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 Sound Post stock diameter

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RichJ

United States
183 posts
since 8/6/13

08/11/2017 11:20:36 View RichJ's MP3 Archive View RichJ's Photo Albums Reply with Quote

While sound posts are still on my mind from a recent FH post, and also ordering some sound post stock, wondering what most of you guys consider an appropriate diameter.

Checked with International Violin and they suggest 6.2 mm for a 4/4 and 5.6 mm for a 3/4.

Any thoughts?

Notice - I'm not asking how sound post diameter affects sound, but this will likely get into the thread pretty quick.

captainhook

United States
767 posts since 6/26/07

08/11/2017 14:43:03 View captainhook's Photo Albums Reply with Quote

The 6.2 is pretty middle-of-the-road. For a 3/4, 5.6 might be slightly small but is unlikely to hurt the typical 3/4. Probably the result of some common machining capability. I've made several 3/4s and used 6 mm posts. Worked fine for my model. I make my own posts, sometimes from the front scraps.


Edited by - captainhook on 08/11/2017 14:44:09

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RichJ

United States
183 posts since 8/6/13

08/11/2017 15:14:37View RichJ's MP3 Archive View RichJ's Photo Albums Reply with Quote

quote:
Originally posted by captainhook
 

The 6.2 is pretty middle-of-the-road. For a 3/4, 5.6 might be slightly small but is unlikely to hurt the typical 3/4. Probably the result of some common machining capability. I've made several 3/4s and used 6 mm posts. Worked fine for my model. I make my own posts, sometimes from the front scraps.


I've thought of making my own. How difficult is it?

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kjb

United States
446 posts since 6/8/13

08/12/2017 04:54:40 View kjb's Photo Albums Reply with Quote

make a jig , you can look up I would think , not that hard. 

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RichJ

United States
183 posts since 8/6/13

08/12/2017 08:27:05View RichJ's MP3 Archive View RichJ's Photo Albums Reply with Quote

What I really meant to say was: Is it worth the time and effort when you can purchase a years supply for a few bucks?


Edited by - RichJ on 08/12/2017 08:27:43

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Forest

United States
70 posts since 11/5/11

08/12/2017 08:40:17View Forest's MP3 Archive View Forest's Photo Albums View Forest's Blog Reply with Quote

I ordered these sound posts on Ebay from China, they are .249-.250 inch in diameter.

http://www.ebay.com/itm/5pcs-great-spruce-violin-soundpost-high-quality-violin-soud-post-/201991778106?hash=item2f07a5ef3a:g:AXsAAOSwd4tUHTse

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RichJ

United States
183 posts since 8/6/13

08/12/2017 09:22:28View RichJ's MP3 Archive View RichJ's Photo Albums Reply with Quote

quote:
Originally posted by Forest
 

I ordered these sound posts on Ebay from China, they are .249-.250 inch in diameter.

http://www.ebay.com/itm/5pcs-great-spruce-violin-soundpost-high-quality-violin-soud-post-/201991778106?hash=item2f07a5ef3a:g:AXsAAOSwd4tUHTse


Yikes! 50 posts for a buck and free shipping.

Is 6.3 mm a bit on the thick side?

 

At that price it's got to be worth a shot but arn't they a bit on the "thick" side?.

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TuneWeaver

United States
5848 posts since 3/19/09

08/12/2017 13:30:19View TuneWeaver's MP3 Archive View TuneWeaver's Photo Albums View TuneWeaver's Blog Reply with Quote

I don't know much about sound posts, but isn't the fit more important then the diameter?

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amwildman

United States
1957 posts since 12/23/07

08/12/2017 14:37:39View amwildman's MP3 Archive Reply with Quote

I agree, Lee.  OP is overthinking things.  6.2 from IVC is only .1mm off from the other link.  1/10th of a mm is incredibly small, and is unlikely to affect anything.  Wood and fit are much more likely to affect tone than a miniscule bit of extra wood.  

 

head of a pin = 1-2mm.  So we're talking about literally 1/10-1/20 of a pinhead.  Irrelevant for most fiddles and players. Maybe all fiddles and players.

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captainhook

United States
767 posts since 6/26/07

08/12/2017 15:23:19 View captainhook's Photo Albums Reply with Quote

quote:
Originally posted by RichJ
 

What I really meant to say was: Is it worth the time and effort when you can purchase a years supply for a few bucks?


Probably not, for you at least. I always have lots of scrap spruce and prefer to have posts that are split out both directions so that I know the grain is truly straight. Does it really matter? Maybe only to me and a few others. I also like to use finer grain posts than you can buy. There are several approaches to making them but for just one planing is probably quickest.

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