Member postings for Bazyle

Don't worry, you don't need the rotating bed for that, just move the vice or whatever over at an angle. And you don't need a dividing head to make the repair piece. After silver soldering in a repair piece (remember to heat all the gear not just locally to avoid stress) you can mount the gear and with a detent in its one of its own teeth to align the cutter with an existing tooth. Then index off the teeth.

I'm sure there are dozens of those galvanometers around schools and universities. Not impressed by the number of photos like only one angle on the first and no inside view of the chest.
I think the first item is a kill jar for bugs. A bell jar goes over the flat area, the dual action pump tries to suffocate them and the funnel can be used to introduce eg chloroform.

My sister lives near RHS and is a member so will be able to line up a visit when the new display opens.

Edited By Bazyle on 29/12/2021 15:22:45

As I don't get a newspaper I find these come in handy, and I get them in pairs owing to some house naming mix up. Delivered free too.

For lighting the woodburner of course, what were you thinking.

You ought to look at a small rotary table designed to mount on its side first as it will provide you with dual function. Lots of them have dividing plate kit available.
Only progress to a dividing head when you are making enough gears to warrant it. Decide if you need one that tilts (semi-universal). Another variable is the taper, which of MT2 or MT3 etc might be more useful to you.

Quite a few smaller ones that don't tilt around including a couple of ME designs (Sparey, George T) for which castings are available. Also possible to DIY based on old headstock, old tailstock, spin indexer etc. So many options the problem is deciding which way to go.

Another variable is the nose thread if it doesn't come with a chuck fitted. The early BS0 from 'chindia' may have copied the original Browne and Sharpe thread but somewhere along the line it occurred to a UK importer to offer a Myford compatible thread for a bit extra. So they could be something different, including 55 or 60 degree thread even if the right tpi,

Before plumeping for a BS0 I suggest making a cardboard mock up to see how it fits, there must be dimensions on the net somwhere.

A fully universal enables you to index primes but nowadays you can just as easily 3d print a custom plate to enable you to do that on a plain head (see Thingiverse for a plate design you can customise)

The harder the steel the better it is at retaining magnetism. The best iron for the job is pure iron, like genuine wrought or puddled iron from days gone by. (not the modern 'wrought' iron from blacksmiths which is just mild steel). You might find a bit in an architectural recycling salvage yard where they have a bit of Victorian ironwork that is going to be cut off and is too small for anything else.

With lots of old electronic items being scrapped there are transformers in them that might be useable. Transformer laminations are specially made from pure iron but with silicon added to increase its resistance to heat generating eddy currents in AC applications. Unfortunately for the same reason (eddy currents) that is why they are made from lots of thin bits insulated from one another.

Hey didn't all you guys do this in 'O' level physics like I did?.

I thought the idea of a rear toolpost for parting off was to mount the tool upside down and running normal direction so the carriage lifts instead of digging in.

On a small lathe the carbide tools are all too wide needing extra power and wasting metal. I mostly use a 1mm width blade on model engineering sized stuff and on thicker bits like 3/4 inch start it off to set the line and finish with a hacksaw. No point in risking a mess just to boast how you part off bits of 2in EN24 at 15000rpm.

Roger, if you cannot find a model engineer type from your local club who can help you need an industrial electrician not a domestic electrician and not a lathe servicer unless by chance they know a bit about electrics, Don't even think about levelling until you are not an absolute beginner, it just doesn't matter that much for most things.

"AUD training lathe" ? Check out Lathes.co.uk to see which one you have (who also do some spares). Backlash isn't really a problem as you can compensate. There are lots of spares popping up on ebay but don't rush in until you have done a bit of playing around to get to know it and lathework better. There are also other sources if you google images for 'Boxford Lathe Spares' you will see parts lists and several companies dealing in parts.

Good on your wife. It's Sunday too. Shouldn't do noisy stuff or hang out washing on a Sunday. It's against bylaws in some sensible parts of Germany. Even worse is the oiks in little planes that want to fly their noise machines over my garden in the summer when I want to sit peacefully reading Model Engineer.

Meanwhile I liked your little Dickensian commentary Nigel.

I thought MG's title for the thread and original content was rather clever. Can't comment on the BBC repeats as I have no TV in the house. Just watch youtube if I feel the need for moving pictures and it has the great advantage that when it becomes apparent that they are going to drone on for half an hour to show the drilling of 6 holes in excruciating detail you can just move on. How is it that these incredibly boring videos actually get comments like 'Great video Fred'. Do the commenters have such boring lives that this is actually entertaining,

Happy Festivities from St Albans DMES

Do you absolutely have to do this at this time, with your level of experience? Is it missing off your lathe? If it is just about backlash have you bought a new nut? It is quite a difficult item to make, let alone make well and a lot of the people on the forum would work hard to avoid such a task.

There is a model engineering club at a nice community centre sort of at the bottom left hand edge of the town. Is that were you got your lathe? They have a track too that was extended about 20 years ago using the track from St Albans when we were pushed off our old site.

To add to Thor's links above search this site for 'Dads engines' .

but note the half nut lever is on the left, see earlier comments.

The combination is used together all the time in more critical applications like cylinder and piston without problems. You could calculate the difference in expansion if you use enough decimal places but it's an area where you wouldn't be making things (the studs joining them) that tight a for it to matter.

As it probably has an Int40 spindle and 3HP motor there is plenty of room to make a concentric light weight speed doubler or even an ultra high speed spindle mounted in the spindle and driven down the drawbar hole.

Before you just multiply the (non -boiler) parts by 1.5 check whether the scale of the bodywork is actually the same as the scale of the wheel space relative to full size. 5in models are often scaled as 1in = 1 ft but obviously the wheels aren't.

No I was referring to hydraulic oil as used in JCBs etc. but was perhaps a bit glib as I was just trying to emphasise that you want a thicker oil to stay in place. Hydraulic oil is thin so it can be pumped easily and fast to move pistons and provide cooling and is way too thin to use for bearings. A few lathes, normally industrial types, with gearheads also have an oil pump so need to be able to pump the oil but most hobby lathes aren't like that. Also automatic gearbox oil is too thin because it too is intended to be pumped for cooling and to move the gear change pistons.

It is 'cos you left it in too long. Although different steels and cast iron all behave slightly differently. It is just oxide or phosphate I'm not sure which. You should be able to clean it off with a bit of vinegar left over from your Christmas pickled onions/beetroot.

BEWARE

Even as I was posting above the GPO was silently delivering my parcel for real in the time window the text said. Unexpected present from nephew. But the texts I was getting with a link to ryml.me the GPO themselves say is a scam (smishing). So this means the GPO system has been hacked so the scammers can smish people who are expecting a delivery.