Help with bottom bracket on Simplex Bike
- dv
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Help with bottom bracket on Simplex Bike
Postby dv » Sun Mar 02, 2014 1:25 pm
Does anyone know what it is called, how to remove it, and once removed, are there options for replacing with a square taper bottom bracket.
Thanks in advance for any information.
- HappyHumber
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Re: Help with bottom bracket on Simplex Bike
Postby HappyHumber » Sun Mar 02, 2014 1:25 pm
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Mon Mar 03, 2014 10:30 am
- WyvernRH
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Re: Help with bottom bracket on Simplex Bike
Postby WyvernRH » Mon Mar 03, 2014 11:30 am
I will tentatively raise my hand, it looks like an old-fashioned cartridge bearing bottom bracket somewhat like a modern Shimano unit. They came in several flavors.... One type slipped into a plain tube (no threads) bottom bracket and was held in place by a lockring on one side or lockrings both sides. Another type had cups that screwed in to a normal b'bracket and held the bearing unit (aka Shimano-ish) but generally they had a lockring both sides so you could adjust the chainline. Sometimes the 'lockring' was part of the threaded cup.dv wrote:No one has seen one?
That fitting looks like it has a lockring both sides so it might be a one of the second type (possibly an EDCO unit?) if you are lucky. If so you can just undo the lockrings/cups unscrew/remove the unit and replace it with a standard Shimano unit,
If it is of the first type with no threads you might find it harder to get a replacement without doing some engineering. There were a few other variations on this but the above cases would cover most types more or less.
Richard
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Mon Mar 03, 2014 2:16 pm
I will clean and look for the lock rings. There is no thread I think as the plastic inserts just seem to spin freely. Anyway....of to the shed.
.............Nope....No lock ring, the plastic inserts just seem to be holding sealed roller bearings in place. The plastic has clicked into place and I cannot work out how to get the plastic inserts out without breaking them, perhaps a special tool?
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Re: Help with bottom bracket on Simplex Bike
Postby WyvernRH » Mon Mar 03, 2014 3:02 pm
Oh-Oh that sounds like a variation on type 1. I would hazard a guess that the plastic flange has a ring with teeth that fits into a groove either in the inside of the b'bracket shell or in the outside of the bearing unit so when you push the plastic retainers in from both sides of the b'bracket they 'click' into place holding the bearing unit into the bracket.dv wrote:Thanks Richard
I will clean and look for the lock rings. There is no thread I think as the plastic inserts just seem to spin freely. Anyway....of to the shed.
.............Nope....No lock ring, the plastic inserts just seem to be holding sealed roller bearings in place. The plastic has clicked into place and I cannot work out how to get the plastic inserts out without breaking them, perhaps a special tool?
I suspect you are right ans there is some special tool that squeezes the plastic ring so the teeth come free of the groove. Not recommending this at all, but if you get desperate then try gently tapping the end of the axle with a hammer to see if the plastic bit might pop out? This would probably bust the bearing/axle and you might not get to replace it.
Might I suggest Loctite on the cottered axle as a solution?
Richard
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Mon Mar 03, 2014 3:30 pm
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Re: Help with bottom bracket on Simplex Bike
Postby YearoftheCat » Mon Mar 03, 2014 6:57 pm
Scott
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Re: Help with bottom bracket on Simplex Bike
Postby mark field » Mon Mar 03, 2014 11:59 pm
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Tue Mar 04, 2014 12:32 am
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Re: Help with bottom bracket on Simplex Bike
Postby metalrideroz » Tue Mar 04, 2014 11:26 am
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Tue Mar 04, 2014 8:20 pm
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Re: Help with bottom bracket on Simplex Bike
Postby koen » Tue Mar 04, 2014 9:20 pm
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Re: Help with bottom bracket on Simplex Bike
Postby Johnj » Tue Mar 04, 2014 10:11 pm
Installed one below:
Best of luck. The replacement ones on evilbay all look to have cotters....
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Thu Mar 06, 2014 12:43 am
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Re: Help with bottom bracket on Simplex Bike
Postby hiflange » Thu Mar 06, 2014 1:05 am
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Re: Help with bottom bracket on Simplex Bike
Postby rustychisel » Thu Mar 06, 2014 10:28 am
wot, a hammer?? I think he's got one.RobertFrith wrote: Drop me a PM if you need to borrow a cotter pin press.
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Re: Help with bottom bracket on Simplex Bike
Postby LG » Thu Mar 06, 2014 11:47 am
- dv
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Re: Help with bottom bracket on Simplex Bike
Postby dv » Thu Mar 06, 2014 11:50 pm
Anyhow - here is the BB. A weird looking thing with strange dimensions (but I am no expert with push in BBs). The plastic bits seem to fit quite loosely and can spin independently of each other. The roller bearings are pressed tightly on the shaft - and some gently persuasion with a hammer (I do have one) won't budge them. Looks like it was designed for a one way trip, though if the chrome had not come of the axle the bearings still run smoothly and it could have done another 20 years?! (maybe).
- HappyHumber
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Re: Help with bottom bracket on Simplex Bike
Postby HappyHumber » Fri Mar 07, 2014 2:19 am
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
- WyvernRH
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Re: Help with bottom bracket on Simplex Bike
Postby WyvernRH » Fri Mar 07, 2014 6:14 am
EDCO are still in business last I heard and do make a 'threadless' cartridge b'bracket which may fit your dimensions.
Do a quick search around the Web and you may come up with a valid replacement, especially from a shop in The Netherlands or Belgium.
It will be square taper tho to take 'modern' cranks.
Richard
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Re: Help with bottom bracket on Simplex Bike
Postby ldrcycles » Fri Mar 07, 2014 7:22 am
LG wrote:Maybe he needs to borrow a bigger hammer
Chris Hemsworth holding a "cotter pin press"
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Re: Help with bottom bracket on Simplex Bike
Postby LG » Sat Mar 08, 2014 2:41 pm
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