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| A thing..... |
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| Stilldrillin:
I know what it is, now! :thumbup: I think....... :clap: Well..... :scratch: Well, I would...... If it was made of brass/ bronze...... ::) Hmmmmm......... David. |
| bogstandard:
Darren, You are doing a sterling job murdering this bit of metal, it looks like you have got the hang of cutting stuff to the shapes you want. A very well done for that. :clap: :clap: We've just got to get the quantity of tool kills down a bit. But I hope that will come with experience and the use of lube/coolant. I know it is messy and gets everywhere, but it is either that, or your pocket will start to feel the cost of all the cutting bits. To such an extent, it might be cheaper to buy the parts rather than making them. As soon as you start to get onto harder materials you must consider getting some sort of coolant on there, before tooling attrition gets too much to bear. I will be looking at the spray jet unit I have just been given within the next few weeks, maybe that should be considered the way to go. John |
| Darren:
Well done Stew, yes it's a QCTP, :clap: I have to be honest, I wanted a bigger one than this. But it is at least bigger than the one on my mini lathe. I may just end up cutting the dovetails down a touch to the same size as the mini QCTP. Then I can use it's tools on both lathes. Also I will be ordering some steel stock and having another go. I'm hoping mild steel will be a lot kinder to tooling and be a bit easier to use. Having said that, even though I have killed about £30 worth of tooling, a block of steel would have cost me almost that with postage. So it's swings and roundabouts. The aim was to have a go at cutting dovetails, I think it's worked rather well and I'm fairly pleased for a first attempt. Bit of a learning curve and lots of thinking. Didn't all go to plan of course but I'm learning. For the dovetail I cut a tool to 60deg, wrong, let the shaper deal with the angles and the tool the cutting. I discovered I needed less than 60deg on the tool. My shaper is not marked for 60deg, only goes to 50. So some re-marking was required there. BTW, at that angle it's a long way over and you start to run out of room. 45 might be a better choice here, but existing tooling is 60 so it had to be. I was inspired by this chap... http://homepage3.nifty.com/amigos/qctp/qctp-e.htm http://homepage3.nifty.com/amigos/qctp/s-img_8081.jpg[/url] Have a look at the rest of his site, very talented chappie http://homepage3.nifty.com/amigos/index-e.html Now then, I need to buy some steel stock, but what and from where? There are so many grades to choose from. My biggest fear is spending a ton and ending up with material that machines like poo... Some help chaps if you will, I'm not finding much at the scrappie other than small pieces. |
| bogstandard:
For what you are doing Darren, I personally would use EN1A steel. I hate quoting numbers, but that is recognised everywhere as a lightly leaded, free cutting mild steel. If you can't get an easy smooth cut, and a superfine finish on that, you should take up knitting. John |
| NickG:
Looking good Darren, that is a project I wanted to do too but think I may just buy one and concentrate on making engines, otherwise I'll never get anything done! :lol: |
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