that the adjustment is made as normal with the grubscrews/locking nuts and that the socket headed screws are merely for location purposes & as such the latter should be only be tightened sufficiently to hold the strips in place?

Brian

Posted by pgk pgk on 30/09/2016 10:23:03:

Hang a bucket of sheep nuts from somewhere...

I hope you're talking animal foodstuff & not anatomy!

Brian

I may be talking a load of c**p but I recall reading somewhere that in order to be classed as an agricultural vehicle for road tax purposes, it had to be possible to demonstrate that the vehicle in question was capable of agricultural work. I suppose if you managed to hitch a plough to it....

Brian

Thanks Jason - I sort of suspected that was what the figures meant but I didn't want to assume..

Brian

Could some kind soul translate for me please?

Thanks - Brian

That's only true if you're used to using fractions. Presented with a bunch of them, I'd have to reach for a pencil & paper.

Brian

It's in the sub-heading - Myford ML1

Brian

Edited By Bodger Brian on 27/08/2016 17:26:05

Edited By Bodger Brian on 27/08/2016 17:26:27

How do I get rid of the emoji? I think I read something recently that it's due to the combination of characters but I can't find the post.

Brian