[pianotech] Of Chisels

[William Monroe]

And, just so you don't think I'm a closet Nossaman, I got the idea for the
jig after taking a class with Hand Plane Wizard, Christopher Schwarz (author
of many books, including "Handplane Essentials," and "Workbenches").  He
uses one and I was allowed to use it (along with some other really nice
tools) and I really liked the idea, so I made one.

William R. Monroe


On Mon, Oct 11, 2010 at 7:02 PM, William Monroe <bill at a440piano.net> wrote:

> Hi David,
>
> On my jig with my holder, the distances for plane irons are:
> 20 degree      70mm
> 25 degree      52mm
> 30 degree      39mm
> 35 degree      29mm
>
> Chisels:
> 20 degree      54mm
> 25 degree      40mm
> 30 degree      30mm
> 35 degree      22mm
> 45 degree      11mm
>
>
> Having listed all that, the important thing to consider is that the
> distances for a specific angle are determined both by your particular set of
> chisels/plane irons, and by your holder.  A thicker or thinner blade will
> change the distances, as will the position on the holder.  I determined my
> angle by placing my tools in my holder, zeroing out the Beall Tool Tilt Box
> on the bench, and then reading the angle with the Tilt Box on the tool,
> adjusting as necessary to get a specific degree bevel for the tool.
>
> It is not strictly important that your stops be perfectly parallel to the
> edge of the jig that mates with the tool holder.  It's just a stop, and
> provided you register your blade "always on the left" or "always on the
> right" it won't matter that it's not square; I did do my best to make them
> square on my jig, however, because that's the way I wanted it.
>
> Another important consideration is that whether you sharpen a primary bevel
> at 25 degrees or 26 degrees, or 25.327degrees is not important at all.  What
> is important is that once you make the jig, you have a simple method for
> duplicating a bevel on your tools.
>
> And because the request was made, here's another image that shows the angle
> markings on both sides.  They are the same as those listed above.
>
> William R. Monroe
>
>
> On Mon, Oct 11, 2010 at 9:07 AM, Brown, David <dcbrown at mail.smu.edu>wrote:
>
>> William-
>>
>> I use that homing guide as well. Can you tell us the distances on the jig
>> for the different angles?
>>
>> Many thanks-
>>
>> D
>> --
>> David C. Brown RPT
>> Piano Technician
>> Division of Music
>> Meadows School of the Arts
>> Southern Methodist University
>> Dallas Texas 1-214-768-3976
>> dcbrown at smu.edu
>>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101011/157f150e/attachment.htm>