Out Of Round

wildbill

Platinum Member
Taking bets and open to ideas.

I noticed when putting a reso head on a bass drum that it was an extremely tight fit and I had to work it on a little at a time.
Used a rubber hammer to get it back off again. I've never had an out of round drum before, but thought I should measure it. Sure enough. :(

I think I came up with a solution, but am going to leave it for a day or two. I used tie down straps.
Started with one at the top last night and put another two on this morning.
Got them as tight as I dared without thinking I'd crack or collapse the wood.
Even if it works, I'm not sure it'll be a permanent solution.

Only thing I can think of is that someone left it sit without a reso head or hoop, and it deformed over time.

Anyone else dealt with this?
 
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KamaK

Platinum Member
With guitar necks.....

Make sure wood is at proper moister content.
Loosen truss rod
Clamp into desired shape
Warm to 200F for a duration.
Turn off heat
Leave Overnight - 24h
Unclamp and measure the change


With guitars, the heat is applied locally with a pad or lamp. I assume you'd need a big oven for drums, and wouldn't be able to leave the wrap on them.

Also note, with guitars, this is a last ditch effort before having the fretboard removed and neck re-planed . It doesn't always work, doesn't always last when it works, and in some cases makes things worse despite performing the procedure perfectly.

Anyone re-true a drum before?
 

C.M. Jones

Well-known member
Though various strategies are bandied about for restoring out-of-round drums, the prognosis is always grim to me. A warped shell is deceased in my schema. I'd consign it to the flames. Fortunately, I've never had to address this issue with my own equipment.
 

MrInsanePolack

Platinum Member
Internal truss rods. Sort of like the flobeam on some metal snares. You can either use one to pull in the wide part, one to push out the narrow spot, or both. If designed like an aerofoil, they should leave no discernable sonic difference being in there. You can attach them at lug mounting points.
 

IBitePrettyHard

Senior Member
Did you measure the diameters again with the straps in place? I'd be interesting to know. Then measure again when you release the straps.

If the drum doesn't stay in round, maybe you could leave the straps on permanently? :unsure:
 

wildbill

Platinum Member
Yep - I measured with the straps on and it looks good, and the head seems to go on like it should.
I'm not sure what's considered 'real bad' out of round, but this one was somewhere between 1/8 and 1/4 inch.
I'm not going to rush it though, I've got other sets to play. I'll probably leave it sit over the weekend.

It wouldn't be so bad, but the shell is not undersized at all.
It seems to be almost exactly the same size as the inside of the head hoop - 22" It's got a wrap on it too.
If it was undersized by 1/16 or 1/8" or so, there wouldn't be a problem.

I only paid $99 for the three pc. kit, and I could get the head on before I started with this, so I'm not real worried about it.
I got the head on by starting it in one spot, then working around it hitting it down with my fist. o_O

I did buy an Emad batter head for it though that cost almost half of what the whole set cost.
:ROFLMAO:
 

Mr Farkle

Well-known member
I have a MIJ snare that's out of round (or maybe just slightly large, I didn't bother to measure it) but I also had to hammer off a standard head. Now I just use the slightly oversized heads that are made for vintage drums. I don't think it matters at all that the drum is out of round, within reason.

Ambassador Coated Classic Fit
Aquarian American Vintage
 

wildbill

Platinum Member
I have a MIJ snare that's out of round (or maybe just slightly large, I didn't bother to measure it) but I also had to hammer off a standard head. Now I just use the slightly oversized heads that are made for vintage drums. I don't think it matters at all that the drum is out of round, within reason.

Ambassador Coated Classic Fit
Aquarian American Vintage

Thanks - that's good to know.
I have heard of oversized heads, but I think most drums are made a little undersized nowadays to avoid those problems.
I'd be upset if this was an expensive drum.

Kids - don't leave your bass drums sitting around with the head and hoop off. :p
 
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mrfingers

Senior Member
I had the same problem with a ‘63 Slingerland bass, minus the hammering the head part. I used a couple of shims: thin strips of foam core board on the “wide” side To make the heads tight and seal the drum. You can’t tell by the sound what’s been done. I figure it’s a little vented.
 

GetAgrippa

Platinum Member
I wonder if placing it in a moist heated sauna would help it reshape it or steam it to reshape would definitely work but I don’t know what it might do to a ply shell. Inventive way to fix it-I guess you could add internal structural support but I d try steaming gently and slowly .Maybe have a thin aluminum collar made for inside circumference you could screw it to hold then take off straps?
 
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KamaK

Platinum Member
I wonder if placing it in a moist heated sauna would help it reshape it or steam it to reshape would definitely work but I don’t know what it might do to a ply shell.

For most wood, the magic begins to happen at ~200F. Steaming is indiscriminate, and you're just as likely to end up with ply/seam separation as you are a true/round shell.

That said, if you have a sauna that will do 200F @ 50% humidity, you should probably have it looked at by a qualified technician immediately. ;-)
 

wildbill

Platinum Member
I'd worry more if riding an out of round carrousel, or worse yet one of those damned tilt-a-whirls at the state fair.

:ROFLMAO:

Maybe it's nothing to worry about - until you can't get a head on it anymore, even with a hammer. :p

Like I said, it's the first time I've run across it, so maybe it's an over-reaction. IDK

I got an old Slingerland with no reso head, was 1/4" out of round. Muscled a head on it and just played it, sounded fine. Couple of years later took it apart for rewrapping, it was perfect.

Update - got antsy and decided two days was enough. Measured it with the tie downs on and it seemed good.
Took them off and the drum must have sprung back to its distorted shape. Got the head on, and it did seem to go a little easier.

I decided to take LarryJ's approach. Use it as is, and see if it changes a couple years down the line.
 
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TK-421

Senior Member
Though various strategies are bandied about for restoring out-of-round drums, the prognosis is always grim to me. A warped shell is deceased in my schema. I'd consign it to the flames. Fortunately, I've never had to address this issue with my own equipment.
I have to ask—do you speak this way in person, or do you only write like this?
If you do speak this way, I envision it sounding something like this...

 

C.M. Jones

Well-known member
I have to ask—do you speak this way in person, or do you only write like this?
If you do speak this way, I envision it sounding something like this...


Ha! I'm afraid I'm not even a fraction that sinister or dramatic. As for the way I write being in line with the way I speak, I'd say the two are quite similar. I don't compose drafts of my forum posts or resort to thesauruses along the way. I write what comes to mind, mostly in a stream-of-consciousness fashion. I've been an avid reader since early childhood. Words have always come easily.
 

Stroman

Platinum Member
I spoke with Ronn Dunnett on the phone regarding out-of-roundness. He felt it was a non-issue, if a head will go on, because the head basically pulls the drum back into round.
 

EhhSoCheap

Member
Ha! I'm afraid I'm not even a fraction that sinister or dramatic. As for the way I write being in line with the way I speak, I'd say the two are quite similar. I don't compose drafts of my forum posts or resort to thesauruses along the way. I write what comes to mind, mostly in a stream-of-consciousness fashion. I've been an avid reader since early childhood. Words have always come easily.

May we have access to your full profile?
 
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