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Re: RH/L:H pedal threads

Started by Werehatrack · · Last activity · 13 posts · 360 views

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Cycling Equipment
Published
9 April 2005
Last activity
10 April 2005
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Werehatrack
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13
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  1. Leo Lichtman said:

    Why are pedals threaded RH on the right side, and LH on the left side?

    Because if the left pedal was RH thread, it would unscrew. This had
    already been discovered by the time the 1908 Sears catalog was
    published. (IIANM, there were a couple of guys named Wright who came
    up with this as the solution to the "left pedal keeps falling out"
    problem.)

    Quoted message said:

    If
    the idea is to keep the pedals from working loose as you ride, I think
    they've got it backwards.

    Try it and see. Build a left-drive fixie.

    Quoted message said:

    The torque applied to the pedal shafts by the
    bearing friction, in the existing system, tends to loosen them. But that
    friction is so low compared to the tightness of a properly installed pedal
    that I don't think you could unscrew a pedal by spinning it.

    What am I missing?

    The reason for the loosening. It's not torque on the shaft, it's
    orbital motion in the thread interface. The shaft doesn't unscrew due
    to torque from pedal rotation, it walks out due to the side force on
    the shaft as it rotates.

    Car lug nuts stopped needing left hand threads on the left side of the
    vehicle when the conical-face lug nut was perfected, but Chrysler
    (with it's conservative belt-and-suspenders approach to engineering)
    continued to use it all the way up into the '70s, as I recall. Their
    justification was that if the left nuts weren't fully tight, the LH
    threads would tend to keep the nuts from coming off as readily.

    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  2. On Sat, 09 Apr 2005 16:21:48 GMT, Werehatrack
    <[email hidden]> wrote:

    [snip]

    Quoted message said:

    Car lug nuts stopped needing left hand threads on the left side of the
    vehicle when the conical-face lug nut was perfected, but Chrysler
    (with it's conservative belt-and-suspenders approach to engineering)


    ^^^^
    [snip]

    Dear Werehatrack,

    Normally I resist the urge, but . . .

    An excellent spot for a conservative belt-and-suspenders
    approach to the normally unpunctuated possessive pronoun!

    C'arl Fogel

  3. Quoted message said:

    On Sat, 09 Apr 2005 16:21:48 GMT, Werehatrack
    <[email hidden]> wrote:

    [snip]

    Quoted message said:

    Car lug nuts stopped needing left hand threads on the left side of the
    vehicle when the conical-face lug nut was perfected, but Chrysler
    (with it's conservative belt-and-suspenders approach to engineering)


    ^^^^
    [snip]

    Dear Werehatrack,

    Normally I resist the urge, but . . .

    An excellent spot for a conservative belt-and-suspenders
    approach to the normally unpunctuated possessive pronoun!

    When my XMIL adamantly stated that there was no sentence that could be
    cosntructed in the English language which demonstrated the use of
    "its" in a possessive manner, I said "Your statement shows that you
    are unfamiliar with the problem faced by spell-checker programmers who
    must devise a way for a piece of code to determine which of it's its
    are to be used for comparison in a block of text." (Apostrophicated
    possessive intentional.) She was flummoxed; apparently, in 40 years
    of teaching, no one had even managed to show that the rule *could*
    have an exception. (I generally adhere to the common usage, but I
    would prefer regularization of the language by adoption of a different
    rule; the contraction of "it is" should only be used where it will not
    produce an ambiguity about the possible presence of the possessive of
    "it", and "it's" should then become the possessive form.)
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  4. Werehatrack said:
    Quoted message said:

    On Sat, 09 Apr 2005 16:21:48 GMT, Werehatrack
    <[email hidden]> wrote:

    [snip]

    Quoted message said:

    Car lug nuts stopped needing left hand threads on the left side of the
    vehicle when the conical-face lug nut was perfected, but Chrysler
    (with it's conservative belt-and-suspenders approach to engineering)


    ^^^^
    [snip]

    Dear Werehatrack,

    Normally I resist the urge, but . . .

    An excellent spot for a conservative belt-and-suspenders
    approach to the normally unpunctuated possessive pronoun!

    When my XMIL adamantly stated that there was no sentence that could be
    cosntructed in the English language which demonstrated the use of
    "its" in a possessive manner, I said "Your statement shows that you
    are unfamiliar with the problem faced by spell-checker programmers who
    must devise a way for a piece of code to determine which of it's its
    are to be used for comparison in a block of text." (Apostrophicated
    possessive intentional.) She was flummoxed; apparently, in 40 years
    of teaching, no one had even managed to show that the rule *could*
    have an exception. (I generally adhere to the common usage, but I
    would prefer regularization of the language by adoption of a different
    rule; the contraction of "it is" should only be used where it will not
    produce an ambiguity about the possible presence of the possessive of
    "it", and "it's" should then become the possessive form.)

    Your sentence fails to demonstrate a possessive use of "it's" because it
    becomes nonsensical if you replace "it's" with "it is". The sentence
    would be more clear if you use the correct form without the apostrophe,
    and place the second "its" in quotes to show that the word refers to
    instances of the word "it", as in:
    "Your statement shows that you unfamiliar with the problem faced by
    spell-checker programmers who must devise a way for a piece of code to
    determine which of its "its" [or its "it's"] are to be used for
    comparison in a block of text."

    I agree that there is a lot of confusion about whether to use "it's" or
    "its" and I am mildly distressed to see college-educated journalists
    make the error, as well as many high-school graduates, and even
    elementary school grads, all of whom have failed to grasp the difference.

    If you wish to use "it's" as the possessive form, be aware that you have
    dared to contradict standard form. Furthermore, you will be confusing
    those whose use "tire's" when they meant to say "tires". Or "tyres".

    Sigh.

    --
    Ted Bennett
    Portland, OR

  5. On Sat, 09 Apr 2005 20:32:19 GMT, Ted <[email hidden]>

    Quoted message said:

    If you wish to use "it's" as the possessive form, be aware that you have
    dared to contradict standard form. Furthermore, you will be confusing
    those whose use "tire's" when they meant to say "tires". Or "tyres".

    The grocer's apostrophication of a plural is both outside of accepted
    usage *and* every bit as irregular as the nonapostrophication of the
    possessive "its"; the apostrophication of the possessive is at least
    in conformance with the accepted pattern of the language rather than a
    deviation from it. As such, the apostrophe in a possessive "it's"
    conforms to the pattern of the language by breaking from accepted
    usage, while the other breaks from both pattern *and* usage.
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  6. Werehatrack said:

    On Sat, 09 Apr 2005 20:32:19 GMT, Ted <[email hidden]>

    Quoted message said:

    If you wish to use "it's" as the possessive form, be aware that you have
    dared to contradict standard form. Furthermore, you will be confusing
    those whose use "tire's" when they meant to say "tires". Or "tyres".

    The grocer's apostrophication of a plural is both outside of accepted
    usage *and* every bit as irregular as the nonapostrophication of the
    possessive "its"; the apostrophication of the possessive is at least
    in conformance with the accepted pattern of the language rather than a
    deviation from it. As such, the apostrophe in a possessive "it's"
    conforms to the pattern of the language by breaking from accepted
    usage, while the other breaks from both pattern *and* usage.

    Dear Werehatrack,

    Er, sorry, but personal pronouns do not use apostrophes to
    form the possessive case in English--his, her, hers, our,
    ours, my, mine, your, yours, their, theirs, its.

    When used with a personal pronoun, the apostrophe's f'r
    contractions (missin' letters), as in I'll, I'd, I've,
    they're, they'd, they'll, he's, he'd, he'll, she's, she'd,
    she'll, we're, we'd, we'll, you're, you'd, you'll, it's,
    it'd, it'll.

    Debate arises occasionally concerning the regional his'n,
    but 'tain't really a possessive apostrophe--'tis just a folk
    contraction of "his one" to "his'n".

    Curiously, while "his'n" is rigidly apostrophized, the
    similar "yourn" and "ourn" never use the contractive
    apostrophe. The reason is that the latter two look familiar
    to our eyes, but "hisn" looks awful without an apostrophe
    because it simply isn't English orthography. (Brutal
    misogyny may account for the lack of an authentic "her'n".)

    There are also the purely phonetic folk spellings, such as
    in "kinda-sorta" for "kind of-sort of" and the amusing
    "should of" and "would of" for "should've" and "would've."

    The last example reminds us that apostrophes are purely
    punctuational--the words sound the same when read aloud.
    'Sblood, Shakespeare was perfectly happy with "Ille" for
    "I'll".

    Carl F'ogel

  7. Quoted message said:

    Er, sorry, but personal pronouns do not use apostrophes to
    form the possessive case in English--his, her, hers, our,
    ours, my, mine, your, yours, their, theirs, its.

    With the exception of his, the rest of the s-forms could be
    regularized, but it's a moot point; the inertia is too great.

    Quoted message said:

    Curiously, while "his'n" is rigidly apostrophized, the
    similar "yourn" and "ourn" never use the contractive
    apostrophe.

    This is not exactly something that has been heavily documented TTBOMK,
    and I've seen your'n used. An then there's "all y'alls", the
    collective second person plural possessive form which just pops the
    breakers on some pedants' circuits by its mere mention.

    Quoted message said:

    The reason is that the latter two look familiar
    to our eyes, but "hisn" looks awful without an apostrophe
    because it simply isn't English orthography. (Brutal
    misogyny may account for the lack of an authentic "her'n".)

    More likely "hers" is just easier to say.

    Quoted message said:

    There are also the purely phonetic folk spellings, such as
    in "kinda-sorta" for "kind of-sort of" and the amusing
    "should of" and "would of" for "should've" and "would've."

    And the even more colloquial "shoulda" and "woulda".

    Quoted message said:

    The last example reminds us that apostrophes are purely
    punctuational--the words sound the same when read aloud.
    'Sblood, Shakespeare was perfectly happy with "Ille" for
    "I'll".

    Middle English was an unruly language; it didn't just borrow from
    other tongues, it followed them home, waited 'til the lights were out,
    broke in, rifled their closets and hauled off anything of value. It
    had few rules because it respected none.
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  8. Quoted message said:

    Er, sorry, but personal pronouns do not use apostrophes to
    form the possessive case in English

    "It" is only technically a *personal* pronoun; this may account for
    much of the tendency to add the tick. It's actually an impersonal
    pronoun.
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  9. "Ted" wrote: (clip) Furthermore, you will be confusing those whose use
    "tire's" when they meant to say "tires". Or "tyres".
    ^^^^^^^^^^^^^^^^^^
    Or the Smiths, who live in a house with a carved redwood sign on the front
    which reads, "The Smith's." To be charitable, I assume they mean, "The
    Smith's (house.)" :-) If you banned the apostrophe from the font of the
    redwood sign engravers, it would do less harm than good.

  10. Leo Lichtman said:


    "Ted" wrote: (clip) Furthermore, you will be confusing those whose use
    "tire's" when they meant to say "tires". Or "tyres".
    ^^^^^^^^^^^^^^^^^^
    Or the Smiths, who live in a house with a carved redwood sign on the front
    which reads, "The Smith's." To be charitable, I assume they mean, "The
    Smith's (house.)" :-) If you banned the apostrophe from the font of the
    redwood sign engravers, it would do less harm than good.

    If we could just get the apostrophe removed from the set of letters
    and symbols supplied with those ugly roadside box signs, it would make
    them slightly more tolerable. The grand prize for idiocy with those,
    however, goes to the people who use an inverted exclamation point in
    place of a letter I (not L, the other one shaped like that) when they
    haven't run out of the letter. The ones who dot a capital I. To me,
    that's worse than apostrophication of a plural. And then there are
    the ones who come up with the incredible gems where they combine those
    two atrocities with homonym errors. I've seen such signs in my
    travels, and I've considered carrying a camera to preserve the record
    of the sightings.
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  11. On 9 Apr 2005 20:56:39 -0700, "Earls61" <[email hidden]>

    Quoted message said:


    Werehatrack said:


    Try it and see. Build a left-drive fixie.

    Ask Sheldon!

    http://sheldonbrown.org/gunnar/index.html

    I was advising doing it with a regular set of cranks flipped to the
    wrong sides. As a demonstration of the pitfall, I doubt that it would
    take long to fail.
    --
    Typoes are a feature, not a bug.
    Some gardening required to reply via email.
    Words processed in a facility that contains nuts.

  12. Werehatrack said:
    Leo Lichtman said:

    Why are pedals threaded RH on the right side, and LH on the left side?

    Because if the left pedal was RH thread, it would unscrew. This had
    already been discovered by the time the 1908 Sears catalog was
    published. (IIANM, there were a couple of guys named Wright who came
    up with this as the solution to the "left pedal keeps falling out"
    problem.)

    Quoted message said:

    If
    the idea is to keep the pedals from working loose as you ride, I think
    they've got it backwards.

    Try it and see. Build a left-drive fixie.

    I did the experiment quite a few years ago, although not with a
    fixed-gear bike. To convert our tandem to a kid-back arrangement I took
    a regular children's crank with the bottom bracket clamped to the rear
    seat tube. The chainring was on the left side so it would be connected
    by chain to the timing chainring on the front crank.

    The pedals were definitely prone to coming loose but applying plenty of
    torque did eventually get them tight enough to stay. Of course our
    daughter wasn't applying all that much force to the pedals at that age.

    Quoted message said:

    The reason for the loosening. It's not torque on the shaft, it's
    orbital motion in the thread interface. The shaft doesn't unscrew due
    to torque from pedal rotation, it walks out due to the side force on
    the shaft as it rotates.

    Agreed.

  13. "Werehatrack" wrote: (clip) I've seen such signs in my travels, and I've
    considered carrying a camera to preserve the record of the sightings.
    ^^^^^^^^^^^^^^^^^^^^^
    I have an album of such pictures. My favorite is a sign stenciled on the
    wall above a row of garbage cans at our local high school. It reads,
    "School trash only. Others will be prosecuted."

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