Mark, You would need to strike the shaft very forcefully against something rather sharp-edged to create a nick that would affect the strength. Small surface dings in the resin won't harm it - you would need to create a pretty good crushed area to compromise the strength. I am not at all careful in handling my Faulk lever. I keep it in a sack to protect the wood of the handle, but that's all. Don Mannino ----- Original Message ----- From: "Mark Schecter" <mark at schecterpiano.com> To: "Pianotech" <pianotech at ptg.org> Sent: Saturday, September 06, 2008 12:48 PM Subject: Carbon fiber durability > Hi, all. > > Thinking about changing to a carbon fiber tuning lever, I'm wondering > about some concerns raised in the bicycle industry about CF's > vulnerability to impact damage. Specifically, when a CF tube is dinged or > crimped, its structural integrity, i.e. its strength and durability, are > compromised, and it's considered unrepairable. Of course, a bicycle crash > probably involves a lot higher forces than banging your tuning hammer > against a plate strut, but still, does anybody have any idea whether CF > hammers are vulnerable to dings, crushing, fatigue, or other kinds of > damage or forces likely to be sustained in our work? Has anybody had any > experience with the CF hammer they are using being damaged? Thanks. > > -Mark Schecter >
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