Here is a list of all the postings Thor has made in our forums. Click on a thread name to jump to the thread.
|Thread: Internal collets|
If you mean "collets" for an expanding mandrel, like this:
They are not difficult to make. When the topslide is set for taper turning I use the same setting both for turning the taper of the mandrel and the collets in the same setting. I turned the taper in more collets than I needed so I have some spares. For slitting I just used a small hacksaw.
Edited By Thor on 03/07/2019 16:07:46
|Thread: What do you use your lathe for?|
I too use my lathe primarily for making model steam engines and tools for my machines.
|Thread: Fly cutting|
That's good use of an old drill. Broken HSS drills make useful tooolbits. I made a couple of boring bars that work well, a bit smaller than yours though.
|Thread: Annealing stainless steel|
If the stainless steel is martensitic that would harden the steel. If it is martensitic cool slowly. I would try with a HSS cobalt drill, a short one is less likely to break. Try a higher speed and more aggressive feed and use coolant.
Edited By Thor on 01/07/2019 06:22:23
If it is austenitic stainless steel you should be able to anneal it by heating but you need a high temperature and then quench. When drilling stainless steel socalled Cobalt drills may be useful and don't let the drill rub. It need to be cutting all the time.
|Thread: Tungsten Putty?|
Yes, it means heavy stone, but are you sure it isn't Swedish? See here.
|Thread: Do you use Chinese HSS?|
I have European made HSS toolbits as well as some from ArcEurotrade, can't say I have found much difference. I tend to use carbide tipped tool for roughing and HSS for the finishing cuts.
|Thread: Do you clean your workshop at the end of the day?|
I try to clean away most of the swarf at the end of the day and sweep the floor, but I don't spend much time on cleaning up.
|Thread: More Workshop space, shall I or not..?|
That's a nice and cheap way to put some light over your lathe. I have a fluorescent lamp over my lathe and an anglepoise LED lamp with a magnifying glass, a necessity for my old eyes.
|Thread: HSS Tool Bit Size|
For my small lathe I use 5mm or 6mm square section HSS toolbits, I have a few 8mm for my larger lathe. As you say it is quicker to grind a smaller section toolbit to shape, I only have a small benchgrinder so large section toolbits takes far to long to grind. On my small lathe I even have a tangential toolholder that takes 1/8" toolbits that I use for small jobs.
Nose radius does play a part in the finish you get, I use a diamond hone to round the corner of the cutting edge. A couple of links you may find useful:
|Thread: Suitable wood for making tool holders|
If you can get hold of elm it is among the least acidic, according to this.
|Thread: Making a Start in FreeCAD|
Thank you Dave for your kind words and showing how to find the balance point. I guess I was lucky?
I understand that adding a local coordinate system is new in v.0.18.
Edited By Thor on 24/06/2019 17:09:06
I kind of managed to model Dave's cannon:
I left Transparency at approximately 30% to reveal some of the internals.
That is a bit strange, I just tried to make an external chamfer, and got no fillet (I also chamfered the free end):
On the other end I tried to just make the fillet, and got no chamfer:
I don't know what happened, are you sure you clicked on the circle line, not a surface. If I click on the ringshaped surface and chamfer I also get a fillet.
Edited By Thor on 23/06/2019 14:05:03
|Thread: Mill spindle speed|
Interesting modification you have made, any chance of a few photos? The top speed depends a bit on the diameter of the cutters you intend to use. Small diameter carbide cutters need a high speed so 4k to 5k rpm might suit you. The smallest cutters I have are 1.5mm HSS and the 2.5k top speed of my milling works OK as long as the feed rate is suitable. I often use a 63mm face mill so most of the time I use the low setting with a top speed of around 1.5k rpm.
|Thread: Making a Start in FreeCAD|
Following Dave's excellent tutorial I tried to make a model of something useful, a tray for my ER 16 collets. A friend of mine has access to a 3D printer where he works. I haven't tried printing the model as my friend is on summer vaccation.
I have tried to write an explanation of what I did here, probably many errors so I assume I will have to revise it.
Hi Kiwi Bloke,
I am trying to understand FreeCAD and have found a few tutorials that you may find helpful:
Thanks Dave, will be following with interest.
|Thread: Precision Metal Pen Oiler|
Those Pen Oilers are very handy, I have had mine for many years and use it when I need to oil my model steam engines.
|Thread: Lathe Speed - What am I missing out on?|
On my old lathe I do adjust the belt to get different speeds, low speed when turning large diameter jobs since I get more torque and high speed when turning small diameter jobs or brass/alloy to get the job done a bit more quickly.
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