mpssrh Posted April 14, 2017 Share Posted April 14, 2017 I have to fit a new thumb safety to a full-size 1911. This will require removing some material in order to allow the safety to interface with the sear. (1) I am unsure about what file to use. Please help me. It is important that I do this correctly. I am planning to use to use the existing safety as a guide to where and how much metal to remove. (I can carry this to the gunsmith with no problem, but I would like to do this myself. If this is something that I should not attempt, please tell me.) (2) If you have advice about how best to go about this (i.e., technique), please share it with me. Thanks for any and all input. Link to comment Share on other sites More sharing options...
Bamboo Posted April 14, 2017 Share Posted April 14, 2017 Good info here: http://www.brazoscustom.com/magart/0601.htm I use smooth cut mill file for a lot of work, including fitting safeties. You can get smooth cut files in a lot of configurations. Check out the Nicholson file catalogue and you can buy from amazon or places like MSC or Zoro. Having some different stones also is nice for when you want to remove just a tiny amount of material and want a very smooth surface. Link to comment Share on other sites More sharing options...
Jakobi Posted April 27, 2017 Share Posted April 27, 2017 I have a cheap set of needle files that work well. Go slow and use a marking medium (I use a sharpie) to help keep track of where you're removing and need to remove material. Link to comment Share on other sites More sharing options...
TK66 Posted May 1, 2017 Share Posted May 1, 2017 Pretty much any small flat file will work. Just go slow, a couple extra strokes will can ruin your new safety. TK Link to comment Share on other sites More sharing options...
wanttolearn Posted May 7, 2017 Share Posted May 7, 2017 (edited) Some of my favorite all around files for little items such as the safety and the 1911 barrel lugs are a 4mm wide, 6 inch, #2 swiss file or a #2 or #4 pillar file. Lots of companies sell them. They're very handy and comfortable tools to use...and a lot nicer than the really cheap and thin harbor freight needle files. With quality files it seems like its easier to make nice parallel cuts without having the tool flex and twist. That said you could get by with the latter. Edited May 7, 2017 by wanttolearn Link to comment Share on other sites More sharing options...
lefty o Posted May 7, 2017 Share Posted May 7, 2017 a 6" #2 swiss cut pillar file with safe sides will do a great job on 90%+ of any hand file work you want to do on a pistol, and leaves an incredibly smooth cut. Link to comment Share on other sites More sharing options...
cyberiad Posted May 8, 2017 Share Posted May 8, 2017 I used a hammer squaring file to fit a single-sided thumb safety and it made what I thought was the perfect cut. I don't remember where I read about it originally. Link to comment Share on other sites More sharing options...
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