Re: [Harp-L] Help with Chromatic repair

[George Miklas <harmonicat@xxxxxxxxx>]

from http://plastics.dupont.com/plastics/pdflit/americas/delrin/H76836.pdf

Delrin Properties and Characteristics

The chemical composition, regular molecular- structure and high degree of
crystallinity result in a unique combination of outstanding characteristics
of Delrin® acetal resins not found in metals or most other plastics:

   -

   High mechanical strength and rigidity
    -

   Toughness and high resistance to repeated impacts
    -

   Long-term fatigue endurance
    -

   Excellent resistance to moisture, gasoline, solvents, and many other
   neutral chemicals
    -

   Excellent dimensional stability
    -

   Good resilience and resistance to creep
    -

   Natural lubricity
    -

   Wide end-use temperature range


On Friday, January 17, 2014, Music Cal <macaroni9999@xxxxxxxxx> wrote:

> Hi George
>
> Plastic replacement combs for a 10 holer? Fantastic! Please keep me
> informed.
>
> Hohner combs only?
>
> I don't know anything about delrin. What useful properties does it have as
> a comb material?
>
> MusiCal
>
>
> On Thu, Jan 16, 2014 at 1:36 PM, George Miklas <harmonicat@xxxxxxxxx<javascript:;>>
> wrote:
>
> > Rivet holes in wind savers: Have you replaced rivets with screws or
> > screws/nuts?  You should not need to punch holes for any other reason.
> >
> > Broken wood combs:  Everybody has a method of repairing wood chromatic
> > combs.  Or you can replace the comb with plastic.  Later this year, I
> > will to begin production of the Miklas Lifetime Comb to replace wood and
> > aluminum chromatic combs in 10, 12, 14, and 16 hole models.  Individually
> > milled from solid ABS, Delrin, or Acrylic, with threaded metal inserts so
> > that reed plates and cover plates can be removed individually. More
> > information will be made available as it develops on my website:
> > http://HarmonicaGallery.com/repair
> >
> > George
> >
> > On Thursday, January 16, 2014, harp <harp@xxxxxxxxx <javascript:;>>
> wrote:
> >
> > > Dear Harp-L,
> > >
> > > I have always played the diatonic harp, but have been curious about the
> > > chromatic.  I recently purchased a couple of older Hohner Chromonicas –
> > one
> > > is a 10-hole, and the other is a “super” 12 hole.  Both have wood
> combs,
> > > and both are in need of maintenance.  I regularly work on my diatonics,
> > but
> > > I have never had a chromatic before, so I am jumping right into the
> deep
> > > end of the swimming pool and am going to do some work on these to see
> if
> > I
> > > can make them fully functional.  But I need some help/parts.
> > >
> > > I have already cleaned them up some, and I have opened up the gap on
> some
> > > reeds that were choking and have “ironed out” a reed that had been
> bent.
> > >  100% better already, but I still have a long way to go.  Here are the
> > > issues where I could use some advice:
> > >
> > > -  Both harps have broken combs.  The Super has a vertical crack on the
> > > 10-hole that is between 1/16” and 1/8” wide.  This means that both the
> > > upper and lower reeds of hole 10 play regardless of where the slide is
> > > positioned.  The 10-hole Chromonica also has a vertical crack in the
> > comb,
> > > but it is not at all as bad, and it does not seem to leak enough air
> > > between the upper and lower chambers to affect how it plays.  Does
> anyone
> > > have any recommendations on repairing the comb?  I can think of several
> > > ways to go about it, but I thought I would ask the group first.
> > > -  Of course, the windsavers are shot.  Should I just buy the
> windsavers
> > > from Hohner (currently out of stock – anyone have some they would like
> to
> > > sell?)
> > > -  Any suggestions on how to punch rivet holes in the windsavers short
> of
> > > buying the $350 Hohner tool kit?
> > > -  Does anyone have some of the slide buffers (the little pieces of
> > > plastic tubing that cover the mouthpiece screws)?
> > >
> > > Thank you very much,
> > > Brad
> > >
> >
> >
> > --
> >
> >    - *GEORGE MIKLAS,* Harmonica Performing Artist and
> > Entertainer<http://harmonicagallery.com/>
> >
> >    - *THE HARMONICA WIZARD MARCH* by John Philip
> > Sousa<http://harmonicagallery.com/sousa>
> >
> >    - *HARMONICA REPAIR* Done Right by George<
> > http://harmonicagallery.com/repair>
> >    - *HOHNER <http://us.playhohner.com/>*
> > *HARMONICAS*<http://us.playhohner.com/>*...Just
> >    Breathe* <http://us.playhohner.com/>
> >    - *SPAH *- *S*ociety for the *P*reservation and *A*dvancement of the
> *H*
> >    armonica, <http://spah.org/>
> >       - *a non-profit, membership organization dedicated to serving the
> >       harmonica community. <http://spah.org/>*
> >
>


-- 

   - *GEORGE MIKLAS,* Harmonica Performing Artist and
Entertainer<http://harmonicagallery.com/>

   - *THE HARMONICA WIZARD MARCH* by John Philip
Sousa<http://harmonicagallery.com/sousa>

   - *HARMONICA REPAIR* Done Right by George<http://harmonicagallery.com/repair>
   - *HOHNER <http://us.playhohner.com/>*
*HARMONICAS*<http://us.playhohner.com/>*...Just
   Breathe* <http://us.playhohner.com/>
   - *SPAH *- *S*ociety for the *P*reservation and *A*dvancement of the *H*
   armonica, <http://spah.org/>
      - *a non-profit, membership organization dedicated to serving the
      harmonica community. <http://spah.org/>*