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Small round bar end finisher.

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Alyn Foundry:
Good morning.

A year or so ago I managed to find on eBay listings, mainly from outside the UK, of a simple tool to create a clean looking half round end to a rod. Iím now needing such a tool to quickly clean up the sawn ends of 4 mm CZ 121 Brass rod. I would ideally like to have the tool rotating and to be able to hand finish the rods against it. Despite many tries of different descriptions in their search engine, the ď D cup cutter ď was highly illuminating  :o Iíve drawn a blank, can anyone help please?

Whilst on the subject of help Iím also looking for 1/4Ē Whitworth half chamfered Steel nuts.

Cheers Graham.

Jo:
I am assuming you are thinking of something like an electric pencil sharpener where you poke the pencil/bar in and it munches the end.

I wouldn't want to be hanging on to the end  :noidea:

Jo

Alyn Foundry:

--- Quote from: Jo on August 24, 2021, 12:02:13 PM ---I am assuming you are thinking of something like an electric pencil sharpener where you poke the pencil/bar in and it munches the end.

I wouldn't want to be hanging on to the end  :noidea:

Jo

--- End quote ---

Hi Jo.

Well, yes and no. The tools I found, their name escapes me at this moment were effectively an internal Burr, semicircular and available in different diameters. Lots of USA listings.

Cheers Graham.

Jasonb:
plenty of old nuts here https://historicthreads.co.uk/nuts-7-c.asp

I've seen the rounding tools used to finish off rivits to look like stays.

Jasonb:
Cup burrs

https://www.eternaltools.com/cup-burrs

Though 4mm seem hard to find.

Have you thought of using a 2mm rounding over milling or router bit held in the toolpost and just using it as a form tool against work in the lathe?

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