Crack on horn

13 posts2012live thread

Alessi FrancescoMon May 07, 2012 3:49 pm

Hello,the horn was flawed and cracked when I opened the bow (about 80 cm between the tips).The only reasonable thing to do is to replace the entire strip.Gluing the crack doesn't seem to me a good idea:it will need a sinew binding(ugly) and even if it holds,the horn will eventually crack in another spot,possibly ruining the bow.In the second pic are visible small signs of delamination:I had to pay more attention.What do you think?This was a potentially good bow...I'm not happy.

Francesco

http://i1207.photobucket.com/albums/bb4 ... 571sma.jpg
http://i1207.photobucket.com/albums/bb4 ... 574sma.jpg

jack farrellMon May 07, 2012 4:08 pm

Best to change.

How did the silk from Uzbekistan work out?

Alessi FrancescoMon May 07, 2012 4:21 pm

Hello Jack,you mean that is better to replace the strip?The silk is very nice,I made only one string and it seems to work well:it's the best natural fiber that I ever tried.Thank you again.I'm using dacron now.

Francesco

jack farrellMon May 07, 2012 10:09 pm

Francesco; Of course change the horn. Your bows are much too nice to risk ruining with a damaged horn. Be well.

scemdonmezTue May 08, 2012 10:09 am

Francesco,

Where is the crack , kasan or sal?

Alessi FrancescoTue May 08, 2012 10:12 am

Hello scemdonmez,the crack is at the end of sal,just before the kasan eye.

scemdonmezTue May 08, 2012 11:23 am

Im agree witk Jack, change the horn. Crack place is not good. Im sure bow will be OK.

Cem

Alessi FrancescoSun Jul 15, 2012 10:47 am

Fixed, but not finished yet.Only 70-71# @29", less than I was expecting: I reduced the amount of reflex during the glueing of the new horn strip so I had to reduce the reflex on the other limb as well (by heat).I think it'll pick up a few pounds over time...they usually do.Mass 318 grams so far.

Francesco

http://img580.imageshack.us/img580/5853 ... 26det2.jpg

scemdonmezMon Jul 16, 2012 12:40 pm

Good to see it works, congrats.
Cem

nwrob1Tue Jul 17, 2012 6:03 pm

Great to see you fixed it Francesco! How did you remove the horn??

Alessi FrancescoWed Jul 18, 2012 3:21 pm

I scraped/filed/rasped it away.

Francesco

nwrob1Sat Jul 28, 2012 2:49 pm

Alessi Francesco wrote:
I scraped/filed/rasped it away.

Are you able to re-groove the core?

Alessi FrancescoWed Aug 29, 2012 5:28 pm

I don't groove the surfaces, I just scratch lightly the wooden core lengthwise.
Francesco