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1Back to top Go down    Shock Mount bolts/studs - why allthread? on Fri Sep 29, 2017 9:00 am

Gaz

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Curiosity question from me!

The shock absorber mounting bolts/studs on all three of my BMWs are threaded for their full length - why is this so?

Thanks in advance to those well informed technical people who can shed some light on this question.

Cheers


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Gaz
95 K1100LT 0232224; 90 K75 6427509; 87 R80G/S PD 6292136
    

JR_K100RS

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Hmmm yes Gaz , I fabbed up my own with shank where it goes through the shock eye then about 15 mm of thread for the nut

John Re

Melbourne Australia


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Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
    

RicK G

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A rolled thread is much stronger than a cut thread like JR has said he has. When a thread is rolled the stock starts out smaller in diameter than the thread ends up being. i.e. a 12mm rolled thread is actually around 11.9mm diameter and the stock starts out a touch over 11mm. having a rolled thread just on each end causes problems having a good fit at the centre because the ends are bigger. So to get maximum strength the thread is rolled along the full length and a steel sleeve used to stop the thread tearing the rubber apart.
QED


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats." from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

Gaz

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Onya Rick!


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Gaz
95 K1100LT 0232224; 90 K75 6427509; 87 R80G/S PD 6292136
    

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