nitram38
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| posted on 25/2/07 at 07:11 PM |
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Sprocket maker?
I have a lsd siera diff with a 42 tooth cog attached for a chain drive.
First I am after some sort of ratio calculator for sproket/wheels etc, but more importantly I need someone to make a bigger sprocket.
Chris mason said 54 teeth.
I would prefer a steel one over aluminium.
Any suggestions?
Cheer Martin
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pathfinder
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| posted on 25/2/07 at 07:39 PM |
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If you draw it I can waterjet cut it for you!
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blue2cv
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| posted on 25/2/07 at 07:46 PM |
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I found years ago whilst racing motocross that alloy sprockets lasted better than steel, i'll look on my spare chain drive diff to see who made
the sprocket for me.
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nitram38
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| posted on 25/2/07 at 07:54 PM |
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quote:
Originally posted by pathfinder
If you draw it I can waterjet cut it for you!
I am trying to find out how in solidworks, but there are no topics on the subject!
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macnab
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| posted on 25/2/07 at 08:41 PM |
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quote:
Originally posted by pathfinder
If you draw it I can waterjet cut it for you!
What format do you need as I will be needing brackets cut out in aluminium very soon? Would you be able to do that???
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G.Man
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| posted on 25/2/07 at 09:07 PM |
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if the load is spread around a large sproket, alloy will last just as well as steel..
The chain will be gone a ruin the sprocket before the alloy will wear out...
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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K13JOB
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| posted on 25/2/07 at 09:35 PM |
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have alook at the chain drive pages of www.westgarage.co.uk then give Douglas a call. I an sure he can sort something out for you.
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nitram38
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| posted on 25/2/07 at 09:45 PM |
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quote:
Originally posted by K13JOB
have alook at the chain drive pages of www.westgarage.co.uk then give Douglas a call. I an sure he can sort something out for you.
Thanks for that, he has a picture of the sprocket I need here starting at £55.
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motorcrossrider
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| posted on 25/2/07 at 09:54 PM |
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There is a company called charles leak and sons in the village of leak in staffordshire. They specialise in gear cutting and have made some gears for
me in some very hard metals. Not sure of the number but try yell.com
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Coose
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| posted on 25/2/07 at 10:00 PM |
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Try B&C Express here.
Spin 'er off Well...
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nitram38
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| posted on 25/2/07 at 10:00 PM |
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Just found this
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pathfinder
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| posted on 25/2/07 at 10:15 PM |
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a dxf will do the job!
quote:
Originally posted by macnab
quote:
Originally posted by pathfinder
If you draw it I can waterjet cut it for you!
What format do you need as I will be needing brackets cut out in aluminium very soon? Would you be able to do that???
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macnab
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| posted on 26/2/07 at 08:48 AM |
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hmm not sure my old autocad will do those, I'll certainly have a look. ta.
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Syd Bridge
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| posted on 26/2/07 at 09:55 AM |
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Multiply the chain pitch by the number of teeth you want, this gives the circumference. Divide by pi, this gives the diameter. Draw a circle of this
diameter, put a cutout in circumference the size of the chain roller, make a polar array of the number of teeth required, fillet the tooth ends and
polay array again, and job's done.
I'd do it for you, but I'm some distance from my cad machine. The pic in the link below will show what you end up with.
Cheers,
Syd. 
 
Bike Drive Assy
[Edited on 26/2/07 by Syd Bridge]
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nitram38
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| posted on 26/2/07 at 07:00 PM |
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I ordered my sprocket from Douglas at West Garage Engineering today.
He has the pattern for a sierra diff with all the bolt holes. He said it will fit a 530 chain and he will cut it in half so I can change sprockets
easily.
He charged me £55 + £6.50 p & p.
Moto racing emailed me. They were about £40 all in, but I would have to draw it and I would have to cut it in half afterwards !
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