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ROF Drum Head
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Registered: 04-2007
Location: Hamilton, MT
Posts: 3785
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posticon COB repair from Bruce!


This is Bruce's tip on fixing dents in COB shells. Jackemoticon

To get the best results tapping out the inward bulge is to take the drum apart right down to the bare shell. Then on a flat surface covered with a double layer of cotton tee shirt type material, lay the shell down and tap just where the shell is supported. Tap lightly, these COB shells are soft, check it every time you tap, take your time.

With a oval face (] hard rubber mallet, the oval has to be slight , like the curvature of a coffee cup, I've straightened some pretty bad COBs and had good success.

Bruce



Last edited by musicbybj, 10/22/2007, 2:00 pm


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"You are never too old to set another goal or to dream a new dream" Les Brown
10/22/2007, 1:59 pm Link to this post Send Email to musicbybj   Send PM to musicbybj
 
backintoit3 Profile
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Location: Harrisburg, PA.
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posticon Re: COB repair from Bruce!


I gotta tell you guys, THIS [sign in to see URL] took me awhile and it wasn't a COB dyna, but it was a chrome snare, and you can't even tell it was dented [sign in to see URL] I was thinking of Bruce the whole [sign in to see URL]'
2/15/2008, 7:03 pm Link to this post Send Email to backintoit3   Send PM to backintoit3
 
tommykat1 Profile
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Registered: 06-2007
Location: Portland, Oregon
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Re: COB repair from Bruce!


Funny. This got me thinking. My COB Dyna has been with me since new in 1967. From Connecticut to Seattle to Portland. In and out of vans, cars and trucks. Never in a case until put in storage in 1983. Ever. To gigs and back home, and to gigs again, wrapped in a towel--no joke.

I thought it was perfect--and it nearly is. But sure enough, it has a dent under one lug. Barely perceptible, but any of you guys--especially Ploughman--would notice it in an instant.

So I'm gonna do it! I'm going to tear it down and do the mallet trick. The last time it was apart was when I put heads on it. In 1979. Jeez. It's been almost 30 years. I've cleaned it with a damp cloth once or twice, but she's never been polished, and she still looks darn good.

I have no other possession made of chrome that looks as nice as that piece of art--this time machine--from Dayton Ohio.
2/16/2008, 12:17 am Link to this post Send Email to tommykat1   Send PM to tommykat1
 
troutstudio Profile
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Registered: 09-2007
Location: Sydney, Australia
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Re: COB repair from Bruce!


quote:

tommykat1 wrote:
I have no other possession made of chrome that looks as nice as that piece of art--this time machine--from Dayton Ohio.



I showed a colleague a picture on the web of my snare collection. She immediately picked out the COB Dyna and said "How cool! It looks like Dennis Hopper should be riding it!"

I concur

 emoticon

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Regards,

PK.
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rogerwdowns Profile
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Re: COB repair from Bruce!


This works!!! I had to sand(on a belt sander) my rubber mallet on one side to give a curve. Worked like a [sign in to see URL] only it were a Rogers not a Slingy. LOL emoticon
3/17/2008, 3:14 pm Link to this post Send Email to rogerwdowns   Send PM to rogerwdowns
 
empiredrum Profile
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Registered: 12-2008
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Re: COB repair from Bruce!


Metalsmiths, silversmiths, and jewelers use rawhide hammers to do the job of bumping out dents. Rawhide hammers work well because they don't stretch the metal at all at the point of impact, and also don't work-harden the metal either. Rubber mallets are similar, but if you want to do it with a rawhide mallet, you can find them at any jewelry supply store or online. The idea of doing it on t-shirt material on a flat surface is a good one. Metalworkers would do it on a leather sandbag, and would strike very lightly, as brass is very soft.
1/30/2009, 8:42 am Link to this post Send Email to empiredrum   Send PM to empiredrum Yahoo
 


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