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ROD
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« on: September 26, 2012, 10:32:18 AM » |
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ooh its quite cosy in this section aint it! Dont think Ive been here before!  Right ,I need to know if there are any bikes with a rear sprocket that has a large centre hole? Im trying to get to the local bike shop today to ask,but its peeing down here,and I only have the trike for transport! Also..do the sprockets have hardened teeth? or could I use a flat plate sprocket and machine out the centre? (I dont think plate wheels that you can get from a normal supplier are hardened) Any info muchly appreciated. Rod |
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triker_Chewie
Hero Member
Karma: 42
Posts: 1712
west aussie dreamer
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« Reply #1 on: September 26, 2012, 02:55:13 PM » |
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you can bore a sprocket out to suit the hole.
or have the plate sprocket hardened
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I hate when people compare Lemmy with God, i know he is great but he is not gonna be Lemmy, ever If your Dad hasnt got a beard, you've got two Mums there's no point it lookin' pretty if we can't drive it.
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ROD
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« Reply #2 on: September 26, 2012, 03:02:31 PM » |
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If I open up the hole in a regular bike sprocket ,the hole will use up the space where the mounting holes were.
I think that hardening to the standard required may be a pro job.
Basically,I'm after a sprocket about 9" o/a diameter,with a hole in centre big enuf to fit over a Reliant hub
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« Last Edit: September 26, 2012, 03:09:55 PM by ROD »
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skiprat
Full Member
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Posts: 145
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« Reply #3 on: September 26, 2012, 04:03:22 PM » |
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just get it made as you want to, far easier and not that expensive
specify the hole dia in the middle, and then the PCD and number of mounting holes etc
have links on the PC at home to 2 companies that do them
last one I had done was about £35
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ROD
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« Reply #4 on: September 26, 2012, 04:09:01 PM » |
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Really? Ive just been quoted an outrageous £200! Will be interested in the contact details mate.
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triker_Chewie
Hero Member
Karma: 42
Posts: 1712
west aussie dreamer
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« Reply #5 on: September 27, 2012, 12:38:19 AM » |
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probably better to talk to an industrial sprocket mob not a bike mob
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I hate when people compare Lemmy with God, i know he is great but he is not gonna be Lemmy, ever If your Dad hasnt got a beard, you've got two Mums there's no point it lookin' pretty if we can't drive it.
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digger06
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« Reply #6 on: September 28, 2012, 04:40:14 AM » |
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a st sprocket would be better, when you come to replace it, it would be easier?
post the dimensions up you want
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ROD
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« Reply #7 on: September 28, 2012, 04:50:13 AM » |
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I need a sprocket about 9" diam with a centre hole large enough to fit over a Reliant hub,to run a 530 ish chain. Theres a company called 'Ginger parts' selling steel sprockets,they seem cheap.Their website has dimensions of the sprockets as well,so easy to choose. Im thinking steel,but the alloy ones seem more popular generally,but would wear quickly?
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digger06
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« Reply #8 on: September 28, 2012, 04:51:25 AM » |
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gimme the exact hole size,and any other dimensions you need,,on here or pm me, i have a few trade books with sprocket dimensions in, ill av a look tonight, incase,
tbh i always used steel sprockets,
i always thought the alloy uns wore quicker , but some might say different?
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« Last Edit: September 28, 2012, 04:53:50 AM by digger06 »
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ROD
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« Reply #9 on: September 28, 2012, 04:53:19 AM » |
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ok I'll measure it this afternoon .Thanks.
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nabsim
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« Reply #10 on: September 28, 2012, 05:12:06 PM » |
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Are Ali sprockets just for competition stuff where they would prefer the weight saving to longevity?
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ROD
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« Reply #11 on: September 28, 2012, 05:15:31 PM » |
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as far as I have researched they are used for both road and track.I think Ive sorted myself now.  Im using steel sprockets . |
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Archie
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« Reply #12 on: September 28, 2012, 08:24:31 PM » |
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Have a look at single sided stuff like vfr 750 / triumph speed triples / some beemers
I can't guarantee, but im sure they are slightly bigger in the middle as they have to go over or behind a larger hub.
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lunatic
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« Reply #13 on: November 04, 2012, 04:30:34 PM » |
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My speed triple has a big ol hole in the centre of the sprocket, i could give it a measure if you like?
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Cabman77
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« Reply #14 on: November 04, 2012, 07:14:10 PM » |
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In the past I`ve just gone to a bike breaker and found one with the right number of teeth, re drilled the pcd (welding up existing holes if necessary) and turning the central hole out to the size required.
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..........and Joshua entered Jericho on his Triumph..............
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