Semi-cylinder cut in dowel

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I’d like to make some simple but modern looking curtain poles for all the windows in our house. I’ve seen these one but can’t think how I could accurately make the semi-cylinder shape in the bracket dowel to hold the curtain rail dowel.

I’m thinking a forstner drill bit and a jig would probably do it but that doesn’t seem like the way to do it properly and neatly.

Any one know the answer or can point to a resource? I’m proud of the built-in wardrobes I’ve just finished but for all intents and purposes I’m a novice.
 
I’ve seen these one...

I may be over-reading, but that seems to suggest you are referring to a photograph that for some reason has not been included in your post.

What is possible now depends greatly on what your material looks like now. If it is a large lump of wood, drill a hole in it and remove everything surrounding that hole such that only half of it remains.

If the parts are finished-turned with circular symmetry looking square to the wall, are they parallel or tapered? Tapered makes the job more difficult. Perhaps mounting the item to a ridgid block, coping saw out the bulk and then use a bobbin sander with a jig/fence to finish the shape.

The difficulty of the task can vary greatly depending on where you do it in the production process.
 
I may be over-reading, but that seems to suggest you are referring to a photograph that for some reason has not been included in your post.

What is possible now depends greatly on what your material looks like now. If it is a large lump of wood, drill a hole in it and remove everything surrounding that hole such that only half of it remains.

If the parts are finished-turned with circular symmetry looking square to the wall, are they parallel or tapered? Tapered makes the job more difficult. Perhaps mounting the item to a ridgid block, coping saw out the bulk and then use a bobbin sander with a jig/fence to finish the shape.

The difficulty of the task can vary greatly depending on where you do it in the production process.

Apologies I thought the link and an image had been included. They should be available now.

I will buy the hardwood dowels as shown in the image but I want to achieve the semi-cylinder cut out on the wall bracket bit of dowel.

https://www.etsy.com/uk/listing/864...3elzE2x7IcAUwgL5o6lbXWiQPIv2Z0BRoCzH0QAvD_BwE
 

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Assuming you mean to end up with something like this.
1741091008823.png

Easiest way is to simply rasp/file it out.

Or take a block of wood and drill a hole in it for the dowel.
Then drill the hole in the block of wood (With the dowel in) so you can get it in the right space without the dowel spinning away.
So, basically like this, but with a bigger drill bit :)
1741091612667.png
 
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