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Destructo_d 11-29-2015 11:40 PM

cutting a rim in half question
 
I would like to cut a rim in half.. what I want to make is a half circle... I am going to make one of those tire rim fire pits.

With the fact that there is a hole in the middle, what would be the easiest way to measure and mark it so I can cut in in half... for that matter... How can I do it on any piece of pipe or other item that is round?

Thanks

digr 11-29-2015 11:56 PM

Just take a piece of emery cloth and rap it around and mark it. will be close enough in this case.

threepiece 11-30-2015 09:30 AM

1 Attachment(s)
Is this what you want?

milomilo 11-30-2015 09:35 AM

Quote:

Originally Posted by threepiece (Post 643137)
Is this what you want?

Simple solution.

toprecycler 11-30-2015 12:32 PM

1 Attachment(s)
I think he wants to cut it the other way.

Take a straight edge and hold one end down on the outer edge of the rim. Take a tape measure and measure across the center perpendicular and line the straight edge up at 1/2 of the diameter of the rim. (If the rim measures 16", then line the straight edge up at 8") Mark both sides of rim where straight edge is. Take a string with a nut slipped on and hold the string on the marks on the outer rim, and let the nut weigh down the string (provided the rim is laying flat on a level surface) and the string will show where to mark the rim at the center hole. Connect the marks the best you can and cut away.:)

dubby 11-30-2015 01:48 PM

That's what I thought as well, looking to find the diameter points...

Use a right angle:

http://www.mathopenref.com/constcirclecenter2.html

duckman903 11-30-2015 05:49 PM

Put it on the floor make a mark on rim roll for 1 rev. measure divide in half mark rim , cut done.

DeepSeaDynamo 11-30-2015 06:00 PM

How man bolt holes does the rim have? If its not 5 you can use the holes to line up a straight edge. There are many many ways to skin this cat.

digr 11-30-2015 07:12 PM

1 Attachment(s)
Use a square

Lew Hartswick 12-01-2015 07:29 AM

To just how many thousandths do you want to get this "Half"? :-)
...lew...


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