How to make a crown of any size from a pipe

If it is necessary to drill a large diameter hole in wood, a crown is required. Moreover, the larger the hole needed, the more expensive the cost of such a crown. If the need for this tool is one-time, then there is no point in buying it. In this case, you can make the crown yourself.
How to make a crown of any size from a pipe

Materials:


  • steel pipe equal to the diameter of the required hole;
  • Sheet steel;
  • bolt M12;
  • hardened shaft

How to make a crown of any size from a pipe

The process of making a crown for wood


To make a crown, you need to prepare a piece of steel pipe of equal or several millimeters smaller diameter than the hole being piped. The length of the workpiece should slightly exceed the drilling depth. The edges of the pipe need to be trimmed.
On one side, the pipe needs to be plugged. To do this, a circle is cut out of sheet steel. A hole is drilled in the center of the plug to install an M12 bolt. The bolt is inserted into the circle and welded. The plug is then welded to the pipe.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

Next, you need to make cutting tips similar to those used on concrete crowns. Their production requires hardened steel. You can use a sewing machine shaft or something similar.Before use, make sure that the shaft is completely hardened. To do this, a small piece is cut off from it. If the steel is homogeneous in cross-section without traces of carburization, then it can be used.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

The shaft needs to be ground into a block. It is important not to overheat the steel so as not to loosen it. When grooving, the shaft should be periodically cooled in water. One side of the bar is made with a bevel. Then it is cut into 4 pieces literally 5-10 mm each.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

Markings are made on the pipe for welding the teeth. Grooves are cut along it corresponding to the width of the soldering. Then the teeth are welded.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

To position a homemade crown when drilling, if it is large, you need to cut a circle from a board, plywood or chipboard equal to its internal diameter. It can be made with a jigsaw. Then the circle is screwed to the drilling site with several self-tapping screws. A crown is installed on top of it, clamped with a bolt in the drill chuck. The limiter will allow you to assign a hole. Having gone deeper a few centimeters, the circle can be removed if it is in the way.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

A homemade crown may drill worse than a purchased one, but the cost of its production is very low, so the tool is well worth attention. When using a 133 mm pipe as its base, it was possible to make a hole in a wooden wall for installing an exhaust fan without any problems. When making such large crowns, it is important not to make more than 4 teeth, since it will be difficult for the drill to rotate it.
How to make a crown of any size from a pipe

How to make a crown of any size from a pipe

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Comments (3)
  1. Leo Boniface
    #1 Leo Boniface Guests 20 May 2020 07:38
    8
    For handy people who have nothing to do. It's easier to buy.
  2. Guest Anatoly
    #2 Guest Anatoly Guests 20 May 2020 19:20
    8
    If you count all the expenses, then how would this homemade crown be more expensive than a purchased one...
    And the rest is very reminiscent of a recipe like “How to make pizza from leftover food in the refrigerator if you have nothing to eat for breakfast”: Take hard smoked sausage, mushrooms, pickled cucumbers, cheese, etc., etc.
    In this case it’s the same: i.e. I should have (suddenly) lying around at home an unnecessary pipe of the exact diameter that I need right now to make a crown... I should have a hardened shaft - also unnecessary...
    There should be tools like a welder (preferably a semi-automatic one with the ability to weld in at least CO2 - since welding stainless steel with a regular arc is a perversion...), a sharpener (which wouldn’t work in a city apartment...)
    Those. the author of this suggests: if I suddenly feel the urge to drill a hole using a crown, but I don’t have one, then I should rush like a hog to the garage (let’s say) and build something like the one described...
    So: if I really feel like it, I’ll first ask my friends if they might have something like this lying around; no - that means the Internet can help: where is this stuff found in local stores and when can they bring it if something happens...

    And this reminded me of “How to draw an owl”...
    1. Guest Yuri
      #3 Guest Yuri Guests 23 May 2020 17:02
      5
      For people like you, if you need to make a conditional passage in a wall of the required size once a year or even for your entire life, it will be easier to turn to people who know and have it, rather than involve your brains here. If you worked with this tool every day for many years Then you would feel the difference between a purchased crown and one made yourself from high-quality steels, plus, you would hesitate to buy it in a Chinese junk store, and even ours.