I need to use a 1/16 router bit to cut through a 1/2" piece of MDF. Is there a bit with a long enough shank that will allow me to do that or what are my options? I am curing small letters with a cnc machine and the 1/8" bit is too large and distorts the letters.

  • 1
    Can you change the CNC pathway to move the outline out 1/16"?
    – Graphus
    Oct 21 '17 at 6:40

Good luck not snapping the bit, which is the practical reason such bits are hard to find.

1/4" cutting length might allow (with proper registration) cutting from both sides (have to mirror the cutting file when flipped, of course.)

Looking (as I usually do, since supply is much better) for end mills, 1/16" end mill extra long brings up several options, including 1/2, 5/8. 3/4 and 0.95 inch cutting lengths.

1/16" router bit extra long does get some useful hits as well, including some with 1 or even 1.5 inch cutting length, but those (at least the ones I looked at) are pointy cones, not straight bits - if your software understands the shape, you'll break fewer bits, but still be able to detail the surface.

As far as I recall we are still not a shopping site, so I'll provide keywords but not links to products.

In either case, wear your safety glasses and expect to break some bits, or change the design/process to cut with a larger bit, or a laser, or something better suited - long skinny router bits (and endmills) do break in real life.

Making the small letters out of thinner material would be an obvious alteration towards success.

  • I am sure if you take shallow passes it will not break the bit. We have to make shallow passes here at the high school when we use our 1/16" bit. We never had a issue. But at the same time, a 1/16" bit so long, that have got to be a very easy thing to break.
    – Ljk2000
    Oct 25 '17 at 13:54

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.