Re: [Harp-L] Reed polishing
- To: David Pearce <harpdog123@xxxxxxx>
- Subject: Re: [Harp-L] Reed polishing
- From: Vern <jevern@xxxxxxx>
- Date: Sat, 27 Dec 2014 13:36:20 -0800
- Cc: harp-l@xxxxxxxxxx
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Short answer: Yes.
Long answer:
In general, fatigue cracks can occur at stress concentrations arising from abrupt changes of cross-section thickness. Polishing is intended to smooth out such changes. This is the weak rationale for the notion of polishing reeds.
Howeverââ..
...SS is very resistant to fatigue.
âto receive the benefit, you would need to polish BOTH SIDES of the reed. How do you propose to polish the undersides, particularly in a chromatic with windsavers?
âthe Seydel reeds are not very rough so there are not appreciable changes of cross section.
âIf polishing removes any material, you will lower the pitch.
âif polishing removes any material, you will change the stress distribution along the reed, possibly creating stress peaks and doing more harm than good.
âyou will never know whether or not the polishing extended reed life.
IMO, there is much to be lost and little to be gained.
For this reason, I donât bother to polish my Saxony reeds.
Vern
> On Dec 27, 2014, at 6:13 AM, David Pearce <harpdog123@xxxxxxx> wrote:
>
> I've read that polishing the rivet end of a seydel stainless steel reed could increase it's life. Is there any science behind this theory?
>
> All bests!
> David Pearce
>
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