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Post subject: Offset sprockets
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spondon440  Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
I sort of offered these around a few weeks ago but opened a can of worms, like always what I've had made was not what everyone wanted.
I'm currently working on bigger offset for other people but in the mean time I need to start shifting these.
For those who asked before I appologise if I didn't get back to you, my wifes been in hospital and to be honest shifting these had been the last thing on my mind, it just seems easier to start with a new thread and some pictures.
The cost is £37.00 each plus carriage but I can do better prices if I can sell like 20 at the same time (not all to one customer just firm orders from a few of you at once) the cost of heat treatment and modifying them all at the same time means I have some movement on price.
http://i200.photobucket.com/albums/aa192/spondon440/dimetioned.jpg
http://i200.photobucket.com/albums/aa192/spondon440/DSCF0520.jpg
As you can see in the photo, you can have anything upto a 20 mm offset, I have 15off 15 tooth, 15off 16 tooth and 20off 17 tooth, I need to see if any of you are interested and whether I'll ever repeat the excersize.
Any questions at all just ask.
Andy
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Posted: Sun Jan 27, 2008 6:36 pm
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Post subject:
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| Rich |
Not wishing to state the obvious but how do you get the nut on? The thread on the gearbox shaft will actually sit inside the sprocket 
Other offset sprockets I've seen are hollowed out in the centre so there is space for the nut and tab washer.
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Posted: Sun Jan 27, 2008 6:55 pm
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Post subject: Bespoke sprockets explained
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spondon440Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
| Rich wrote: |
Not wishing to state the obvious but how do you get the nut on? The thread on the gearbox shaft will actually sit inside the sprocket
Other offset sprockets I've seen are hollowed out in the centre so there is space for the nut and tab washer. |
Sorry guys, but when I said modified I guessed you'd all realise they haven't been modified yet.
They don't have a counter bore in them as you rightly said, because if there was it would limit them to a size of offset.
If anyone orders say a 7mm offset I will machine the back so it gives the required 7mm step from the back of the sprocket teeth to the back of the sprocket and then counter bore the front to give the same thickness as an original sprocket and clearance for tab washer and nut.
They are bespoke sprockets so you don't have to buy a sprocket that is a compromise where you have to fit 5 washers behind the sprockets to get the required offset, I'll make them exactly right for you.
You haven't picked up on the fact they haven't been hardened yet either, so before someone does, it's because I can't machine them if they are hard, thats why I need lot's of orders so I can keep hardening costs down.
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Posted: Sun Jan 27, 2008 7:45 pm
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Post subject: heat treat
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kicky1 Regular Racer Joined: 14 Jan 2006 Total posts: 344 Location: WEST YORKSHIRE (HUDDERSFIELD) |
im in the heat treatment game ,how much are you paying/what treatment do you need on em ?.chris
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Posted: Sun Jan 27, 2008 9:25 pm
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Post subject: Re: heat treat
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spondon440Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
| kicky1 wrote: |
| im in the heat treatment game ,how much are you paying/what treatment do you need on em ?.chris |
Mild steel case hardened .030" deep, probably just on the teeth.
Do you harden using vacuum ovens? if so I can paint the bits I don't want hard in Gako.
Andy
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Posted: Sun Jan 27, 2008 9:39 pm
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Post subject:
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n chambers53![[RD/RZ Blood Donor]](../img/pipsvip.jpg "RD/RZ Blood Donor")
RD/RZ Blood DonorDaily Burner Joined: 19 Nov 2006 Total posts: 155 Location: Ilkeston. Maa Dook |
pm sent.
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Posted: Sun Jan 27, 2008 9:46 pm
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kicky1Regular Racer Joined: 14 Jan 2006 Total posts: 344 Location: WEST YORKSHIRE (HUDDERSFIELD) |
I don't want hard in Gako ?.the stuff we harden is to militiary standard.done in sealed quench furnaces etc,i would have thought a sprocket has case all over ?,but can mask of what needs keeping soft with special paint (berkstop carb stop off paint).let me know if you want any doing or a sample etc.ive carbed loads of chain for people for securing bikes etc.as you say it can be expensive tho if you dont have the right contacts.
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Posted: Sun Jan 27, 2008 9:49 pm
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Post subject: case harden
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spondon440Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
| kicky1 wrote: |
| I don't want hard in Gako ?.the stuff we harden is to militiary standard.done in sealed quench furnaces etc,i would have thought a sprocket has case all over ?,but can mask of what needs keeping soft with special paint (berkstop carb stop off paint).let me know if you want any doing or a sample etc.ive carbed loads of chain for people for securing bikes etc.as you say it can be expensive tho if you dont have the right contacts. |
I doesn't need to be hard but the teeth, the splines are a good fit and as you know some heat treaters are sh**e.
Your in Huddersfield, we could do business.
I have a lot of parts hardened but not much case, I pay £60 which is Wallworks min charge, I can't fit it in with what we do so I'd have to pay £60 for one or 20off, see my dilemma.
Andy
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Posted: Sun Jan 27, 2008 10:17 pm
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Post subject:
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Pat. Suburban Commuter Joined: 06 May 2006 Total posts: 61 Location: Watford |
Hi Andy,
I will have a 17 tooth with a 10mm offset please.
Cheers, Pat Herron.
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Posted: Sun Jan 27, 2008 11:19 pm
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Post subject:
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spondon440Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
| Pat. wrote: |
Hi Andy,
I will have a 17 tooth with a 10mm offset please.
Cheers, Pat Herron. |
Hi Pat,
I'll modify it and post the picture that way everyone knows what I'm offering, I personally need 6 anyway so I think they'll be ready fairly soon.
Andy
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Posted: Mon Jan 28, 2008 7:45 am
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Post subject: lost private messages
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spondon440Daily Burner Joined: 07 Feb 2007 Total posts: 162 |
Too everyone that pm'd me about sprockets, I've accidentally deleted all my inbox messages, please contact me again.
Andy
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Posted: Sun Feb 03, 2008 11:45 am
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Post subject:
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CairnsyDaily Burner Joined: 03 Oct 2006 Total posts: 222 Location: Cairns, Tropical North Queensland, Australia |
Hey Andy,
I realise you've been busy man, but I have PM'ed and responded to your posts, asking if you can help at least three of us with 28mm offset sprockets for our Aprilia RS250/RZ projects. I believe there are a few other guys on the RGV Forum looking for the same offset.
Could you please just let us know if you can help?
Cheers
Steve
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Posted: Sun Feb 03, 2008 1:48 pm
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