[TR] recommendations for using an insert

DAVID MASSEY dave1massey at cs.com
Thu Dec 3 14:21:17 MST 2020

 A drill guide as you describe is a good idea.  I always use a guide like that whenever I use a tap.  If you get a tap started crooked you will never get it straightened out.  I like to use a solid block of aluminum but I have also used square tubing.  Same principal applies when hand drilling.

Drilling a pilot hole is easier to get it centered.  Once the pilot hole is there the other drill bits will self-center.

-----Original Message-----
From: Sujit Roy <triumphstag at gmail.com>
To: Triumphs <triumphs at autox.team.net>
Sent: Thu, Dec 3, 2020 12:39 pm
Subject: [TR] recommendations for using an insert

What is the best way to drill a perpendicular hole for an insert?I'm using a 7/16-20 time sert. I need to drill a perpendicular hole in the captive nut. The dril I need to use is 29/64. Should I  start with drilling  smaller diameter holes and then end up with the 29/26?  Im thinking of drilling a perpendicular hole in a piece of wood in my drill press and then using that as a guide.Any recommendations please. The last time I used an insert, the hole wasn't perpendicular. 

Sujit Roy
Cupertino, California

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