Author Topic: Hide glue crack repair?  (Read 1757 times)

0 Members and 1 Guest are viewing this topic.

Offline sleek

  • Member
  • Posts: 6,619
Hide glue crack repair?
« on: April 28, 2020, 11:56:13 am »
Say you got a crack ( not a check or a splinter ) in the back, in a working section, 7 inches from the fade  and bends but not much. Let's say its on the edge and goes into the bow about 1/4 inch toward the center and stops. Is there any reason why hide glue wouldn't be a better choice than CA glue to fill that, and pull the wood back together?  I don't know what the difference is in tension strength between CA and hide glue, but I like how hide glue shrinks.

And I should add, this crack is not hypothetical. Its on my favorite bow, made of osage that I can not replace due to the conditions surrounding it, its sentimental.  I have shot this bow with the crack, it never made a sound, don't know why, when, or how it formed. I can only guess its because the osage is figured with birds eyes. For that reason I'd rather not back it.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #1 on: April 28, 2020, 11:59:39 am »
Here is the crack, its in the glare, left side, towards the bottom.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #2 on: April 28, 2020, 12:03:15 pm »
Here's another shot of it. Man I love how pretty that wood is.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline DC

  • Member
  • Posts: 10,386
Re: Hide glue crack repair?
« Reply #3 on: April 28, 2020, 12:43:56 pm »
I have to admit I was very impressed with hide glue with my horn bow but I'm not sure it would wick into a crack like that.

Offline mmattockx

  • Member
  • Posts: 825
Re: Hide glue crack repair?
« Reply #4 on: April 28, 2020, 12:55:02 pm »
Since it's your favourite bow and has sentimental value I would use a belt and suspenders approach to ensure it does not break, ever. I would wick thin CA into that crack then patch the area with sinew or flax fibres/linen. It stays traditional with natural materials and you can keep shooting the bow for years to come without the fear of an explosion playing on your mind.


Mark

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #5 on: April 28, 2020, 01:07:27 pm »
I have to admit I was very impressed with hide glue with my horn bow but I'm not sure it would wick into a crack like that.

I believe there is a way to thin hide glue further than just adding water. Perhaps ammonia or something to that affect. I got to look into it. I may put a heat lamp on it, brace is, and put a drop on it, never letting it cool until the crack is sure to be filled.


Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #6 on: April 28, 2020, 01:07:59 pm »
Since it's your favourite bow and has sentimental value I would use a belt and suspenders approach to ensure it does not break, ever. I would wick thin CA into that crack then patch the area with sinew or flax fibres/linen. It stays traditional with natural materials and you can keep shooting the bow for years to come without the fear of an explosion playing on your mind.


Mark

I'm considering something to that effect.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline DC

  • Member
  • Posts: 10,386
Re: Hide glue crack repair?
« Reply #7 on: April 28, 2020, 01:34:41 pm »
Alcohol is what was suggested in Adam's book.

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #8 on: April 28, 2020, 02:05:42 pm »
Alcohol is what was suggested in Adam's book.

Thanks, I will try that
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline Gordon

  • Member
  • Posts: 3,241
Re: Hide glue crack repair?
« Reply #9 on: April 28, 2020, 02:16:11 pm »
Filling the crack with glue will probably not do anything because unless you address what caused the crack, it will likely open up again.
Gordon

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #10 on: April 28, 2020, 02:36:30 pm »
Filling the crack with glue will probably not do anything because unless you address what caused the crack, it will likely open up again.

This is the tiller.  The edges are VERY rounded. The grain is all over, due to its figuring. The crack is about 9 inches above my hand.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #11 on: April 28, 2020, 02:43:19 pm »
The back is all over with undulations. Its possible I nicked it and didn't know it, causing it to crack before I went an finished the edges with a smoot radius.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #12 on: April 28, 2020, 02:49:11 pm »
I left ALL of its character in it, deflex and all. I MAY heat treat the cracked area a touch to stiffen it so it doesn't bend, that should reduce its strain. Of course, the rest of the limb will need to be adjusted to make up for that.
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others

Offline Gordon

  • Member
  • Posts: 3,241
Re: Hide glue crack repair?
« Reply #13 on: April 28, 2020, 03:17:08 pm »
As long as the crack stays on the edge you're probably safe doing nothing about it. You can wrap it if it bothers you.
Gordon

Offline sleek

  • Member
  • Posts: 6,619
Re: Hide glue crack repair?
« Reply #14 on: April 28, 2020, 03:25:28 pm »
Here is a sanded down view of it
Tread softly and carry a bent stick.

Dont seek your happiness through the approval of others