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[small.planes]

I’m going to say static - if it was a runner you would know.
Impressive machining skills nonetheless.

Dave

[small.planes]

Bear in mind if you are planning on using V blocks to create your accurate 45 degree angle that a V block isn't necessarily a 90 degree V shape. It's...

[small.planes]

A thing I learnt during my time at a startup: Make a decision. Then at least you will find out quickly if it was a bad decision. Even a bad decision is...

[small.planes]

When I made a custom stock for my target rifle I used the mill with a 30mm ballnose router bit to cut the inletting. Used the mill flat out (4500rpm)...

[small.planes]

Those are rubbish. If the op is concerned about a Proxxon then these are 10x worse.
I bought one as a sacrificial xy for a tool grinder idea....

[small.planes]

Just spotted a gorgeous Sixis 101 : https://www.nielsmachines.com/en/six...cessories.html

Only as much as a car,...

[small.planes]

14 or 15mm x 1 bar, 45degree chamfer bit - if your cheap a carbide router one.
clamp bar down on a spoil board with one edge parallel to the long...

[small.planes]

For a 4” long cut I would probably just use a hacksaw. Then file off the rough edges, maybe rub on some wet and dry paper on a flattish piece of steel...

[small.planes]

ship69 That was a 2 second google search for small high speed mills. They exist, they are usually CNC.
Small Mills for steel exist. You can (I...

[small.planes]

High spindle speeds on none tiny cutters requires fast feeds to give correct chipload. Manual handles can’t keep up. So mostly high speed spindle =...

[small.planes]

Many mills have very high rpm spindles.
Speed with power and rigidity gives the ability to shift metal rapidly.
Many hobby cnc mills are...

[small.planes]

Theoretical cutting speeds are just that - theory. They are usually calculated for most economical metal removal based on tool wear, machine capability...

[small.planes]

I’d say 3 thou is more than a little runout...
Machine tools have improved massively over time.
My other mill is 1986, top speed is 4500...

[small.planes]

Manual machine tools are obsolete in the general world.
There are edge cases (as usual). Hobbies is one of those.
Small lathes and small mills...

[small.planes]

How big?
My “large flat surfaces” are not your “large flat surfaces” - I have several machines (toolaholic) -the “proper” mill can do...

[small.planes]

Way back in 2008 I initially converted this MF70 to CNC (https://bbs.homeshopmachinist.net/fo...is-cnc-project)
The tooling...

[small.planes]

Mostly it was runout. The new spindle is ER16 direct with about 1/10 of the runout of the Proxxon one.
The Proxxon head is also limited in its max...

[small.planes]

Test cut in cold rolled steel, 2mm (IIRC) carbide endmill, something like 12krpm.
...

[small.planes]

MF70 based, 750W spindle, upto 24k rpm. Wouldn’t want to use it by hand, but fortunately I cnc’d it. High spindle speeds need a consistent feed especially...

[small.planes]

That’s understandable, there was pie and good company.

Dave...