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'Grooved or tubular file'? Does such a thing exist?


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Hi folks!

 

One of the challenges I often come up against when making kits is how to deal with tubular surfaces especially where they have been attached to the sprue. I've got pretty much every type of file and sander that 'I' could find at least and while some are thin or curved or narrow I've yet to find one that is concave or like the interior of a tube to make sanding stubs on tubular parts without damaging the tubular profile easier. Just wondering if any fellow BM'ers have come across any kind of tool that might fit the description above?

 

Cheers

 

Nocool

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I put "concave files" into Bing and it came straight up with a Diamond Guitar Fret Crowning file.  Not cheap but seems to be what you are looking for.  I didn't look any further for alternatives.

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I take you're looking for something that won't flat spot anything tubular?

I've got one of these 

https://www.hmhobbies.co.uk/precision-chamfering-tool-r-boko-v2-shimomura-alec.html

Sand the part lightly and then give it a couple of swipes with one of these to restore it.

Heres a couple of types from a uk seller.

https://www.ebay.co.uk/itm/254563243305?epid=14028912781&hash=item3b4526d529:g:0PwAAOSwnFZXVJM2

https://www.ebay.co.uk/itm/254563248347?epid=20029000687&hash=item3b4526e8db:g:dFoAAOSwbERejNj5

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You can use the edge of a concave curved blade to adze the material off, or a Flex-I-file, or one of those shield-shaped metal scrapers that have lots of different curved shapes cut into them. Lots of options really, once you know what to call them ;) 

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35 minutes ago, tank152 said:

I take you're looking for something that won't flat spot anything tubular?

I've got one of these 

https://www.hmhobbies.co.uk/precision-chamfering-tool-r-boko-v2-shimomura-alec.html

Sand the part lightly and then give it a couple of swipes with one of these to restore it.

Heres a couple of types from a uk seller.

https://www.ebay.co.uk/itm/254563243305?epid=14028912781&hash=item3b4526d529:g:0PwAAOSwnFZXVJM2

https://www.ebay.co.uk/itm/254563248347?epid=20029000687&hash=item3b4526e8db:g:dFoAAOSwbERejNj5

I saw that tool a short while ago--it looked quite good. I'll think more on this...

 

I've learned to use an equaling file to remove the high spots--as one would use a plane. I then wrap an abrasive pad around the curve to keep the rounded shape.

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