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#11
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Help! Stuck Schlumpf Shifter Button
dang Ken, the seatpost/frame problem and now this, that has gotta be frustrating. I was daydreaming about some long distance tours this morning - I wouldn't want to have glitches like this out in the middle of nowhere. -- lunicycle ------------------------------------------------------------------------ lunicycle's Profile: http://www.unicyclist.com/profile/16926 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
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#12
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Help! Stuck Schlumpf Shifter Button
GizmoDuck;1122575 wrote: 50 Nm But who on earth carries a torque lever in their toolkit anyway? I want to throw the damn thing out the window. Just spent the last hour trying to hold the shfit shaft and unscrew the stuck button, now I think I've damaged the threads on it. Guni's suck! Depressing indeed. Geared unicycles may suck but they're faster. Maybe that sucks too... But 50 Nm?? Maybe that's for the crank fixing screw? Sounds like way too much for the screw to fix the button. If you did that to yours... no wonder you damaged it! -- Klaas Bil ------------------------------------------------------------------------ Klaas Bil's Profile: http://www.unicyclist.com/profile/3442 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#13
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Help! Stuck Schlumpf Shifter Button
Klaas Bil;1122676 wrote: Depressing indeed. Geared unicycles may suck but they're faster. Maybe that sucks too... But 50 Nm?? Maybe that's for the crank fixing screw? Sounds like way too much for the screw to fix the button. If you did that to yours... no wonder you damaged it! Last week I thought GUni's were great. Today I think they suck. Maybe next week I'll give you a balanced opinion. Now I have no idea how much 50Nm is. That's what was scribbled on the Schlumpf manual. I have no idea who wrote it in there. It's either Florian or the UDC boys. I tried Spencers double nut technique today. The shaft takes 5mm nuts. Unfortunately it didn't work. The next option is to take it to the bike shop on Monday to take my crank off (I brought the wrong crank extractor with me- non-ISIS). Hopefully that will give a bit more leveraget to work with. If that doesn't work, I think I'll break the button so that the dome is off. I won't be able to shift whilst riding, but at least I can get in there and tighten the loose crank, which is what is stopping me riding at the moment. -- GizmoDuck The Induni Unicycle Tour 2009. Unicycle Tour of India. Email me for details. www.induni.adventureunicyclist.com The Uninam Tour 2008.....Hanoi to Saigon!!! www.uninam.net The SINZ Unicycle Tour 2007....South Island, New Zealand www.sinzuni.org ------------------------------------------------------------------------ GizmoDuck's Profile: http://www.unicyclist.com/profile/794 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#14
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Help! Stuck Schlumpf Shifter Button
GizmoDuck;1122694 wrote: Last week I thought GUni's were great. Today I think they suck. Maybe next week I'll give you a balanced opinion. Which is what we expect from a unicyclist GizmoDuck;1122694 wrote: Now I have no idea how much 50Nm is. That's what was scribbled on the Schlumpf manual. I have no idea who wrote it in there. It's either Florian or the UDC boys. The unit of torque Nm is the product of force expressed in Newton and the length (between the pivot point and where the force is exerted) expressed in metres. 50 Newton is about the weight of a mass of 5 kilograms. So that force exerted on an arm of 1 m is 50 Nm. If you grip your allen key 10 cm from where it turns (which is quite much for a 2.5 mm size key), you would have to pull the 10-fold of that, i.e. 50 kg. I guess that's almost your own weight (Ken). If your allen key is shorter, you have to pull with an even bigger force to get at 50 Nm. Go figu 50 Nm is a lot of torque for such a tiny screw! GizmoDuck;1122694 wrote: The next option is to take it to the bike shop on Monday to take my crank off (I brought the wrong crank extractor with me- non-ISIS). But I thought the issue with accessing the crank screw was that the button is in the way, not the type of extractor? Edit: careful with breaking the button off its stem on purpose. Don't damage the shifter shaft or you're worse off. -- Klaas Bil ------------------------------------------------------------------------ Klaas Bil's Profile: http://www.unicyclist.com/profile/3442 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#15
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Help! Stuck Schlumpf Shifter Button
GizmoDuck;1122575 wrote: 50 Nm I want to throw the damn thing out the window. Just spent the last hour trying to hold the shfit shaft and unscrew the stuck button, now I think I've damaged the threads on it. Guni's suck! Ken, I just read the KH-Schlumpf hub manual, and nowhere in it does it state that the 2.5mm allen grub screw should be tightened to 50Nm! Florian told me when he gave me the hub that the -_crank_bolts__-should be tightened very tight, and in fact 50Nm was the torque he recommended. Maybe this is what you're getting confused with. I feel your pain - I spent hours and hours trying to fix the side to side play inherent in my road Schlumpf hub to no avail. It just about drove me nuts! -- TonyMelton 'Take a squizz at my YouTube videos!' (http://www.youtube.com/user/unimeltdown) ------------------------------------------------------------------------ TonyMelton's Profile: http://www.unicyclist.com/profile/2118 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#16
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Help! Stuck Schlumpf Shifter Button
Oh yes, Florian sells pre-calibrated torque screwdrivers as an accessory. From personal experience I can highly recommend these to owners of the Schlumpf road hub. They make tightening up the 1.5mm grub screw to the required torque so that the buttons don't fall off oh so easy. I don't know if they are so essential for the newer KH-Schlumpf though, as I've never had to mount the buttons of this hub. -- TonyMelton 'Take a squizz at my YouTube videos!' (http://www.youtube.com/user/unimeltdown) ------------------------------------------------------------------------ TonyMelton's Profile: http://www.unicyclist.com/profile/2118 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#17
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Help! Stuck Schlumpf Shifter Button
TonyMelton;1122707 wrote: Ken, I just read the KH-Schlumpf hub manual, and nowhere in it does it state that the 2.5mm allen grub screw should be tightened to 50Nm! Florian told me when he gave me the hub that the -_crank_bolts__-should be tightened very tight, and in fact 50Nm was the torque he recommended. Maybe this is what you're getting confused with. I feel your pain - I spent hours and hours trying to fix the side to side play inherent in my road Schlumpf hub to no avail. It just about drove me nuts! Oh ok, I read it in the manual but never took any notice of it, because I don't have a torque wrench anyway. It could say 1000Nm for all the difference it makes. Have you tightened your torque lever? I had some play with the road hub and it went once I tigheted the torque lever. Also, your frame does flex a bit...you could try sticking a brake booster on there to stiffen things up. -- GizmoDuck The Induni Unicycle Tour 2009. Unicycle Tour of India. Email me for details. www.induni.adventureunicyclist.com The Uninam Tour 2008.....Hanoi to Saigon!!! www.uninam.net The SINZ Unicycle Tour 2007....South Island, New Zealand www.sinzuni.org ------------------------------------------------------------------------ GizmoDuck's Profile: http://www.unicyclist.com/profile/794 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#18
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Help! Stuck Schlumpf Shifter Button
GizmoDuck;1122694 wrote: Now I have no idea how much 50Nm is. That's what was scribbled on the Schlumpf manual. I have no idea who wrote it in there. It's either Florian or the UDC boys. I tried Spencers double nut technique today. The shaft takes 5mm nuts. Unfortunately it didn't work. What didn't work about it? Were you able to get a solid grip on the two nuts to tighten them against each other? Once they're tight, you should be able to use a socket to hold the shaft. How did you damage the thread? Were you trying to grip it with pliers or something? Also, as has been pointed out, 50Nm is the torque needed for the crank bolts. This equates to pushing really really hard on a socket T-bar (not a ratchet - you'll destroy it) and giving it as much welly as you can. The manual for the new KH hub doesn't specify the torque needed for the grub screw, but the original road hub needed 1.1Nm - or about finger tight plus 1/4 turn for good measure. STM -- semach.the.monkey ------------------------------------------------------------------------ semach.the.monkey's Profile: http://www.unicyclist.com/profile/12078 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#19
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Help! Stuck Schlumpf Shifter Button
GizmoDuck;1122722 wrote: Have you tightened your torque lever? I had some play with the road hub and it went once I tigheted the torque lever. Also, your frame does flex a bit...you could try sticking a brake booster on there to stiffen things up. I've got a brake booster on my Maguras already. The play that I'm talking about feels like the bearings are loose on the axle. Even with the optimum number of spacers on the axle (as adjusted by Florian Schlumpf himself) there is still some play. Tightening the torque arm won't fix it. However it doesn't seem to matter too much and it isn't noticable (or distinguishable from the crank slop) when riding. I tried the same hold-the-frame-steady-and-wiggle-side-to-side test on a couple of other road schlumpf hubs at UNICON and they all had some side to side play. My conclusion is that this play cannot be eliminated and originates from the lack of lateral stiffness of the bearings themselves. -- TonyMelton 'Take a squizz at my YouTube videos!' (http://www.youtube.com/user/unimeltdown) ------------------------------------------------------------------------ TonyMelton's Profile: http://www.unicyclist.com/profile/2118 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
#20
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Help! Stuck Schlumpf Shifter Button
On the subject of 50 Nm torque for tightening the crank bolts: I believe your manual had the figure hand written in by Florian (it wasn't us folk at UDC). I took my hub in to a bike shop to get the cranks tightened and they looked at me like I was crazy when I requested a 50Nm torque on each crank. It turns out that when dealing with bikes the highest they use is generally 20-25Nm. We managed to get one crank to 50Nm but it was a behemoth of an effort and the other one was harder to tighten and only got to 30Nm. The interesting thing was that despite them being on ridiculously tightly they still need tightening up after the first few rides. I didn't bother taking the uni back to the bike shop but I did tighten them as hard as I possibly could without a torque wrench. For good measure I repeated the process after a few more rides. I would recommend all new KH/Schlumpf owners to check your crank tightness fairly regularly, at least for the first wee while. -- peter.bier -Peter Bier ------------------------------------------------------------------------ peter.bier's Profile: http://www.unicyclist.com/profile/1506 View this thread: http://www.unicyclist.com/thread/73859 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- http://www.usenet.com |
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Thread | Thread Starter | Forum | Replies | Last Post |
Help! Stuck Schlumpf Shifter Button | GizmoDuck | Unicycling | 1 | October 31st 08 03:13 PM |