Member postings for John Stevenson

Looks as though it has been setup as a lathe ?

Murray,

Don't know about anyone else but I can't read blogs that work bottom up.

You would think by now that some enterprising web publisher would have come up with a top down format.

Keep jumping up and down to look at pictures and then read the text is like pulling teeth.

Only one thing is worse and that's a blog with wobbly video.

Good job you can't see what's actually holding the disk on.

It's three M10 nuts welded to the soft jaws and machined back. Saves wasting a set of soft jaws, I can grind these off and replace them with other bits of metal

Clumsy bastard.......

Was going to put this in the "What did you do today" post but decided it would do better here.

THIS IS A WASHER.

16" diameter with 7" hole being trepanned out, 30 mm deep.

Tool is approximately 6mm wide x 12mm deep. 250 rpm, power feed set at "steady as she goes"

I don't know what the feeds are on this machine as all the number have worn off the feed plate.

Now that bit IS worth saving.

Amuses me when you read the label on a bottle of water and it says "Still Water"

3 weeks later it's still water ??

Why go to the trouble of trepanning the corners ?

You will have 4 interrupted cuts every rev getting an 80mm circle out of an 80mm square plate and just to save 4 tiny triangular bits of steel that will never get used again ?

So for saving 4 silly corner chances are you break a trepanning tool or rip it out of the chuck and you have to start again.

Years ago before plasma cutters and laser cutters which would have made life so easy I made a barrel for an early racing Motobecane 250. OHC with face cams.

This was an iron barrel but very close finned, I had no barrel, just pictures but the foundry was shy of trying to do one given the close fins.

I finished up cutting each fin out of sheet steel, probably 4mm and feathering the fins off with an angle grinder and sander.

Starting from the bottom I welded the fin onto a steel tube with a fair amount of weld which was then turned to a root fillet and faced off ready for the next fin to sit on. Second fin was welded into place and so on.

It was a pain feathering the fins off but it meant I could keep the unique outer shape of each fin very easily and there was a lot of variation in size from top to bottom both in size and outer shape.

The lower fins were more circular but the upper fins more square and they had the bevel tube inside the fins and not just a cutout.

When all welded, blasted and painted it looked awesome

Splines are a generic term.

Are they straight sided or involute [ curved ]

If straight then the angle between them is 360 divided by the number of splines.

If involute then they usually have a designation like 10/20 where the DP is 10 but they are cut to 20dp depth.

Loads of 1/4" olives on Ebay from singles to 1000 off

Don't bother.

Far, far cheaper to replace the motor than have it rewound. Anything below 15Kw is now cheaper to replace.

If you have single phase motor problems then look to replacing it with a 3 phase motor and Inverter [ VFD ] you will never look back.

Can't you just hold your breath for a bit ?

Dunno but from a point of having something like this buried in a What did you do post I feel it would be better moved  to a dedicated post and added to by Muzzer for anyone wanting to tread the same or similar path later ?

Edited By John Stevenson on 30/03/2017 12:36:06

Ask yourself, "Why do I need all this compressed air when I don't have any at the moment ?"

Buy cheap, buy twice.

I do so wish some of the other posters on here will take heed of Joe's words.

To say that a lot of the members here can make such marvelous models and jobs the fact that the tripod was invented at least 400 years ago seems to escape them.

Edited By John Stevenson on 26/03/2017 16:57:06

Wrong crack Neil.

I meant this one.

Edited By John Stevenson on 24/03/2017 01:27:56

It was part of the rise and fall mechanism off one of the crack detecting machines.