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Technical & Reference Section => Tech and Restoration => Topic started by: Bigplinky on August 07, 2007, 10:46 AM
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Got a spider for my gen 2 profile box cranks the other week but was a bit surprised by the diameter of the hole in the centre. I was expecting it to be 19mm so it went straight on the spindle but it measures 22.5mm(ish) now this is too small to fit on a 1 piece crank (23.6mm) so my question is when you bought these cranks new did you have to shim the spider or did you get a 19mm one (and if so what's my one off?).
It's not going to cause me any problems I was just interested.
Cheers
Andy
Pic of spider here
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=120135682134&ssPageName=STRK:MEWN:IT&ih=002
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Profile never made one piece cranks. The shim that you can buy from any profile dealer has two functions:
a) The first is to narrow the diameter down to fit your spindle.
b) The second is that 'top hat' shape of this shim sits neatly onto the inner bearing case, thus working as a spacer between the spider and the bearing so that it dosen't foul up.
hope that helps
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Question answered, top man Dan cheers :daumenhoch:.
Funmonsters got this for sale at the moment which was confusing me
http://cgi.ebay.co.uk/SUPER-RARE-OLDSCHOOL-PROFILE-BOX-ERA-OPC-BMX-SPIDER_W0QQitemZ320141362094QQihZ011QQcategoryZ33503QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
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Well I could be proven wrong, but I've owned a few and they have all been the same internal diameter - and all requiring a profile shim to fit 'neat and snug'.
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This ad shows OPC spiders ;)
(http://)(http://www.radbmx.co.uk/archive/albums/v201/Mattdub/Profilead.jpg)
Courtesy of Andy Funmonster :daumenhoch:
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Fair enough if thats the name for a profile spider - "1 piece crank spider"
Then I stand corrected, my appologies
They are indeed for one piece cranks so you just need the shim to convert them to three piece cranks?
Does someone here have a Profile three piece crank spider - that does 'not' require a shim? Or are all Profile spiders "1 piece crank spiders"?
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Hey Dan ;) ,
Andy sent me that ad recently when we were talking about these , he said he had 2 with different size holes ? .
Did the 3 piece ones only come in silver maybe , the OPC ones in colours ? . Did the 3 piece ones only come with a crank set ? , TBH I don't know much about these because I ran the same pair of 401's ( with a replaced arm once due to Cocksmoor triples ! ) for about 3+ years after going from OPC .
I don't remember that ad from bitd .
Good weekend ? ;)
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Alans sells both shims 23.6 (1 PC spider) and 22.0 (3 PC spider) I think I'm going to get a 23.6 and machine it to a tight fit as I'm a bit anal like that.
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:daumenhoch:
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talking of being anal...
-whats wrong with jamming a pair of tapered pliers into your ring, then reaming it out?
:LolLolLolLol:
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i have two profile spiders,both have different i.d's but both are larger than the profile 2nd gen spindle!
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Looks like the answer to my original question is that you always have to shim the spiders, unless somebody knows different.
Cheers for the info lads
Steve your a strange person
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IT WORKS A TREAT, I DONE IT LAST WEEK
i had a spider that was from a one piece crank
and the top hats from both size -whatever they are to 19mm spindle
-the small one was too small , the large too large
-I simply enlarged the spider to take the larger top hat washer to 19mm
-with a pair of tapered pliers as a reamer
-very true! -plus you can get it really tight :LolLolLolLol: