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How to make a square hole

How to make a square hole in any workpiece? Everyone can drill a round hole, but sometimes it becomes necessary to make a square hole.
How to make a square hole

I needed to make a large square hole in the round billet so that the bar square, firstly, could move freely in the hole, and, secondly, that there was no big play. That is, you need a hole for a square of perfect shape and size. So the question arose - is it possible to do this with your own hands not in the factory?
How to make a square hole

I have already done this, and therefore I answer - it can be done, but in the absence of a specific set of tools, a quality hole cannot be made.

Will need


So, what you need in order to make a perfect square hole:
Milling machine with detachable and groove disc milling cutters, electric arc welding machine, lathe.

Making a square hole in the metal


In order to make a square hole, we perform the following steps:
We clamp the workpiece in the milling machine and with the help of a disk mill we grind a rectangular groove;
How to make a square hole

It turned out that the work is much faster with the cutter, and therefore had to put it instead of the groove. We make a reverse replacement, and with the help of a grooving cutter we clean the corners of the workpiece.
How to make a square hole

We insert a square billet into the resulting groove, and another rectangular piece of metal in the upper part that remains open.
How to make a square hole

How to make a square hole

This small piece is welded to the main blank with an electrode using conventional arc welding.
How to make a square hole

How to make a square hole

We clean the resulting element from adhering metal, which is best done using a lathe, having fully machined and polished.
How to make a square hole

As a result, we get a round billet in which there will be a perfectly square hole.
How to make a square hole

How to make a square hole with improvised tools


All these technological cycles can be done with the help of simple tools at hand, using only an angle grinder, which is popularly called a “grinder”, a vice and a welding machine.
But in this case, firstly, you have to sweat a lot, and secondly, the product will not work out so even.
When performing these works, it is imperative to comply with safety requirements:
  • when working with milling and turning machines, locksmith glasses are required;
  • when performing welding work, mittens and a welding mask are required.

So, if you wish, you can make a square hole of any size no worse than the factory!
How to make a square hole

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Comments (61)
  1. Guest Alex
    #51 Guest Alex Guests March 25, 2019 04:56
    0
    Question...
    And why such difficulties, if there’s a lot of equipment at hand. round billet in half. with a milling machine, grooves half a square deep and weld to your health.
    This I am silent about the fact that the "turning and milling machine" - this is improvised means!
    photo, the same factory parts, and not what made afftor. There are no welds in the photo!
  2. Alexander24
    #52 Alexander24 Guests March 26, 2019 05:18
    0
    For large batches, they use 3-sided drills, drill on the conductor using a floating chuck. The corners are slightly rounded. Drills, of course, special (in stores there are none)
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