[pianotech] pinblock Question

[John Ross]

Thanks Ron,
I had been wondering how many thou. smaller for the first pass.
As I said previously, I had always used a stream of air from the compressor.
Sounds like your way is more forgiving if the speed of feed changes.
Any recommendation, on the speed of the drill press?
John Ross
Windsor, Nova Scotia

----- Original Message ----- 
From: "Ron Nossaman" <rnossaman at cox.net>
To: <pianotech at ptg.org>
Sent: Tuesday, September 01, 2009 7:28 PM
Subject: Re: [pianotech] pinblock Question


John Ross wrote:

> *Other question is, I am going to be using #1 pins, and want to use 'the
> Nossaman' system of double drilling, rather than using the air stream to
> cool the bit.*
> *What size for the first and second passes?*
> *John Ross*
> *Windsor, Nova Scotia.*


Drill the first pass about 0.015" smaller than the second
pass. Drill the second pass to the size that gives you a
torque level you like in the block you use.
Ron N