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Any idea where to buy a square file 1/4" x 1/4"??

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Adam Harris28/08/2019 17:29:12
451 forum posts
19 photos

Can anyone steer me in the right direction to buy square files (straight, not tapered), in particular I would like to buy a 1/4" to help me finish off a keyway?

mechman4828/08/2019 20:47:07
2638 forum posts
408 photos

Surely any well known DIY store will have them, maybe your 'local' hardware store too.


JasonB28/08/2019 20:52:39
17874 forum posts
1954 photos
1 articles

Don't think I have seen square files that size without a taper, probably better off with a Pillar file.

Edited By JasonB on 29/08/2019 07:56:01

David George 129/08/2019 07:26:38
1197 forum posts
409 photos

Hi Adam have a look at Vallorbe files they make any size and shape.


roy entwistle29/08/2019 08:36:17
1153 forum posts

I would use a three square file ( triangular ) rather than a square


Neil Wyatt29/08/2019 09:31:17
17740 forum posts
697 photos
77 articles

Use a 1/4" thick rectangular file, you only need to put the edge in the slot. That's what I do.


Gary Wooding29/08/2019 12:25:14
670 forum posts
169 photos

+1 for a 3-square file - it makes sharper corners.

Ian P29/08/2019 12:45:14
2354 forum posts
98 photos
Posted by Gary Wooding on 29/08/2019 12:25:14:

+1 for a 3-square file - it makes sharper corners.

That not really true all the time. I have square and rectangular hand files with sharper corners than all the triangular files that I have.

It only in theory that triangular are better for square holes.

Ian P

roy entwistle29/08/2019 15:52:42
1153 forum posts

Ian P Not if you grind safe edges on them


Maurice29/08/2019 16:37:31
461 forum posts
50 photos

It has been pointed out in the past, in M.E. , that square files are not in fact truely square. They were made like this to make it easier to file a triangular groove into a flat surface by using alternate corners; one corner would be cutting near the bottom of the groove, turn through ninety degrees and it cuts near the surface. I examined one of my files at the time, and the corners of that were definitely not right angles. I have no idea if this practice varied with size of the file, or if it is still done.


Neil Wyatt29/08/2019 17:00:24
17740 forum posts
697 photos
77 articles

As I say - use a flat file. You can get a cheap one for a few quid and grind it down to fit in a bore (I've done this before) or put a safe edge on it.


Jonathan Maes31/08/2019 03:07:00
3 forum posts

This might sound odd but if you have a mill with a quill on it you can grind a HSS blank to use as a broach. You can get them 1/4" square and then your corners would be dead perfect.

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