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Thanks for that Charles, I must try that, I haven't been looking for any aluminium yet. But definitely my experience with steel in round or hex offcuts and bar ends, apart from the one fabrication shop as mentioned above, it turns out he's a friend of a friend, so it might work out even better in future.Some months ago I went into an aluminium welding and fabricating company to try and purchase some short lengths of tube and some plate which he cut to size.
Whilst chatting I bemoaned the fact that stupid hobbiests such as my self were finding it very difficult to buy small amounts of raw materials for our projects and thanked him very much.
Driving past yesterday I noticed he now has a huge sign outside stating Off Cuts for sale. It pays to chat.
Another steel fabricator also allows you to rummage through his off cuts bin.
Its well worth trying these places and let them know what you are trying to build.
Not all but some will be very helpfull. I've found the smaller companies are the best, the large ones just trot out the WH&S card with a short no.
Suck it up sunshine, I know you folks in Townsville think you live in a rain shadow area, you average 2 -3 times the average annual rainfall of Adelaide, and while the temperature is getting up to 19 -21 c by late afternoon it goes below 10 overnight. Tonight they are predicting 8c at 6am.Its a bit weird here at the moment, theres some weird stuff been falling out the sky all day.
I cant remember what its called but rumour has it that its common elsewhere.
Temperature has plummeted to a sub arctic 25'C Brrrrrr
Hi Damo, Not familiar with that machine, but I looked it up and it appears to be well liked, What size cutter are you using. what does your manual say about this process.Hi All,
I'm looking to buy some decent endmills for cutting mild steel, would just like to know where people buy theirs from, I don't mind spending a bit of coin for quality. Would like to buy Aus made if possible, but not mandatory but would be good to buy from an Aus seller.
I'm new to machining and have bought a HM-50 mill second hand and am starting to get comfortable enough with the machine now, although really I don't know what I'm doing.
I've tried side facing some 16mm thick mild steel plate with the end mills I've been buying from Hare and Forbes but I can't seem to get it to cut well, the tool seems to start to flex or doesn't cut at all, it just seems to slide off the side of the material, I believe I have my speed right and I have tried adjusting my feed rate, but nothing seems to work, I was starting to wonder if I was using the wrong type of cutter.
Looks like you're onto it, If you were running too fast then have probably dulled the cutting edge of the HSS. They are buggers to sharpen by hand. even for the experienced, much harder than a drill.Hi Bob,
Thanks for the reply, I'm using a 12mm HSS End Mill, It was pretty new when I first used it but the more I think about it the more I think I have it running too fast.
Depth of cut was probably .5mm, aI think I tried bigger and smaller cuts at the time to no avail.
Will have to check the speed tomorrow, time to get kids to bed and all that stuff.
The condition of the material is what is left after cutting with an angle grinder.
After some teething problems at the start again either running to fast or too slow I now have my 50mm carbide insert face cutter making nice chips and cutting through the stock like butter.
The material 16mm thk. flat plate, 100mm long set up in the vice with as little overhang as possible, probably 10-15mm.
Depth of cut, I'm trying to face the full depth of the 16mm plate, I've tried cutting small sections and I've tried the whole face.
I'll try take some photos tomorrow after work if I get the chance.
If your slowest speed is still too fast you might have to figure a way to get it lower. But do the calculations make a chart or download one from the internet. Always remember you can get away with running HSS a bit fast on a lathe because it is easy to resharpen the tool, but with a milling cutter not so always start a bit slow and build up until the chips are just starting to com off with a bit of blue colour, that's fast enough and run coolant, your cutters will last much longer.I got about 20 minutes in the shed the other day and yep, looks like I was running a bit fast.
I slowed it down ti the lowest setting (which still seems bit fast) and got some better results, but I think you're right Bob, I think the end mill has lost some of it's sting with the abuse I gave it. Not to worry.
Hopefully now I can progress my project a bit more now that I've worked it out, will try to remember to take some photos tomorrow if I get the chance.