On Sun, 12 Nov 2017 07:38:50 -0800, Joerg <
ne...@analogconsultants.com>
wrote:
>On 2017-11-11 18:13, John B. wrote:
>> On Sat, 11 Nov 2017 10:39:42 -0800, Joerg <
ne...@analogconsultants.com>
>> wrote:
>>
>>> On 2017-11-11 07:51, jbeattie wrote:
>
>
>[...]
>
>>>> ... Avid uses a
>>>> higher torque spec. 5nm should be plenty to keep your stem and
>>>> headset tight, but probably not in Cameron Park.
>>>>
>>>
>>> It does but only if I smear some grit-laden toothpaste on the fork tube
>>> before sliding on the stem. Not the paste for electric brushing but the
>>> regular paste. What I am saying is that 5nm feels like it's about to
>>> strip the aluminum threads out.
>>
>> I think I'd buy a torque meter. And use it :-)
>>
>
>Trying to be a minimalist I have a makeshift one that was ridiculed here
>but when compared to pro gear is more accurate than anything from a
>hardware store: A digital suitcase scale. I can torque a screw to
>precisely 44 in-lbs. Not 42 or 46 but exactly 44. Try that with one of
>those ratchet gizmos.
>
Yup, you can use a scale and a carefully measured length wrench but it
is hardly necessary as torque limits always seem to be quite liberal.
Shimano specifies 2 - 4 Nm (18 - 36 "lbs) for brake disc attaching
bolts. No need to get right down to the nth degree.
By the way, in instances where torque is really, really, important,
say the bolts that hold a radial engine crankshaft together the usual
method is to measure the stretch of the bolt rather then the force
required to twist the bolt which is subject to all sorts of
variations.
>That tool can also accurately weigh bicycles and other unwieldy devices.
>It has a sturdy loop with a click lock.
>
>
>> Alternately there might be sufficient material to drill and tap bolt
>> holes out to the next size, i.e., 5mm -> 6mm.
>>
>
>There isn't but worst case I file it flat on the other side and place a
>capped steel nut.
>
>
>> Another idea might be to see what the real racing boys are using for
>> stems and use the same. I doubt that a guy racing for a $750,000 first
>> prize (The winner of the Munga will take home $750,000, followed by
>> $100,000 for second, and $50,000 for third place ) plans on having
>> many problems with the stem on his bike.
>
>
>I wasn't planning on spending $20k+ on a mountain bike.
I doubt that the stem on a racing MTB bike costs much different then
the stem on a cheap bike.
But aren't you the one that is always talking about safety and
isolated instances where you need a rock to be safe? And now you are
willing to forgo quality steering for just some cheap old crap bike?
--
Cheers,
John B.