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 Rank: Beginner Level 1 Groups: Registered
Joined: 06/10/2020 Posts: 8 Points: 10 Location: UK
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Hello
I need to put a 45 degree chamfer onto the edge of a 10 x 10 x 1mm piece of mild steel. It needs to be EXACTLY 45°.
Any suggestions?
With thanks
J
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 Rank: Super-Elite        Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,508 Points: 13,684 Location: ipswich
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Hello there.
What model is it for?
I'm sure somebody here will be able to help.
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Rank: Beginner Level 1 Groups: Registered
Joined: 06/10/2020 Posts: 8 Points: 10 Location: UK
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> What model is it for?
It isn't for a standard model as such. It is just for a novel product idea that I am working on.
I just need to find a way to cut and file by had down to an extreme accuracy. My workshop skills are a bit rusty!
J
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Rank: Administration  Groups: Administrator, Administrators, Forum Support Team, Global Forum Support, Global Forum Support Team, Moderator, Official Builds Joined: 24/08/2009 Posts: 1,928 Points: 5,796 Location: UK
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Howdy,
Your best bet is a milling machine. To hand file it to the exact degree, no seconds, by hand? Almost impossible.
Good luck,
Mark
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Rank: Beginner Level 1 Groups: Registered
Joined: 06/10/2020 Posts: 8 Points: 10 Location: UK
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> Your best bet is a milling machine. To be completely honest I don't know exactly what you mean by a "milling machine". I guess I'll have to buy something. Please bear in mind that this is for a small home workshop and it would need be fairly compact and to work on a table top. Does this help? I have a small Proxxon Micromot 50/E Powertool + stand. Fwiw, the powertool is rather under-powered at just 40 Watts and I'll need to cut 1mm thick mild steel.   What about something like this Proxxon 27100 MICRO Compound Table? http://www.proxtools.com...iewPrd.asp?idproduct=33
 Or should I just abandon the Proxxon? Remember I'm needing to cut 1mm thick steel plate and end up with an accurate 45 degree chamfer. Either way, I can't quite imagine the best way to make the cut, in order to make a really clean edge. e.g. should I use a spinning abrasive disk? :^/ J
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Rank: Administration Groups: Administrator, Administrators, Forum Support Team, Global Forum Support, Global Forum Support Team, Moderator, Official Builds Joined: 24/08/2009 Posts: 1,928 Points: 5,796 Location: UK
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A 1/4 or 5mm DIA end mill would do the trick. Your abrasive disk won’t work. They “flutter” under load. Google or hit Amazon for the Proxxon mills. I have both versions, and love them. Quality of cut is really dependent on determine the proper cutting speed. (CSx4/D, with CS being determined by the appropriate machinists manual. The formula is for RPM) Also, to avoid confusion on posts like this, I’ve instituted a new policy. I realize your are working on some nebulous project, and that this doesn’t really apply to you. But, we aren’t really the appropriate forum. A model engineering forum would be FAR better to address your questions. https://forum.model-spac...=338473&#post338473
Best, Mark
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Rank: Beginner Level 1 Groups: Registered
Joined: 06/10/2020 Posts: 8 Points: 10 Location: UK
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> Google or hit Amazon for the Proxxon mills. I have both versions, and love them. Interesting that you like the Proxxon. Which versions do you have? - MICRO miller MF 70 - c. £300 - MICRO miller - FF 230 - c.£1,000 - Miller - FF 500/BL - c. £1,808+VAT Btw, did you find that the table of the MF 70 seems to be rather poorly engineered, with pretty bad table wobble? https://www.youtube.com/watch?v=Ws6UwE1qB2I
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Rank: Administration Groups: Administrator, Administrators, Forum Support Team, Global Forum Support, Global Forum Support Team, Moderator, Official Builds Joined: 24/08/2009 Posts: 1,928 Points: 5,796 Location: UK
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Hello, I have this, plus the lathe as one; https://www.amazon.com/g...title?ie=UTF8&psc=1
And then the MF-70 as the other. I don’t recall any loose gibs, but if there were, I tightened them up as a matter of set-up. I was a machinist in the US Army for 10 years. (Got my hands dirty for 7, then got stupid and became an NCO) Best, Mark
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