centered on a tool

[tonythetuner]

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Hi,
Yes, your missing pin sizes are available through Renner..(I say this =
because we have them in the UK too.....Renner that is!).

The other problem you might have is a mix of metric and imperial pin =
sizes. This may in part explain the irregular jumps.I was just trying to =
confirm this, by looking in an engineering materials book which I have =
now mislaid answering the phone.
However, if you have one of these, you will also be able to see that =
there are "prefered" sizes. There is greater production of these guages =
than others, so they are often cheaper........At this point it then =
depends what makers and suppliers are using.

No. 22 is about the smallest size here at 1.2mm or 0.0475 thou. So the =
most common size when recentering is about 24.5=3D1.4mm. I use center =
pins rolled under a file for reaming...one whole size down from the size =
being fitted. Final over size being determined by "what I reckon the =
butt will stand without being weakened or broken" and can on occasion be =
size 26=3D1.55mm or 0.061thou.

I seem to recall someone managing to post a table of wire sizes, so the =
archives might be worth a look.
Warm regards
Tony Court.


  ----- Original Message -----=20
  From: Joe & Penny Goss=20
  To: pianotech@ptg.org ; caut@ptg.org=20
  Sent: Wednesday, August 22, 2001 12:25 AM
  Subject: centered on a tool


  Hi all,
  In measuring center pins I have discovered that my pins do not always =
increase  in increments of .001=20
  They go #18 is .046#18.5 is .047     #19 is .048     19.5 is 49     =
#20 is 50    # 20.5 is 51      # 21 is 52     #21.5 is 53    # 22 is 54.
  I do not have any 22.5  pins but presume that they are .055 becuase =
#23's are .056 and no #23.5 pins and wonder the size for the #24 pins =
are.059 No #24.5 and then #25 is .063 and no #25.5 and the last pin size =
26 is .066
  The break in size progression seems to be between size #23.5  and size =
#24
  Question 1. are my missing center pin sizes available?   #22.5,   23.5 =
and 24.5?
                   2. are these larger sizes used by many? {#22 and =
larger}
                   3.At what size do you deide to rebush rather than =
repin?
                   4. If larger accurate reamers were available would =
you think of using a larger pin size?
  Joe Goss
  imatunr@srvinet.com
  www.mothergoosetools.com

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