In message <g09fp0$4cm$1@[EMAIL PROTECTED]
>, Keith W
<invalidaddress@[EMAIL PROTECTED]
> writes
>
>"Dave English" <dave.english@[EMAIL PROTECTED]
> wrote in message
>news:$X9v$VJHs+JIFAFx@[EMAIL PROTECTED]
>> In message <20080508184011.0ac241fc@[EMAIL PROTECTED]
>, Chris
<chris@[EMAIL PROTECTED]
>
>> writes
>>>Yes that is the ones 55NM 41lbf ft chapter 10 page 10.1 i had to redo
>>>mine about 12 weeks ago as i had a noise coming from the top.
>>
>>>the only
>>>problem is you have to use a key in the middle and a spanner on the nut
>>>so how you are going to get the right torque i dont know , just pull
>>>till tight and dont move about ,
>>
>> I haven't had to try it myself, but I'd be at least tempted to tighten
the
>> nut with the spanner & key to roughly half torque - then finish with a
>> socket & a torque wrench - hoping the stud wouldn't try to turn
further.
>>
>> Alternatively, you can do it using both a spanner & a socket torque
>> wrench. Put the spanner on the nut, then a tightened nut & bolt say in
>> the opposite end of the spanner with the torque wrench also on that nut
&
>> bolt. It can be a bit unwieldy, but it works because the torque is the
>> same anywhere along the length of the leaver. The same trick is useful
>> for a limited access problem, if you really care that much about the
>> torque.
>>
>
>
>That can't be right.
Sorry, but it is
> If you use a longer lever, i.e. a spanner and a
>lever, then the same amount of pressure at the end of the lever exerts
>greater turning power on the nut. E.g. a pull of 20 pounds 12 inches
from
>the nut is 20 foot/pounds. A pull of 10 pounds 24 inches from the nut
>also gives 20 foot pounds. Therefore applying the same torque to the
>extended lever will greatly over tighten the nut.
Applying a force somewhere along a lever produces a varying torque.
Applying a torque somewhere along a lever always applies the same torque
regardless..
Regards
--
Dave English
|
