"Machining" steel ends

[GrahamRounce]

Hi again - I've found that a bench belt sander with a 40-grit belt is quite good for cleaning and squaring the ends of steel bars up to say 10x10mm, but it's sometimes not easy keeping the bar perpendicular, even by using a hole in some aluminium block to hold it.
What I'd like is a metal file like a sanding disc, that's faster and more durable, and more easily controllable.
Any suggestions, thanks!

 

[Agent_zed]

If you want a diy solution you could use a windscreen wiper motor to make a reciprocal file. I've seen it done a lot to make powered hacksaws so not much difference to make it hold a file. With a perpendicular L shaped bed to hold the steel it should be able to file it square.