to divide a circle

[balts michelParticipant @baltsmichel94862]

device from scrap

[balts michelParticipant @baltsmichel94862]

hello, first: sorry for my english; I have made this device because I must divide a circle in five parts. Maybe you know something better, but for my job, it's good.

I let the pictures talking for me.

[EmgeeParticipant @emgee]

Hi Michel

As long as the divisional accuracy obtained suits your application and it works for you then it is OK, however there are many ways to hold a part and make divisions but not many as simple and low cost as your device.

 

Emgee

Edited By Emgee on 22/05/2023 19:54:07

[Paul LousickParticipant @paullousick59116]

Another option is a Rose Indexer (see Youtube video below) Commercial units are available but can be easily made by machining, 3D printing, etc. (also see previous posts on MEW)

**LINK**

[DC31kParticipant @dc31k]

Posted by Paul Lousick on 22/05/2023 23:34:05:

Another option is a Rose Indexer

Would you be able to point him to one that can do the _five_ divisions that he requires?

Your comment about 'easily made by machining' is rather chicken and egg in that you would need an indexer to make an indexer.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Emgee on 22/05/2023 19:53:26:

Hi Michel

As long as the divisional accuracy obtained suits your application and it works for you then it is OK, however there are many ways to hold a part and make divisions but not many as simple and low cost as your device.

.

Well-said, Emgee

+1 from me

MichaelG.

[DMBParticipant @dmb]

Depending upon the degree of accuracy required, you could use a simple plastic school device to set out the angle necessary. Divide 360° by say, 5 in this example, get 72° per side. Mark out carefully on piece of thick cardboard, plywood, hardboard, almost anything, then carefully cut out the wedge. Mill a small flat on work then rotate work to rest flat on your wedge and mill another flat. Keep going til jobbie done. Many, many more ways to achieve end result but above assumes a lack of better equipment and also very dependent upon the degree of accuracy required.

John

Edited By DMB on 23/05/2023 08:59:21

[Jouke van der VeenParticipant @joukevanderveen72935]

Hallo Michel,

You can construct an exact angle of 72 degrees using a compass and a ruler to draw straight lines. So, without using a protactor.

The analytical method to be followed is described on Internet.

Regards Jouke

[balts michelParticipant @baltsmichel94862]

Hi everybody, I am glad for all your answers and ideas…thank you very much

Michel

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