Previous in Forum: Materials name and percentage of each materials for SS 304L & 316L   Next in Forum: convention lathe machine job - machining time calculation or its formaula
Close
Close
Close
9 comments
Rate Comments: Nested
Participant

Join Date: Jul 2008
Posts: 4

Sprocket and Chain Mechanism For a Kettle Drum

07/24/2008 8:34 AM

NEEDED, expertise in sprockets and belt-chains to help me locate of the correct parts for making a tensioning device for a kettledrum (musical instrument). What I need is (10), 3inch sprockets of about 3" in diameter with an adequate amount of teeth, and a raised middle section that has an aprox .75inch (1cm) hole in the middle with tightening pins to fasten to the verticle tuning rod on the 10 lugs of the kettle drum.

I want to install the sprockets on the tuning rods, and with a compatible chain, go around the 35" drum diameter (aprox 75inches of chain peremeter). When I turn two of the rods with manual handles, I want the whole mechaism to tighten the rim over the kettle and change the skin which is mounted on the drum (tighter-high pitch, loosen lower pitch).

What I believe I need is:

10 sprockets (chrome or stainless steel aprox 3 inches), screw pins or bushings for tightening on the tuning rods already installed on the drum.

1 long chain to go around the drum that meet each sprocket installed on each tuning rod.

For a drummer this may be a little easier to understand. I would appreciate any help in location of the correct parts to purchase and any detailed info.

Thank you

jef

jefpren@yahoo.com

compatible chain

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
2
Guru

Join Date: Oct 2006
Location: New Jersey U.S.A.
Posts: 1114
Good Answers: 38
#1

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/24/2008 8:59 AM

Nice idea, but I play the drums and when I tune them up I always seem to have to adjust the tension of some lugs more and some less to get the pitch and timber I am looking for. It seems that the heads do not always stretch uniformly or maybe the lugs loosen up on some. Or maybe I just beat one side of the skins more than the others. This may be something to consider.

You'll probably need a small take up device to keep the chain tight or it may skip on the teeth and cause uneven adjustment all around.

Good luck with your project.

__________________
The last fight was my fault. My wife asked "What's on the TV?" I said "Dust!"
Register to Reply Good Answer (Score 2)
Participant

Join Date: Jul 2008
Posts: 4
#2

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/24/2008 2:26 PM

I am sure it is possible to do since there are models on the market ; IE:langpercussion.com and pctimpani.com I just need to get the correct parts!!!

Register to Reply
Guru

Join Date: Oct 2006
Location: New Jersey U.S.A.
Posts: 1114
Good Answers: 38
#3
In reply to #2

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/24/2008 3:00 PM

I'm sure it will. I was just mentioning to you the possible problems you might encounter. I know the adjustments on a timpani work differently. I just see the tensioning on the chain to be critical so that all screws are turned evenly to keep the chain from skipping on the teeth.

Again Good Luck! I'd like to see your final work when accomplished.

__________________
The last fight was my fault. My wife asked "What's on the TV?" I said "Dust!"
Register to Reply Score 1 for Good Answer
Guru
Australia - Member - New Member

Join Date: Feb 2008
Location: Australia
Posts: 2181
Good Answers: 255
#4

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/24/2008 11:50 PM

I've seen good versions of this using pushbike rear sprokets and chain. (Co-ordinating multiple adjustments using a common chan and multiple sprokets.) The chain is very easy for the layman to join, the sprokets are mass produced and readily available with the necessary hole in the centre and probably strong enough to take the load.

The sprokets can be obtained in various finishes including som etrendy anodised colours.

Good luck.

__________________
Just an Engineer from the land down under.
Register to Reply
Participant

Join Date: Jul 2008
Posts: 4
#7
In reply to #4

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/25/2008 7:10 AM

Thanks for your in sight . Do you have any specific suppliers/shops etc that could get me the sprockets that I could tighten to a 1cm/.75 inch tuning rods, and the correct type of chain that could go around the kettle and meet each sprocket? Thanks Jefpren

Register to Reply
2
Guru

Join Date: Jul 2008
Posts: 927
Good Answers: 56
#5

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/25/2008 1:30 AM

What you are describing is clear enouigh. It is, however, a lot more complicated than a foot pedel pulling a vertical tensioning rod and spiders.

Admidtedly it would be faster than the more typical frantic effort to wrench 10 manual adjusters to a different pitch before your next note. (I watch you guys play!)

I would be more inclined to use nylon gears, a toothed belt and an adjustable idler to adjust tension. It's lighter, likely less expensive and you have many more options to choose from.

__________________
"Both the revolutionary and the creative individual are perpetual juveniles. The revolutionary does not grow up because he cannot grow, while the creative individual cannot grow up because he keeps growing." Eric Hoffer
Register to Reply Good Answer (Score 2)
Participant

Join Date: Jul 2008
Posts: 4
#8
In reply to #5

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/25/2008 7:29 AM

Thanks for your advice. For a $6,000 kettledrum I think I would like to go with a stainless steel or chrome steel sprocket with a nice solid chain like the comercially available ones. Your ideas about keeping the chain tight and the tork down are very interesting to me, I just don't know enough about where to buy the items, since suppliers deal with big companies. And the drum companies do not sell parts.

Any ideas about suppliers who could give good advice and sales on roller sprockets of about 3 inches and quality adjustable size chain,would certainly help!

Register to Reply
Guru
United Kingdom - Member - Old New Member

Join Date: Jul 2005
Location: South east U.K.
Posts: 3695
Good Answers: 93
#6

Re: Sprocket and Chain Mechanism For a Kettle Drum

07/25/2008 4:29 AM

You don't say where you are but someone like HPC can supply the parts although you will get a better deal at a local engineering supplier. Perhaps this site will help to identify what you need.

__________________
I didn't have a really important life, but at least it's been funny (Lemmy Kilminster 1945-2015)
Register to Reply
Guru
Hobbies - RC Aircraft - New Member Hobbies - Automotive Performance - New Member Hobbies - DIY Welding - New Member

Join Date: Jul 2007
Location: Fort Lauderdale Florida
Posts: 5708
Good Answers: 123
#9

Re: Sprocket and Chain Mechanism For a Kettle Drum

08/24/2008 8:31 PM

Try WWW.grainger.com and www.mscdirect.com. Both of these sites have the sprockets and chains you desire. Because you are using 10 sprockets on a circle, you will have a small contact area per sprocket. You might have to use two stacked chain sets, and then only hit every other tuning rod with each chain. If you are really creative, you could get a small motor with a speed reducer to do the tuning. Just remember to put a limit switch on it to prevent over tightening. Send pictures. Good luck.

__________________
Bob
Register to Reply
Register to Reply 9 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

bob c (1); charsley99 (2); jefpren (3); Just an Engineer (1); Laughing Jaguar (1); Nigh (1)

Previous in Forum: Materials name and percentage of each materials for SS 304L & 316L   Next in Forum: convention lathe machine job - machining time calculation or its formaula

Advertisement