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Torque wrench question

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Cycling Equipment
Published
30 October 2005
Last activity
3 November 2005
Original author
PJay
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60
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  1. Peter Chisholm said:


    I'm a bike mechanic, not a car mechanic but every decent, non-car
    dealer' wrench I have ever talked to uses a torque wrench on things
    like drive train bolts and head bolts. IT is NOT a rudimentary part of
    mechanical skill. It is the lazy mechanic that doesn't take the few
    extra seconds to use a torque wrnch instead of just a 'wrench'. The
    difference between a good mechanic and a great one.

    Yes, I've long maintained that torque wrenches are automotive tools.

    I'm not sure what you mean by "drive train bolts" but certainly it is
    proper to use a torque wrench on head bolts or other applications that
    rely on gaskets getting crushed just the right amount.

    However, I don't know of any such gasketed interfaces on bicycles.

    Sheldon "http://sheldonbrown.com/tork-grip" Brown
    +-------------------------------------------------+
    | Men have become the tools of their tools. |
    | -- Henry David Thoreau |
    +-------------------------------------------------+
    Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041
    http://harriscyclery.com
    Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com

  2. "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

  3. Leo Lichtman said:


    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Many are specified in the little pamphlets that come with parts.
    Whether they are required I don't know.

    JT

    ****************************
    Remove "remove" to reply
    Visit http://www.jt10000.com
    ****************************

  4. Leo Lichtman said:


    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Many are specified in the little pamphlets that come with parts.
    Whether they are required I don't know.

    JT

    ****************************
    Remove "remove" to reply
    Visit http://www.jt10000.com
    ****************************

  5. Leo Lichtman said:


    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Many are specified in the little pamphlets that come with parts.
    Whether they are required I don't know.

    JT

    ****************************
    Remove "remove" to reply
    Visit http://www.jt10000.com
    ****************************

  6. Sheldon Brown said:

    However, I don't know of any such gasketed interfaces on bicycles.

    A Rohloff Speedhub has one (not that it needs to be fussed
    with in normal use). The gasket is part 5 in the diagram at
    http://tinyurl.com/azqha

    The cap is held on with 8 screws, which the manual says to
    tighten in a cross pattern (and lists a torque spec).

    Tom Ace

  7. Sheldon Brown said:

    However, I don't know of any such gasketed interfaces on bicycles.

    A Rohloff Speedhub has one (not that it needs to be fussed
    with in normal use). The gasket is part 5 in the diagram at
    http://tinyurl.com/azqha

    The cap is held on with 8 screws, which the manual says to
    tighten in a cross pattern (and lists a torque spec).

    Tom Ace

  8. Sheldon Brown said:

    However, I don't know of any such gasketed interfaces on bicycles.

    A Rohloff Speedhub has one (not that it needs to be fussed
    with in normal use). The gasket is part 5 in the diagram at
    http://tinyurl.com/azqha

    The cap is held on with 8 screws, which the manual says to
    tighten in a cross pattern (and lists a torque spec).

    Tom Ace

  9. Leo Lichtman said:

    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Pretty much every bike fastener these days has a recommended torque. Quite
    clearly not just the ones where it's actually necessary -- I mean, for
    christ's sake, you're supposed to tighten the brake lever straps with a
    set torque these days.

    Jasper

  10. Leo Lichtman said:

    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Pretty much every bike fastener these days has a recommended torque. Quite
    clearly not just the ones where it's actually necessary -- I mean, for
    christ's sake, you're supposed to tighten the brake lever straps with a
    set torque these days.

    Jasper

  11. Leo Lichtman said:

    "Sheldon Brown" wrote: (clip) However, I don't know of any such gasketed
    interfaces on bicycles.
    ^^^^^^^^^^^^^^^^^^
    Sheldon, it isn't only gasketed connections that are tightened to specified
    torques. Other examples would be con rod bearing caps, and wheel lug nuts.
    The repair manual for an automobile gives the required torque where it is
    required.

    So, this would be a clue: are there any specified torques for bicycles?

    Pretty much every bike fastener these days has a recommended torque. Quite
    clearly not just the ones where it's actually necessary -- I mean, for
    christ's sake, you're supposed to tighten the brake lever straps with a
    set torque these days.

    Jasper

  12. Andrew Price said:

    After real tight comes real loose !

    Yes, I remeber my first incident many years ago. I was trying to
    tighten up a cinelli 1A stem to my " not cinelli" bar. It was a nitto
    bar. I was poor and inexperienced. Also, there was no internet, no
    rec.bicycles and no Harris cyclery website to consult about this
    matters. noticing that may bars wouldn't be tight enough, I kept
    turning the allen wrench. That was my first experience with real loose.
    A torque wrench wouldn't have prevented the problem though.

    Andres

  13. Andrew Price said:

    After real tight comes real loose !

    Yes, I remeber my first incident many years ago. I was trying to
    tighten up a cinelli 1A stem to my " not cinelli" bar. It was a nitto
    bar. I was poor and inexperienced. Also, there was no internet, no
    rec.bicycles and no Harris cyclery website to consult about this
    matters. noticing that may bars wouldn't be tight enough, I kept
    turning the allen wrench. That was my first experience with real loose.
    A torque wrench wouldn't have prevented the problem though.

    Andres

  14. Andrew Price said:

    After real tight comes real loose !

    Yes, I remeber my first incident many years ago. I was trying to
    tighten up a cinelli 1A stem to my " not cinelli" bar. It was a nitto
    bar. I was poor and inexperienced. Also, there was no internet, no
    rec.bicycles and no Harris cyclery website to consult about this
    matters. noticing that may bars wouldn't be tight enough, I kept
    turning the allen wrench. That was my first experience with real loose.
    A torque wrench wouldn't have prevented the problem though.

    Andres

  15. Leo Lichtman said:

    "Qui si parla Campagnolo" wrote: (clip) every decent, non-car dealer'
    wrench I have ever talked to uses a torque wrench on things like drive train
    bolts and head bolts. IT is NOT a rudimentary part of mechanical skill.
    (clip)
    ^^^^^^^^^^^^^^^^^
    Please read what I said. I did NOT say that good mechanics NEVER use torque
    wrenches. Critical applications like head bolts, bearing cap bolts, etc
    need to be torqued to spec. However, if any mechanic insisted on torquing
    all the bolts on every job, he would be so slow he'd be out on his ear.
    People who work with tools develop a "feel" for tightening torque.

    Please tell me what kind of torque wrench you carry on your bike, since you
    say you need it to make roadside repairs reliably.

    I never said I needed to make roadside repairs. I have not needed any
    tool except for a phillips head for a loose cleat for over 15 years of
    riding. I carry no tools of any kind, never had, never needed them. Not
    even a patch kit or tire lever, since I use tubulars.

  16. Leo Lichtman said:

    "Qui si parla Campagnolo" wrote: (clip) every decent, non-car dealer'
    wrench I have ever talked to uses a torque wrench on things like drive train
    bolts and head bolts. IT is NOT a rudimentary part of mechanical skill.
    (clip)
    ^^^^^^^^^^^^^^^^^
    Please read what I said. I did NOT say that good mechanics NEVER use torque
    wrenches. Critical applications like head bolts, bearing cap bolts, etc
    need to be torqued to spec. However, if any mechanic insisted on torquing
    all the bolts on every job, he would be so slow he'd be out on his ear.
    People who work with tools develop a "feel" for tightening torque.

    Please tell me what kind of torque wrench you carry on your bike, since you
    say you need it to make roadside repairs reliably.

    I never said I needed to make roadside repairs. I have not needed any
    tool except for a phillips head for a loose cleat for over 15 years of
    riding. I carry no tools of any kind, never had, never needed them. Not
    even a patch kit or tire lever, since I use tubulars.

  17. Leo Lichtman said:

    "Qui si parla Campagnolo" wrote: (clip) every decent, non-car dealer'
    wrench I have ever talked to uses a torque wrench on things like drive train
    bolts and head bolts. IT is NOT a rudimentary part of mechanical skill.
    (clip)
    ^^^^^^^^^^^^^^^^^
    Please read what I said. I did NOT say that good mechanics NEVER use torque
    wrenches. Critical applications like head bolts, bearing cap bolts, etc
    need to be torqued to spec. However, if any mechanic insisted on torquing
    all the bolts on every job, he would be so slow he'd be out on his ear.
    People who work with tools develop a "feel" for tightening torque.

    Please tell me what kind of torque wrench you carry on your bike, since you
    say you need it to make roadside repairs reliably.

    I never said I needed to make roadside repairs. I have not needed any
    tool except for a phillips head for a loose cleat for over 15 years of
    riding. I carry no tools of any kind, never had, never needed them. Not
    even a patch kit or tire lever, since I use tubulars.

  18. Sheldon Brown said:
    Peter Chisholm said:


    I'm a bike mechanic, not a car mechanic but every decent, non-car
    dealer' wrench I have ever talked to uses a torque wrench on things
    like drive train bolts and head bolts. IT is NOT a rudimentary part of
    mechanical skill. It is the lazy mechanic that doesn't take the few
    extra seconds to use a torque wrnch instead of just a 'wrench'. The
    difference between a good mechanic and a great one.

    Yes, I've long maintained that torque wrenches are automotive tools.

    I'm not sure what you mean by "drive train bolts" but certainly it is
    proper to use a torque wrench on head bolts or other applications that
    rely on gaskets getting crushed just the right amount.

    However, I don't know of any such gasketed interfaces on bicycles.

    You have long talked about no need for torque wrenches on a bicycle,
    for things like crank bolts and I continue to not understand -why NOT
    use one for crank bolts?

    As for drivetrain, I woud hope the dude putting my driveshaft/rear
    end/pinion gears back together on my truck uses a torque wrench..no
    gaskets involved, just important things like the drive shaft.

    Quoted message said:


    Sheldon "http://sheldonbrown.com/tork-grip" Brown
    +-------------------------------------------------+
    | Men have become the tools of their tools. |
    | -- Henry David Thoreau |
    +-------------------------------------------------+
    Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041
    http://harriscyclery.com
    Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com

  19. Sheldon Brown said:
    Peter Chisholm said:


    I'm a bike mechanic, not a car mechanic but every decent, non-car
    dealer' wrench I have ever talked to uses a torque wrench on things
    like drive train bolts and head bolts. IT is NOT a rudimentary part of
    mechanical skill. It is the lazy mechanic that doesn't take the few
    extra seconds to use a torque wrnch instead of just a 'wrench'. The
    difference between a good mechanic and a great one.

    Yes, I've long maintained that torque wrenches are automotive tools.

    I'm not sure what you mean by "drive train bolts" but certainly it is
    proper to use a torque wrench on head bolts or other applications that
    rely on gaskets getting crushed just the right amount.

    However, I don't know of any such gasketed interfaces on bicycles.

    You have long talked about no need for torque wrenches on a bicycle,
    for things like crank bolts and I continue to not understand -why NOT
    use one for crank bolts?

    As for drivetrain, I woud hope the dude putting my driveshaft/rear
    end/pinion gears back together on my truck uses a torque wrench..no
    gaskets involved, just important things like the drive shaft.

    Quoted message said:


    Sheldon "http://sheldonbrown.com/tork-grip" Brown
    +-------------------------------------------------+
    | Men have become the tools of their tools. |
    | -- Henry David Thoreau |
    +-------------------------------------------------+
    Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041
    http://harriscyclery.com
    Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com

  20. Sheldon Brown said:
    Peter Chisholm said:


    I'm a bike mechanic, not a car mechanic but every decent, non-car
    dealer' wrench I have ever talked to uses a torque wrench on things
    like drive train bolts and head bolts. IT is NOT a rudimentary part of
    mechanical skill. It is the lazy mechanic that doesn't take the few
    extra seconds to use a torque wrnch instead of just a 'wrench'. The
    difference between a good mechanic and a great one.

    Yes, I've long maintained that torque wrenches are automotive tools.

    I'm not sure what you mean by "drive train bolts" but certainly it is
    proper to use a torque wrench on head bolts or other applications that
    rely on gaskets getting crushed just the right amount.

    However, I don't know of any such gasketed interfaces on bicycles.

    You have long talked about no need for torque wrenches on a bicycle,
    for things like crank bolts and I continue to not understand -why NOT
    use one for crank bolts?

    As for drivetrain, I woud hope the dude putting my driveshaft/rear
    end/pinion gears back together on my truck uses a torque wrench..no
    gaskets involved, just important things like the drive shaft.

    Quoted message said:


    Sheldon "http://sheldonbrown.com/tork-grip" Brown
    +-------------------------------------------------+
    | Men have become the tools of their tools. |
    | -- Henry David Thoreau |
    +-------------------------------------------------+
    Harris Cyclery, West Newton, Massachusetts
    Phone 617-244-9772 FAX 617-244-1041
    http://harriscyclery.com
    Hard-to-find parts shipped Worldwide
    http://captainbike.com http://sheldonbrown.com

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