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Builder's Corner Restoration and preservation. Keep them running in perfect shape. What size is your bottom bracket?

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Old May 2nd, 2015, 6:38 PM   #1
rickstrong
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Default Bottom Bracket Spindle Collars

Greetings All,

I'm sure this is a familiar theme. I have a 1986 Wicked Fat Chance, and as with many others one of the aluminum bottom bracket spindle collars has cracked. I had seen in a post several years ago that Rody Walter at Groovy Cycle Works sold replacement collars. Unfortunately, this is no longer the case. He suggested that I contact Chris Chance at the new Fat Chance website, and the support folks there suggested that I ask in one of the user groups :-/

Are there any sources of replacement collars or suitable substitutes?

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Old May 11th, 2015, 11:31 AM   #2
Jeeves
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I'm not aware of any alternatives, although it's a really simple part. I wonder if Rody would be willing to share the measurements? I'm sure a machine shop could crank these out at a reasonable price if we wanted to do a run.

-Raj
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Old May 11th, 2015, 12:16 PM   #3
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Have you got a picture of one?
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Old May 12th, 2015, 9:20 AM   #4
one piece crank
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The collar on my non-drive-side just split too. Bummer they are NLA.

However, back in the day, Cooks Bros used to offer BB's with a similar smooth spindle and collars. The cool set-up was to stack spacers on the drive-side, and use only one collar on the non-drive side. For the "factory" set-up, you would measure the non-drive-side spacing (as accurately as possible), then fit a spacer stack in place of the remaining collar. Viola - perfectly set-up, no-collar BB!

Last edited by one piece crank; May 12th, 2015 at 10:20 AM.
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Old May 12th, 2015, 6:51 PM   #5
Barnaby
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Not OEM and you'd have to verify the dimensions but... this
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Old May 13th, 2015, 6:41 AM   #6
rody
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For those looking for replacement collars, these are a higher quality than the originals and what we used at Grove for the original Hot Rods.

Sized to fit the Fat spindles:

http://www.ruland.com/shaft-collar.php?recordID=CL-10-A

cheers,

rody
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Old May 21st, 2015, 10:36 AM   #7
Jeeves
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You are the MAN Rody! Thanks for continuing your support of the vintage FAT community.

-Raj
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Old August 8th, 2017, 12:53 PM   #8
Mikus
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Quote:
Originally Posted by rody View Post
For those looking for replacement collars, these are a higher quality than the originals and what we used at Grove for the original Hot Rods.

Sized to fit the Fat spindles:

http://www.ruland.com/shaft-collar.php?recordID=CL-10-A

cheers,

rody
Aren't these a bit wide compared to the OEM collars? I am about ready to have these machined and have a batch made if anyone is interested? I will only do so if its worth the demand...
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Old December 4th, 2017, 11:06 PM   #9
mobius911
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I just installed the Ruland collars. They are indeed wider by 0.135". So between the two, they are over 1/4" wider. That essentially eliminates the ability to offset the spindle for chainline optimization.

The Rulands also have a larger OD and it appears that they may be able to contact the outer ring of the bearing- not a good thing. I'd be down for a set of remanufactured originals.
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Old March 21st, 2018, 6:00 PM   #10
Mello Grello
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Okay, so I need collars too, so I quickly designed these ones up.

They use an M3 cap screw, ID is 17.05, OD is 31.8mm, and thickness is 8mm. There's a 2mm x 0.5mm shelf so that it only contacts the inner race.

What do you guys think, design-wise? Does it need to be beefier?
Attached Images
File Type: jpg SpindleCollar01.jpg (147.3 KB, 25 views)
File Type: jpg SpindleCollar03.jpg (168.3 KB, 11 views)
File Type: jpg SpindleCollar02.jpg (168.8 KB, 11 views)
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Old April 6th, 2018, 2:33 PM   #11
mobius911
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I like it. Only question is whether there is enough meat around the screw. You've designed it with a bigger OD so that should help.
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Old April 25th, 2018, 12:06 PM   #12
one piece crank
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Easiest solution is to ditch the collars all together, and go stacked washers just like 1980's Cook Bros. bottom brackets. I just split a collar on my Wicked and this is exactly what I'll be doing...
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Old August 12th, 2018, 11:03 AM   #13
one piece crank
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I finally suffered a double collar failure, so I ordered up some stainless precision washers to fill the gap. As mentioned above, back in the day this was an inside trick to avoid using collars and allow fine chain-line adjustment.
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File Type: jpg Fat_Collars2.jpg (406.5 KB, 14 views)
File Type: jpg Fat_Collars1.jpg (405.5 KB, 15 views)

Last edited by one piece crank; August 13th, 2018 at 7:49 AM. Reason: corrected "auto-correct" to say chain-line!
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Old August 12th, 2018, 7:41 PM   #14
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Love that paint job, is that original?
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Old August 13th, 2018, 7:45 AM   #15
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Oh yeah - the color is "Last Page Pink with Dark Violet splatter"! Frame, fork and IRD stem all painted at Fat City in 1989.
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