Member postings for Dave Bullock MBE

Hi

This modification is exactly what I need to do for my son who has just bought a lovely example M type.
We are both used to me Myforl ML7.
However how do I disassemble the main handwheel/rack pinion assembly?
There is the faintest mark that shows it may be 'pinned' to the shaft but I can't see the pin both sides of the hand wheel's boss. Do I have to drill this out?

Help please....thanks Dave

Hi Thanks everyone for all the super advice.
I was very lucky to rescue the milling machine and as you have commented it has cleaned up really nicely. I was hesitant to agree to have it at first as it looked very strange with all the extra pulleys. But then I had not realised it had been sympathetically modified such that it can be configured as either a horizontal or vertical miller.

I have tried the chuck off my Myford 7 lathe and the quill 'nose' thread is indeed the same which opens up many other opportunities

Dave

Hi Old Mart , my taper is 0.7" right at the point where it joins the chuck so would have to fully enter the quill. However the flats would have to be 0.2" wide and looking at your diagram would almost certainly break through into the collet 'cavity' in the chuck. Whether this would foul the collet or whether the straight section at the base of the cavity is 'free space' I am not sure?

Hi Peak4 I had not considered screwing something onto the end of the threaded end of the quill. I can check the thread compatibility as my lathe is a Myford 7. It would make an easy switch to try but I am not sure how true the chuck would run just screwed onto the thread? Maybe there is a referene face it can tighten up against. I will have to look.

Thanks chaps...
Dave

Here's a picture from a different angle before the strip down and relocation.
You can see why I thought it seemed Heath Robinson...... an HSE's nightmare LOL!

I managed to strip it all down but was thwarted by the two items arrowed below.
There is a compound pulley 'lay-shaft (Orange arrow) feeding power to the main horizontal milling shaft (arrowed yellow).
I had to leave this in situ as I couldn't figure out how to release the Vee belt between the two?

The layshaft (blue assembly) has a rotating pulley assembly and tensions the belt to the main shaft with the lever with the red knob.
I couldn't see how this lay-shaft shaft is removed from the blue adjusting assembly
Similarly I cant see how the main shaft (yellow) is removed from the body of the milling machine.
I could do with knowing the answer to this secret just in case I ever need to replace the Vee belt?

Does anyone know how these disassemble please?

Thanks everyone for your interest and great advice.
I will persevere with my Clarkson chuck.

Hi IanT

Wow! it does.

I thought it was a homebrew device engineered by the previous owner who made several super steam locos.
The whole machine looked a bit Heath Robinson until I got it home and started reassembly. I then realised that both horizontal and vertical milling functions had been preserved making the machine really versatile.
It's an Alfred Herbert (Coventry) machine from around 1903 and still going strong
Dave

Hi everyone, many thanks for your super replies.

Yes my chuck is like the ones in your link, (Peak4) the collets have the two small 'lugs' on the opposite end to the tapered 'nose'. I am beginning to get a sense that the Clarkson chuck is quite an asset and that I should maybe try to persevere rather than swap to ER collets? Problem is that I don't have a great selection of collets.
Going back to my ER swap idea....
My MT2 taper matches exactly the true dimensions published for an MT2 taper so that's good. However if you look at the attached picture you will see that the end of the quill has slots (creating a pair of 'dogs' that fit the the flats on my chuck. This means that the female taper starts inside the quill beyond the length of those two 'dogs'. A standard MT2 ER chuck taper will be prevented from mating fully because the dogs will strike the back of a standard ER chuck. before the taper mates, requiring those flats to be added to the chuck.
Looking at the ER chucks available on line, the chuck body doesn't look long enough to machine the flats without breaking through into the collet cavity?

I look forward to your further comments....Thanks...Dave

P.S. does anyone recognise my milling head below?

HI experts,

I have just inherited a very old C1903 horizontal milling machine with a vertical conversion.
The problem I have is that it has a Clarkson Engineering MT2 taper "Autolock" chuck (pictured). I would like to convert it to a standard ER collet chuck to be compatible with the collets used on my lathe.
However as you see the Clatkson chuck has two machined flats (arrowed) that mate with corresponding slots in the end of the milling machine's quill. The two 'lugs' on the end of the quill fit neatly over the flats on the chuck allowing the taper to tightly mate with the female taper in the quill.

I think therefore that the 'lugs' on the end of the quill will prevent a standard ER type collet chuck from fully entering the female taper?

So ..... has anyone found an ER type chuck (maybe ER25) that has the machined flats?
or
An ER collet chuck with enough material in the body that would allow the flats to be added without breaking through into the collet cavity?
or
Any bright ideas/advice please?
Thanks in anticipation ...
Dave