now what you need to do is buy one of these and combine the two...
http://www.axminster.co.uk/axminster-sa ... rc=froogle
http://www.axminster.co.uk/axminster-sa ... rc=froogle
UN52 - Killing Me Softly
- Thread starter Woz
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Would be cool if someone could verify FluffyChicken's idea and post pictures. If he is right, then the cat is truely out of the bag of how Shimano assembled it. I'm not entirely sure but from memory a 113mm or greater axle length does not have the stupid DS pressed washer meaning just a precision screwdriver and 15mins is needed!
All the myths about them being pressed and sealed together by massive robots, and the whole unit full of marin grease, and significantly that they can not be serviced :idea: will be thrown out of the window once and for all.
Come on chaps! Someone must be geek enough to reverse engineer and forward engineer the whole unit to prove the point!
All the myths about them being pressed and sealed together by massive robots, and the whole unit full of marin grease, and significantly that they can not be serviced :idea: will be thrown out of the window once and for all.
Come on chaps! Someone must be geek enough to reverse engineer and forward engineer the whole unit to prove the point!
26er
GT Fan
It surprises me SHIMs didn't use industrial bearings simply pressed on the spindle instead. But that implies putting new bearings in would've been made too easy. In addition it would've made centering the spindle in the frame possible without having to put spacers on the DS. Too much rocket science for a simple BB cartridge I guess.
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26er":2cdu1mva said:
The problem with that method (I assume cartridge bearings as they are commonly known) and why those method employed by others is the axle either need to be thinner or the ball bearings need to be smaller. Why bother with that when you can get better. Big bearings, large contact area and all sealed from the outside with bearing support built in and no need for thinner or smaller axles. Plus it's cheaper if you're making them all the same and not relying on pressing tolerances. This is mass market through the range which includes people who do not want to do any maintenance, not the smaller boutique market with CNC machines.
Fit forget for a long time then throw out.
Rather than fit, replace bearing, replace bearings, replace bearings regularly, bearings now obsolete (in the case of a few manufacturers),
26er
GT Fan
UN54 - Killing It The Hard Way
In the name of love, rocket science and Spanish surrealists tonight I gladly sacrificed a brand new BBUN54 on the altar of holy RB. No drills, drill bits, precious precision screwdrivers or any other fancy stuff were required at all. Only a vice, a hammer and a knife i.e. the most basic set of tools available already to the people of the stone age and to Mayans, too… I guess. So, if you like I and Woz ain’t got nothing better to waste your time on here’s a step by step description of how to get your spindle out of a SHIMANO square taper cartridge. Buckle up, and here we go:
1. Clamp the BB NDS up in your vice – 10 sec.
2. Pry off the NDS seal and plastic cage (use tip of the knife) – 30 sec.
3. Turn the BB upside down and clamp it DS up – 10 sec.
4. Pry off the DS seal and plastic cage (use tip of the knife again) – 30 sec.
5. Unclamp the BB and hold it horizontally to let all balls roll to the bottom – 10 sec.
6. Push the DS end of the spindle upwards away from the balls – 5 sec.
7. Holding the spindle in that position put the BB to rest on the vice NDS up – 5 sec.
8. Now, give the spindle a good hammer blow and it will fly out – 5 sec.
All in all less than 2 minutes if you’re not a monkey or a smoker. Couldn’t be bothered to take pictures as they already been kindly provided by mighty retro guru Woz. So, no visuals at all… and if you think you will be able to get the spindle and all the balls back in again I can only quote Al Pacino in Donnie Brasco: “Forget about it…”.
In the name of love, rocket science and Spanish surrealists tonight I gladly sacrificed a brand new BBUN54 on the altar of holy RB. No drills, drill bits, precious precision screwdrivers or any other fancy stuff were required at all. Only a vice, a hammer and a knife i.e. the most basic set of tools available already to the people of the stone age and to Mayans, too… I guess. So, if you like I and Woz ain’t got nothing better to waste your time on here’s a step by step description of how to get your spindle out of a SHIMANO square taper cartridge. Buckle up, and here we go:
1. Clamp the BB NDS up in your vice – 10 sec.
2. Pry off the NDS seal and plastic cage (use tip of the knife) – 30 sec.
3. Turn the BB upside down and clamp it DS up – 10 sec.
4. Pry off the DS seal and plastic cage (use tip of the knife again) – 30 sec.
5. Unclamp the BB and hold it horizontally to let all balls roll to the bottom – 10 sec.
6. Push the DS end of the spindle upwards away from the balls – 5 sec.
7. Holding the spindle in that position put the BB to rest on the vice NDS up – 5 sec.
8. Now, give the spindle a good hammer blow and it will fly out – 5 sec.
All in all less than 2 minutes if you’re not a monkey or a smoker. Couldn’t be bothered to take pictures as they already been kindly provided by mighty retro guru Woz. So, no visuals at all… and if you think you will be able to get the spindle and all the balls back in again I can only quote Al Pacino in Donnie Brasco: “Forget about it…”.
Continuing with the geeky rubiks cubesque conundrum....
It can be dis-assembled and assembled with nothing more than a house-hold sewing needle or knife or other sharp implement.
26er, good show! I'm relieved there is another sad git on RB. Your Saturday night entertainment is epic. Now, never say anything is impossible....
FluffyChicken, you were not entirely right nor entirely wrong!
Shimano, if you are reading this thread I was about to blackmail you to keep my mouth shut when I cracked the problem. Simple school boy maths and good engineering tolerances is what you have done. I wanted a nice M730 black XT gruppo and a life supply of Jameson whisky. However you have ruined my fun. I did some research and found out you didn't invent the damn thing after all. Actually, you stole the idea from the British you barstewards. You waited for a 1903 Patent by a chap called Robert Conrad to expire!
Enjoy the pic!
It can be dis-assembled and assembled with nothing more than a house-hold sewing needle or knife or other sharp implement.
26er, good show! I'm relieved there is another sad git on RB. Your Saturday night entertainment is epic. Now, never say anything is impossible....
FluffyChicken, you were not entirely right nor entirely wrong!
Shimano, if you are reading this thread I was about to blackmail you to keep my mouth shut when I cracked the problem. Simple school boy maths and good engineering tolerances is what you have done. I wanted a nice M730 black XT gruppo and a life supply of Jameson whisky. However you have ruined my fun. I did some research and found out you didn't invent the damn thing after all. Actually, you stole the idea from the British you barstewards. You waited for a 1903 Patent by a chap called Robert Conrad to expire!
Enjoy the pic!
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