David Knights' Weblog

October 22, 2020

Micro drills

Filed under: Modeling — dknights @ 6:44 am
Tags: ,

Like most modelers, I have a set of micro drills, that runs from 61 thru 80.  However, in working on the Tamiya Mosquito, I found myself needing a slightly larger bit size.  Luckily, my local, well stocked hobby shop has them available individually all the way up to 51.  I got what I needed.  However it raised a question for me.  How large to the numbered bits go up to?  Anyone know?


  1. They go from 104 to 1 and then A to Z. Don’t know what they do after that, but an “E” is a 1/4″ so they probably just rely on the fractional sizes once they run out of letters.

    Comment by Jeff Groves — October 22, 2020 @ 9:24 am

  2. I did not know this. I doubt I’ll need anything larger than a 51, but it is good to know.

    Comment by dknights — October 22, 2020 @ 10:18 am

  3. I do know those bits that are larger diameter than 61 (with decreasing numbers) are tougher to find than usual 61 through 80 bits. I got a set of larger-than-61 bits from MicroMark but I suspect there are other sources.

    Comment by Steve Leee — October 22, 2020 @ 11:07 am

  4. I had never thought about looking at Micro Mark. I just got lucky that my LHS is well stocked.

    Comment by dknights — October 22, 2020 @ 12:36 pm

RSS feed for comments on this post.

Create a free website or blog at WordPress.com.

%d bloggers like this: