Correct Depth for Threaded Inserts?

[TeleTim911]

Believe me, I've tried several times in getting these right. I'm just needing to know how deep do I need to drill for a threaded insert in my neck?

I'm scared to death of going through the neck and destroying it. (it's a one-piece maple, no fretboard).

I am currently at approx. 0.745" deep, and the inserts still won't seat to bottom.

Help, suggestions? Thank you so much!

[mlp-mx6]

Um, how long are your inserts?

[TeleTim911]

I just checked with calipers at 0.467".

[bluebilly]

What kind of drill bit are you using? For that you need to use a forstner bit.

[Crawfish]

If your holes are .7 deep, that should be plenty I would think.

Here's how I do inserts, hopefully it makes sense. I can get an actual measurement off my "marked" drill bit when I get home later if that would help.

When I did my first set of inserts, I took a stock wood screw and laid it next to the neck/body joint of a guitar with the neck bolted on. From that I could see how far the screw went into the neck. I marked the point where the screw would "enter" the neck with tape. This gave me a depth gauge, rudimentary, but a gauge nonetheless.

Then I transferred that measurement to the drill bit I was going to use - again with a Buckocaster-approved tape depth mark. Worked like a charm. I only use that bit for inserts now! I do double check the measurement each time I do inserts just to be absolutely sure it's still correct.

Like you, I shudder at the thought of drilling through the fingerboard!

A couple of tips: first, and most importantly, you should tap the hole. The inserts will thread into the neck much easier. I did my first inserts by just screwing the insert into the neck and it was very difficult.

Second, brass inserts will thread in much easier than stainless. I have stainless on 2 guitars and brass on a third and the brass went in very easily.

Third, be sure to use wax or other lubricant on the threads. This is a must.

Fourth, use a drill press if at all possible to line everything up square. I don't know how this can be done accurately without some sort of press or jig to line up the drill and the tap.

Good luck. Once you've done one successfully, you'll have more confidence.

-Kevin

[TeleTim911]

Sorry nothing but standard bits...titanium type.

So, I guess I need a new bit? Any guess what size?