Milling square

[rudivoller]

I am going to mill a small square approximately 4 mm deep to mount the fitting below. To do this, I plan to use my hand router (even though it would be easier with a chisel). But the question is: how on earth do I achieve an exact square? I don't want any rounded corners!

 

[jon_h]

Chisel out the corners with a chisel. There is also a special type of drill that drills and punches at the same time, creating square holes. But that's not something you invest in for just a couple of holes...

 

[rudivoller]

Thank you for the response, but shouldn't it be possible to build a jig somehow? I would really like to use my mill...

 

[jon_h]

I mean that you route out your holes, and then fix the corners with the chisel. You can't route the corners to sharp 90-degrees..

 

[rudivoller]

I mean you rout out your holes, and then fix the corners with the chisel. You can't rout the corners to sharp 90-degrees..

I understand. I can't avoid the chisel...

 

[jon_h]

No, I don't think so. Unless you have a Multimaster or Supercut, of course.

 

[ByggPutte]

Not a square milling cutter?

Best regards, Putte

 

[tiggre]

perfect 90-degree angles...

Trend Corner Chisel, TRECCHISEL at D&M Tools

 

[rudivoller]

perfect 90-degree angles...

Trend Corner Chisel, TRECCHISEL at D&M Tools

I knew there was something. If you can go to the moon, you should be able to mill square

 

[andersmc]

Whether something is square or not is just a matter of definition. In this case, it's about how small the radius in the corners has to be for us to perceive it as a corner and not a radius. You can always mill with a tool with a very small radius and create a hole that can be considered square. Even that thing in Tiggres' link has a radius in the corner, albeit very small.

 

[tiggre]

Even that thing in Tiggres link has a radius in the corner, albeit very small.

well, I have one myself...

it's a chisel with a perfect 90-degree angle, not a milling cutter... but you use it with the router then place it in the corner and whack with a hammer and you have a perfect 90-degree angle...

 

[andersmc]

Well, I understood that it was some kind of punch. But if you put it under a magnifying glass you can see that even that corner has a radius. Maybe 0.1mm or so, but it is a radius. There is nothing that is "exactly 90°".

 

[ByggPutte]

There is nothing that is exactly 1 m either.
It always deviates a little .
It sometimes goes to extremes .

Best regards, Putte

 

[H_L]

The fittings that were intended to be recessed also do not seem to require any extreme 90° precision. The 90° chisel seems to be a good thing, but it should be possible to achieve a decent result even with a "regular" chisel.

 

[tiggre]

Maybe 0.1mm or so, but it's a radius. There's nothing that is "exactly 90°".

Actually thought of adding something similar

what's good about it compared to a chisel is that it reduces cracking that can occur (where it cracks further from where the chisel ends...

I mostly use a chisel myself... but that little rascal is not bad to have lying around....