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Member postings for Oompa Lumpa

Here is a list of all the postings Oompa Lumpa has made in our forums. Click on a thread name to jump to the thread.

Thread: I need to buy a Slitting Saw
19/10/2013 21:50:11

No doubt all of the various factions will argue for and against (and that is fine by me) but I need to buy a slitting saw. I don't have one or any other method of slitting a bush so it's time to "invest" in more tooling. I need a MT3 arbour and that's the first question, which one? I have seen both a 'Screw Type' and 'Nut Type' milling arbour for sale on this page -> **LINK**

and as I don't have anything like this and I would like to buy only one this month which one should I be buying?

Thread: Machining Polyurathene
14/10/2013 20:48:08
Posted by Ian Phillips on 14/10/2013 19:14:10:

Graham

What do you mean by Polyurathane?

The Polyurethane I know of is a rubbery sort of material and certainly would not produce white snowflakes. I have only 'machined' it on the lathe with Stanley knife blades.

Can you give a better description of the material?

Ian P

Hi Ian and thank you all for your replies so far.

"Snowflakes" is probably a bit of a dramatic term. Lots of fine crumbly white bits is probably closer to the truth. It is yellowish translucent and as described above, soft and bendy. Yes - Horrid is a good description. You could almost certainly tie a knot in a piece of 8mm diameter.
Not like Corian Jason - which I have machined with great success in the past.

How do you use the Stanley blades to turn material, they are slicing blades?

14/10/2013 18:59:56

I have a specific job I need to do and it involves making some seals from Polyurathene. I have bought a couple of lengths and today I chucked up a 22mm diameter 50mm long piece in the lathe. I tried a few different cutters and produced a very attractive pile of "snowflakes" on the bench.

I have tried HSS, Tipped tools and Tungsten Carbide. Anyone had any experience of this material? The finish produced by the tipped tool was the most acceptable but I was unable to machine to any sort of tolerance. Very much hit and miss.

TIA.

graham.

Thread: Recovering a Milling Vice
14/10/2013 18:54:12

Jason, thank you. Sometimes you get tunnel vision and for the lfe of me I couldn't see this. I will set to and make some clamps as per your drawing.

I appreciate the guidance.

graham.

14/10/2013 18:40:03

"was" I think is the word you are looking for. It is only a rotatary base if I have the other half, which sadly I don't.

But any suggestions as to how to securely attach it to a mounting plate gratefully recieved. The hole is tapped 5/8 Whit.

14/10/2013 17:30:58

A couple of photographs of the actual vice.

13/10/2013 21:13:47

Good idea but I don't think it would work, the bottom of the vce is too thin. I think if i took a picture and posted it that would help.

Thanks though, it is certainly another angle.

13/10/2013 20:32:29

Hi everyone, long time lurker but I recognise a few familiar names from other forums

Well, I didn't quite know what to use as a title but this is the scenario. I have aquired a pretty decent 4" jaw milling vice. Snag is, someone has milled off the cast lugs that you would use to hold it down to a table. The short "wings" that are on either side of the jaws (usuually) are missing. The upside is there is a good 14mm tapped hole in the centre of the underside. It is not a swivel base.

In order to use it, so far, my plan is to use a countersunk machine screw to bolt a square plate to the underside and lock it by drilling either side for a silver steel dowel.

That's as far as my thinking process will go so far so I am looking for ideas. Am I on the right track? I would of course machine a couple or four slots in the plate so I can mount it to the milling table. Should I use countersunk machine screws instead of the silver steel pins in order to furthe secure the base? There is no question of welding as the base is cast.

Thanks everyone.

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