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Member postings for Digger

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

Thread: Sharpening drills
11/11/2010 09:56:49
I have a fixture from draper that allows you to set the angle of the rake for the drill and then you use it against the bench grinder to get a good edge. You can try to re grind a drill by the "Rack of the eye" method but you need a steady hand, it's okay to use that method if need a drill right there and then but it won't really be accurate. The draper fixture is okay and not too expensive and will give a good result once you've got used to using it.
Thread: Is this hobby dying?
08/09/2010 23:12:30
Hi, I thought I may contribute my five penneth, I am (was) an engineer working in the aerospace industry until an accident forced me to retire early (very early) after not doing much for a year or two, I just had to get myself a workshop then a lathe and a milling machine bandsaws etc, I just like to tinker around making things or modifying things, it's a grand hobby and I am a young 44 years old.
Thread: Facemill and MT2
07/07/2010 23:08:38
Hi Paul, I suppose you could just try it and see, approach the first cut with caution? if you have the manual for your machine tool it will maybe tell you the maximum size of facemill you should use? My guess is that if you don't take too deep of a cut and use the right speed and feed rate ,it should be okay.
Thread: What price frustration?
01/07/2010 09:46:27
I don't think it's realistic to expect a really accurate piece of kit for the little money we pay for the lathes and mills, as we can rectify the machines when we get them home.
Thread: "Precision" or "does NOT do what it says on the tin"
01/07/2010 00:24:07
Hi Richard, Yes preventative maintenence is always a good idea, overall I am pleased with the accuracy of my little milling machine and mini lathe, and as has already been said i suppose that production methods and standards of work will improve over time, but unfortunately the cost of the products will also increase! of course the accuracy of a persons own work depends on their requirements, for the most part i have seen some truly fantastic work made for model engineering exhibitions, and if people can manufacture these type of engines and components in their home workshops using perhaps cheaper imported machine tools, they are indeed good engineers, which goes back to my earlier post, if we get a tool that is slightly under par (from Ho Lin Wun) we can always correct it and go on to manufacture first rate products
21/06/2010 22:36:02
Yes I was surprised at the accuracy of my three jaw chuck, I got it with the little colchester lathe from chester machine tools. If I've only paid a few quid for something I'm not too dissapointed if it's not 100% perfect, I don't mind doing a little work to bring it up to spec.
21/06/2010 17:47:49
I too have far eastern machines and I'm not "knocking " them they cost me little and can do a sterling job in the right hands, of course lots of machining work is now done on cnc machines with programmes written in the drawing office and sent down to the shop floor, but if you don't have a skilled engineer and only semi skilled  operating the machines they cannot then be blamed for substandard work being produced, again it's probably as you say bogs the assembly of the machine where problems should be picked up, I have seen some appalling examples of machined parts offered for sale as will most people at one time or another, but what I'm saying is, If the chap who is machining parts does not know and endmill from a windmill and has no idea how to even read a mic, or recognise a bad finish on a surface plate, then substandard work is to be expected.
20/06/2010 22:36:04
Yes I agree with that especially for commercial household products inspection is probably more of an afterthought, for work that is supposed to be very precise the parts should be self checked by the machinist and then again by an unbiased inspector who is totally impartial, but that is meaningless if the parts are being produced en mass by unqualified people which is probably the case with oriental products.
20/06/2010 15:53:23
Hello all, This is my first post here and this thread in particular makes for some good reading. Until quite recently I worked in the aerospace industry using some fantastic machine tools that would cost upwards of a million quid, of course accuracy in the aero industry is paramount, but the company had the wads of cash to throw into the tooling and machinery, I now have a small workshop at home i have a conquest lathe from chester and a little cmd10 mini mill from clarke, I did laugh when i first ran a clock over the machine bed on the mill, but I wasn't at all surprised, I don't think that is is realistic for any of us to expect serious accuracy from any of theses cheaper imported machines or their tooling and I agree with Bogs, the slight inaccuracies of the imported tooling that we can buy for little money is a small inconveinience and is usually a quite straightforward matter for an engineer to put right, it may sometimes be a little annoying when things aren't running true, but it's a bit of fun to put them right before getting on with the business of producing a part.
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