Here is a list of all the postings Nick Welburn has made in our forums. Click on a thread name to jump to the thread.
|Thread: Tap Extractor|
I did this recently. Managed to drift it round using a scriber and a little toffee hammer. Just little glancing blows so it starts to spin.
|Thread: Tightening a Threaded Bolt|
I’ve had a couple of these that are less than great. Not sure why they get chewed up. On my last project I just fitted new castings. Not sure if some of the aftermarket callipers are a touch off and make it easy to chew up?
|Thread: Mounting stuff to a Faceplate|
That’s an awesome thread and a whole new forum to consume
cheers I can make a set of those clamps. Is it the done thing to drill and tap the face plate or do big boys manage with the existing holes?
Ok it seems my language is incorrect
I have a face plate. This is currently mounted on the backplate.
How do I safely mount stuff to a face plate?
So I’ve finished my 10v, I’m now building a cringle model engineering boiler. To do this I need to turn down a large ally casting. It’s too big and irregular for my 4 jaw.
|Thread: Broken tap extraction|
Jim Smith B had the clue to the answer. Held it in a vice and drifted it round, not easy with a 7ba tap. Not much to hit. Got a coupla turns on then got it with the fine nose. Have ordered a new set of 7ba taps to replace the chocolate ones I’ve been using
Dropped this and snapped the tap.... any bright ideas. Not enough for molegrips
|Thread: Mechanical Calculators|
If your going to chuck them I’d list them and just let them run. You might not make much but they’ll go to a home that wants them.
|Thread: Shock at low pay for high skill|
Apologies if I’ve offended any here, just enjoying the debate.
I like it as a question, the answer is immaterial what’s golden is seeing the thought process. That’s why it’s deliberately obtuse.
Interesting discussion, I think the crux is probably the definition of engineering. For me I’d say that’s the use of abstract science in a creative manner to solve a problem.
My lad will be an engineer, he’s 8. His hero is Isambard Kingdom Brunel.
The nature of his engineering in the physical / technology / philosophical domain I couldn’t answer you. My father was an aircraft engineer, I’m trained in electronics but work in software. As for my lad maybe it’ll be effective use of AI?
|Thread: First model for a complete beginner|
I went straight in for a Stuart 10v, lots of guidance online and spare castings are easily available.
|Thread: Milling on a Lathe with a Vertical Slide|
I tried this, despite the sage advice of Jason B. I managed to make some poor cuts and break a couple of end mills. I now own a mill despite making all the protestations about space. It does everything better than attempting it on the lathe. I am however a rank amateur so a more experienced operator may be more successful.
|Thread: Thinking about where I need to improve - measurements|
Awesome, I suspected some one would have some immediately actionable changes I could make! I’ll work on setting out from one corner to minimise backlash
I’ve been thinking about the engine I’m making. It’s very much of the nominal dimensions make the things fit inside the other things.
or as I read endfloat / backlash is not a problem I could learn to work round it. I’m not thinking about adding in DRO’s to measure actual moves as opposed to ‘screw’ moves.
I strongly suspect that the old hands on here could use my machines to a much finer tolerance.
I have a vernier and a micrometer and I understand how to use them. (I think!)
Any wisdom welcomely recieved!
|Thread: Stuart 10v valve rod|
Ok - progress has been made. Kinda! I’ve used the other tool post and really carefully set the tool height. I was probably 0.25mm or so down.
Hunting about I found a steel bolt. The same process reduced to 3.30mm along the length and down to 2.5mm at the end then on the last pass dug in and bent.
I reckon with a bit of luck, oil and finesse I might get this.
Lots to go at here. I think my tool is a touch below centre. It’s shimmed up with bits of .8mm mild steel. This may need addressing. I’ll dial it in with the quick change tool post. Jason’s point that it only needs machining at one end is very valid. But I’ve clearly made something else on the engine with that material... I think it’s the piston rod.
im going to try and get a good cut on the remaining part with the tool better centred. Clearly what leaves a tiny pip is enough to give a vertical force and bend the rod.
learning more with every mistake
It’s mostly constant, the tip is taken down to 3/32 but only for maybe 1/2” that would be easier to manufacture as it wouldn’t need much stick out from the Chuck
Apologies it must be 1/4 about 6mm or so.
I’m struggling with this it’s reducing a length of 1/8 rod down to 3.3mm. It’s a length of about 2” or so.
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