Source for # 20 drill bits

by Pramod Kotwal

Nov 29, 2023

I need to rivet some solid rivets 470AD-5-7. I plan to order them from Zenith for my 601 upgrade. They used to sell some good drill bits. I need # 20 drill bits, Zenith seems to have removed them from their online catalog. Any suggestions for a source for good # 20 drill bits ?

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  • up

    Shaun D

    I was having issues with my Zenith #20's making triangular holes, I bought a number 20 chucking reamer from Spruce and a 1-60 bit set from amazon. (drill a number 22 then ream it to 20). That gives me really perfect holes.

    If you just want numbered bits, the Drill America ones from Amazon have been great.

    It also seems like Titanium Nitride cuts better/cleaner than Cobalt, but I could just be crazy.

    Nov 30, 2023

    • up

      Carl Orton

      I bought a bunch from Brown Aircraft Tools in OKC. About 1/2 mi east of I-35. Easy for me to hop off the freeway when heading to KS. 

      Dec 24, 2023

      • up

        Joe Harrington

        I often buy drill bits from Pan American Tools. They make/sell good quality stuff.

        https://www.panamericantool.com/

        1

        Dec 30, 2023