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Stem screws

  • 05-04-2013 6:41pm
    #1
    MB Lacey
    Registered Users, Registered Users 2 Posts: 1,277 ✭✭✭


    Is it ok that I replaced the rusty steel screw on the right with the black non steel screw on the left in my road bike stem?

    IMG_1117.JPG

    IMG_1110.JPG

    Same size and length, but I noticed that the steel ones taken from my road bike lack thread on a certain section and I'm wondering if that's important to stop the screws from loosening whilst I put all my weight on the handlebars.

    The black non rusty screws have been taken from a spare Specialised stem I had for my hybrid.

    Thanks.
    I don't fancy my handlebars falling off during my cycle tomorrow morning.


Comments

  • #2
    Ole Rodrigo
    Closed Accounts Posts: 3,013 ✭✭✭Ole Rodrigo


    The unthreaded part of a bolt is to allow it to slide into a recess unobstructed and wont effect the support once the length is the same - a torque key is handy, although not really necessary ( just don't over tighten it )


  • #3
    MB Lacey
    Registered Users, Registered Users 2 Posts: 1,277 ✭✭✭MB Lacey


    ror_74 wrote: »
    The unthreaded part of a bolt is to allow it to slide into a recess unobstructed and wont effect the support once the length is the same - a torque key is handy, although not really necessary ( just don't over tighten it )

    Thanks.
    How do you know when you've tightened it just right, compared to over tightened it?


  • #4
    Ole Rodrigo
    Closed Accounts Posts: 3,013 ✭✭✭Ole Rodrigo


    As far as it will go applying normal pressure, then another half to 3/4 turn for each bolt, doing each one gradually. Make sure the bars are properly centered and take the allen key with you in the morning.


  • #5
    Donelson
    Closed Accounts Posts: 456 ✭✭Donelson


    the untreaded section is to provide additional flexible within the bolting arrangement which improved resistance to loosening due to vibration.

    I think a noticed some grease on the bolt, again this would be good practice and I would suggest you grease your new bolt.


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