Thanks Steve.
I am inserting a dowel. Am just not sure of the size hanger bolt. 1/4 sounds right though, but with no experience, hey, how does one know?
This neck does have a rosewood laminate.
Thanks!
-Mark
| Official Luthiers Forum! http://www-.luthiersforum.com/forum/ |
|
| Using hanger bolts for neck attatchment http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=8465 |
Page 1 of 1 |
| Author: | Mark Tripp [ Fri Sep 15, 2006 6:44 am ] |
| Post subject: | |
Hey Gang: I'm gonna try hanger bolts for my next one. Was wondering what size would be most appropriate. 3/16 - 1/4? Just not sure. Anyone else using this method? -Mark |
|
| Author: | Steve Saville [ Fri Sep 15, 2006 7:30 am ] |
| Post subject: | |
#/16" scares me a bit, unless you have a laminate neck with hardwood in the center section. You might consider inserting a hardwood dowel to screw the hanger bolt into if you want a one piece neck. I'd go with the 1/4" either way. |
|
| Author: | Mark Tripp [ Fri Sep 15, 2006 7:35 am ] |
| Post subject: | |
Thanks Steve. I am inserting a dowel. Am just not sure of the size hanger bolt. 1/4 sounds right though, but with no experience, hey, how does one know? This neck does have a rosewood laminate.
Thanks! -Mark |
|
| Author: | Mario [ Fri Sep 15, 2006 11:45 am ] |
| Post subject: | |
1/4" works fine for me, but I'd also bet 3/16" would be enough.... |
|
| Author: | crazymanmichael [ Sat Sep 16, 2006 12:08 am ] |
| Post subject: | |
in this sort of application it isn't the size of bolt per se which is of importance but rather the depth of the thread which provides the grip. i would go along with mario and say use the 1/4". |
|
| Author: | Steve Saville [ Sat Sep 16, 2006 1:26 am ] |
| Post subject: | |
I do not know for sure about wood. I do know about metal. In metal the strength is much more about the thread height than the depth of the screw. In metal, after you have 4 complete threads in, there is little to no strength gained by going deeper. In other words, if the screw is in 4 revolutions, it is just as strong as if it were in 25 revolutions. The failure is in shear, that is why it is true. I used to design dental implants so I had to do these calculations. That was for stainless steel, but I suspect wood isn't much different. For screws, the important features for strength are the thread height and ensuring enough depth for the screws. If the hole is drilled with too large a diameter for these hanger bolts, strength will be significantly reduced - be carefull. In wood I would never recommend only 4 revolutions for maximum strength. The whole thread and wood combination is not as consistent in material or tolerances as metal screws. 3/16" would probably work, but the threads are not as tall as 1/4". Unless space is limited, I'd go with 1/4". |
|
| Author: | Roy O [ Sat Sep 16, 2006 2:50 am ] |
| Post subject: | |
Great post Steve. Thanks for the insight. |
|
| Author: | Mark Tripp [ Sat Sep 16, 2006 7:55 am ] |
| Post subject: | |
Excellent input folks! Thanks very much. I'm going with 1/4" -Mark |
|
| Page 1 of 1 | All times are UTC - 5 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|