Milling something to thin to mill!

[Midland]

Just found this and thought someone might be fascinated. Ed, what is this machine doing when he puts the tools in? Some sort of compressed air chuck maybe.

www.youtube.com/watch?v=zJIs0LihNPQ

David

[jasonb]

Air powered draw bar, you can make your own with an air wrench.

[Deleted]

R8 equipment with air-operated drawbar as mentioned....Good link there David..

I mis-understood his original intention and thought he was going to machine the item that you first see him handling..

[SteveW]

Anyone spot the guy's web site?

Try Tom's Techniques

At the end of the clip I spotted another interesting item. Baking soda and super glue apparently gets you a glass hard substrate useful for repairing things.

[pault]

have a look at this site it makes interesting reading
www.haas.co.uk/case_studies/micro-world-medicine.html

[ejparrott]

Yeah he's got an air powered drawbar.....flash git....!! We had one at work on our Bridgeport clone, it worked ok for a while. It was a bit fussy about the drawbar being raised right up, and eventually it chewed the end off the drawbar. We took it off and replaced it with a standard drawbar. You can do the same with a simple air ratchet, and it can be used on Morse Taper machines too, not just R8 machines. It does really rely on the key still being present in the bore of the spindle, and I've yet to meet a bridgeport where it is. If it's been wiped out, then you have to hold the collet, otherwise it just spins if the thread gets a little tight. This is much less of an issue when you're winding tools in by hand, as it's much slower, and you tend to wind in the drawbar by hand anyway.

[alanstepney]

Last year I was at a pals house when he was trying to mill a 1/6" plastic strip to half that thickness around the edges so that it fitted flush in something-or-other.

I stuck it down with double-sided tape and took VERY light cuts.

It works.

[GWR 101]

Paul that site is something else and those Butterflies are fantastic, I remember back in the 60's being shown the worlds smallest tube which I believe was made by A&P in Oldbury. Regards Paul

[jem]

Baking soda and super glue apparently gets you a glass hard substrate useful for repairing things.
Please can you tell us more about this.

Jem

[vulcanbomber]

Mar 3, 2015 11:12:38 GMT alanstepney said:

Last year I was at a pals house when he was trying to mill a 1/6" plastic strip to half that thickness around the edges so that it fitted flush in something-or-other.

I stuck it down with double-sided tape and took VERY light cuts.

It works.

It's quite common, i've double sided sticky taped stuff to the face of a chuck before now to face it up.... My dad does it on a regular basis when we cant  turn a disc thin enough to start with.

[SteveW]

Mar 3, 2015 17:40:25 GMT jem said:

Baking soda and super glue apparently gets you a glass hard substrate useful for repairing things.
Please can you tell us more about this.

Jem

Looking at the video you make a pile of baking soda add a few drips of superglue and watch it go off. You have the substrate described.

Perhaps worth making sure the pile of soda is somewhere you need filling either before or very quickly after adding the superglue.

See it here...

[jma1009]

having done a few repairs to musical instruments over the years, i can vouch for the use of 'super glue' though when repairing guitar nuts and ukulele nuts rather than replace them, i use bone dust mixed with superglue. new nuts are milled out of bone. the baking soda is simply used as a colouring medium in the youtube posts.

cheers,
julian

[jem]

Thanks Steve, I will have to do a bit of experimenting with it

Jem