#1
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brake arm
If we assume Torpedo 1S original parts how hard
should you pull the nut? I heard 28-32 Nm for the dome nuts on the axle is what Shimano specifies for their 1S hub. Also, is it mandatory to release the nut before pulling the wheel back to tighten the chain? Because I know it can be done without doing so. -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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brake arm
On Tue, 02 Jan 2018 06:52:29 +0100, Emanuel Berg
wrote: If we assume Torpedo 1S original parts how hard should you pull the nut? I heard 28-32 Nm for the dome nuts on the axle is what Shimano specifies for their 1S hub. Also, is it mandatory to release the nut before pulling the wheel back to tighten the chain? Because I know it can be done without doing so. I use carefully calibrated instruments to snug the nuts down just enough: my hands and a standard open end wrench. I've never used a torque wrench for this. Unlike a QR, threaded axles don't add significantly to the bearing preload (because half of the force is loaded against the threads, pulling the axle away from the hub, and half is loaded against the dropout pushing towards the hub). The nuts just have to be snug enough to resist chain tension pulling the freewheel side forward. You will quickly learn to feel how much force is needed. With a toothed washer, not a whole lot of force is really needed with a coaster brake hub. |
#3
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brake arm
Tim McNamara wrote:
I use carefully calibrated instruments to snug the nuts down just enough: my hands and a standard open end wrench. I've never used a torque wrench for this. Me neither, because I don't know how much to pull it! I think I could get a reading from the Shimano 1S hub instructions folder tho as they often put the Nm there even for nuts and screws where you'd never have thought about it apart from just screwing them in. The only time I ever use a torque wrench is for the dome nuts on the wheel axes as I know that should be 28-32 Nm and besides it is so fun and "scientific" to use the torque wrench The casette on MTBs and road bikes should be 40 Nm, right? A lot! -- underground experts united http://user.it.uu.se/~embe8573 |
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