RE: Spark plug socket

["Clive Liddell" <cliddell@xxxxxxxxxx>]

Marco,
Interesting information but I would not trust "turn of nut/bolt" alone.  You
have to pre-torque to seat everything and then the angle-torque would be
quite accurate for THAT application.  This is because you are applying a
fixed distance to the nut/bolt and the length of bolt would affect how much
stretching it would affect the clamping force.
Regards
Clive Liddell
Pietermaritzburg, South Africa
'96 R850R ~75kkm
'01 R1100RT ~55kkm


> -----Original Message-----
> From: owner-oilheads@xxxxxxxxx [mailto:owner-oilheads@xxxxxxxxx]On
> Behalf Of Marco S Hyman
> Sent: 07 February, 2005 02:44
> To: oilheads@xxxxxxxxx
> Subject: Re: Spark plug socket
>
>
> gator@xxxxxxxxxxxxxxx writes:
>  > Just my .02 but I think that is the most rediculass thing I
> can think of.
>
> Hmmm, you might be surprised.   There's a table on page 1404 of
> Machinery's
> Handbook 25 that notes the accuracy of bolt preload methods.  They list:
>
> By feel +/- 35%
> Torque Wrench +/- 25%
> Turn-of-nut +/- %15%
> Preload indicating washer +/- 10%
> Strain Guages +/- 1%
> etc.
>
>  > Might be a good gouge when you don't have a torque wrench, as
> is the tool
>  > kit when you don't have real tools..
>
> If the handbook is to be believed the turn-of-nut method is more accurate
> than a typical torque wrench (when both are used by a typical mechanic :-)
>
> // marc

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