Member postings for Phil P

You could do something like this which I made for my own machine. It adapts a Pultra clock-makers lathe head and tail stock to use for small dividing jobs.

Phil

Peter

Is that done using the "Wheatstone Bridge" principle that we learned about in school all those years ago.

Phil

You might just have something of value to a collector there.

I once bought an unusual micrometer at an antiques fair for £20, and sold it on ebay to a collector in America for £2600 !!

I wish I could find another one like it, but apparently mine was one of only two known to exist.

Phil

I have started using "Stellite" tool bits in my tangential toolholders. Much more resistant to heat and wear than any HSS I had been using previously. I did try the Crobalt and that seemed OK, but then found some 1/4" square Stellite.

They turn up from time to time on a well known online auction site.

Phil

So it was pilot error rather than an actual problem with the tooling then. I am curious what the "alternative solution" was though.

I use these tools on both my lathes and find they are very easy to set up, and do exactly as promised.

One thing I learnt watching Gary's video at the show was how to twist the tool bit 90° and use it to give a very fine "shearing" cut on one side.

Phil

Edited By JasonB on 16/05/2018 11:21:06

Quote "I was under the impression that the gears for switching the lead screw direction had a pressure angle of 20, including the two fiber ones, while all the rest have a pressure angle of 14.5."

The above statement is correct, there are two different pressure angles in use on the Super 7.

I discovered this fact when making my Meek screwcutting clutch a few years ago, and it was confirmed by an ex Myford employee at the time. Graham Meek also updated his designs to show this.

Phil

I have a 1930's French wall clock that has an all aluminium movement, I have often wondered why it was not more common as well.

Phil

We used to own a full size Aveling DX8 roller, it was a lovely machine to drive.

I too came to the conclusion that a 1½" model would not be capable of doing much work, and so decided to make a 3" scale version back in the 1980's, I got as far as finding the thick walled tube to make the rolls from. However because of other commitments it never came to anything and those embryo rolls ended up as planters in a friends garden many years ago.

I still have an original Aveling General Arrangement drawing for the roller somewhere in the loft.

Phil

Just stone a tiny flat onto the cutting edge by hand to reduce the rake to zero.

I have a set of drills modified like that for brass use only and they never try to grab.

Phil

In theory you should be able to drive it out of the spindle using a standard removal wedge, then as you say, twist the spring to release it from the broken tang drill.

I do agree with you that it is not something I would want in my own spindles.

Phil

I reckon its so you can use a drill where the tang has broken off. It will tend to grip in one direction and release in the other direction, thus allowing the drill to be removed easily, if you use a standard reducer the broken tang drill would be difficult to remove.

I have never seen one of these before, but they look as though they might do the job.

Phil

This YouTube video shows how to use a wiggler.

https://www.google.co.uk/search?q=how+to+use+a+wobbler&oq=how+to+use+a+wobbler&aqs=chrome..69i57j0l4.4314j0j8&sourceid=chrome&ie=UTF-8#kpvalbx=1

Phil

The basic machine is an Aciera F1.

Phil

I made my own angle setting gauge for the Union grinder, I can let you have the drawing if you feel inclined to have a go at making it.

I found the original motor to be unsuitable for my use due to its speed limitations, so I designed my own grinding head for it. This unit will also fit onto the Myford super 7 lathe and can be used for cylindrical grinding as well.

Here it is grinding the big end journal on a model engine crankshaft.

The Union gets used for all sorts of jobs, once you get it up and running you will think of plenty of new uses for it.

Gear Hob sharpening.

Four Facet drill grinding

Surface grinding

Phil

Brian

Do you need any other information for your Union T&C grinder ?

I have a few documents etc stashed away.

Phil

Hi James

Forget Sifbronze you will damage the shell, and forget soft solder the joint will not withstand the vibration and will fail in use very quickly.

Silver solder is definitely the way to go, that is how the shell on my own Austin 7 special was joined.

Phil

Just remember the golden rule.

When someone asks you "When will it be finished" NEVER EVER give them a date or time.

I have found this works well in my design engineering job at work too. Its all very well and good somebody with half a brain drawing a progress line on a project plan, but it never works out that way in real life does it !!

So now when I get asked "when will the design be finished", the answer is it will be finished when the customer has paid for it.

Phil

Most model engineers never finish anything, so the question becomes irrelevant.

As years pass by, this applies to me for sure.

Phil

I have one of those, its called a Verdict "Junior"

Phil

Have you tried clocking the dividing head spindle runout on the back face where the chuck backplate seats as well as the diameter, a very small deviation there will be much magnified on the workpiece at the front of the chuck.

It could be a tiny bit of swarf embedded or something similar.

Phil