Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 28
  1. #1
    Senior Member
    Join Date
    Oct 2009
    Location
    England, currently dividing my time between university in Guildford and home just outside Reading
    My Bikes
    Too many to list here!
    Posts
    1,769
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Square-taper crank creaking...

    Yesterday, whiile riding my Saracen MTB, I noticed the cranks creaking whenever I pressed down on the left-hand pedal. I didn't think anything of it at the time, but when I got home, I decided to try a quick test. Pushing the left pedal down fairly hard with the left crank pointing forward made the crank creak once, but then it didn't do it again until I pressed the cranks the other way, I.E left-hand crank pointing backward, hold right-hand crank and press down on left-hand crank. Again, it only creaked once, until I turned the cranks through 180 degrees and pressed again. Each time it creaks, I think the cranks move ever so slightly relative to each other (about half a degree, I reckon). Correct me if I'm wrong, but does that sound like one of the cranks is loose? They're fairly old Shimano Alivio cranks, the bottom bracket is a cartridge one, and I've had the bike several months with no problems from them. Any suggestions as to why this is happening now, and more importantly, how to stop it?

    Thanks in advance

  2. #2
    Senior Member DannoXYZ's Avatar
    Join Date
    Jul 2005
    Location
    Saratoga, CA
    Posts
    11,496
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Remove the crankarm.
    Clean the taper on the spindle.
    Clean the hole in the crank.
    Put a drop of oil on each flat of the taper on the spindle.
    Re-install crankarm
    Tighten crankarm bolt to the proper torque using a torque-wrench.
    Post on here what torque-reading you used.

    Go test bike, no creaks!!!

  3. #3
    Extra Medium Member redtires's Avatar
    Join Date
    Jul 2006
    Location
    Louisville, Co
    My Bikes
    Fuji Roubaix 1.0 (Sampson Kalispell Ti GONE); VooDoo Wanga (Specialized Stumpy: GONE)
    Posts
    1,581
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If that doesn't fix it, it also may be the bottom bracket. Once you have the cranks off, you may as well pull it and do some "house cleaning" in your bottom bracket shell...it's very good preventative maintenance.
    Coming to you from and brought to you by:
    Department of redundancy department.

  4. #4
    Senior Member
    Join Date
    Mar 2008
    Location
    PNW (PDX)
    My Bikes
    1999 Lightspeed Classic, Specialized Stumpjumper
    Posts
    182
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DannoXYZ View Post
    Remove the crankarm.
    Clean the taper on the spindle.
    Clean the hole in the crank.
    Put a drop of oil on each flat of the taper on the spindle.
    Re-install crankarm
    Tighten crankarm bolt to the proper torque using a torque-wrench.
    Post on here what torque-reading you used.

    Go test bike, no creaks!!!
    I'm pretty sure that lubricating the flats of the spindle is a big no-no. Torquing the crank arms on to spec should be sufficient to prevent any movement (which is what causes the creaking noise).

    Once the cranks are on securely, any creaking may be coming from the bottom bracket. My lightspeed had a BB creak, I finally got rid of it by removing and cleaning the threads on the BB and the cartridge. When I reinstalled, I greased the BB threads and also applied plumber's teflon tape to the cartridge threads, then torqued it to spec.
    Check out my UltraEndurance blog for ride reports, equipment reviews, and philosophical ramblings...

    "I just assume I'm not invisible. I assume I'm wearing fluorescent clothes, and there's a million-dollar bounty going to the first driver who manages to hit me. And I ride on that assumption."
    -- Zodiac, Neal Stephenson

  5. #5
    Member
    Join Date
    Apr 2011
    Posts
    42
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kenl666 View Post
    I'm pretty sure that lubricating the flats of the spindle is a big no-no. Torquing the crank arms on to spec should be sufficient to prevent any movement (which is what causes the creaking noise).
    Actually, not lubricating the spindle square is the big no-no. Without lube, tightening torque measurements are pretty much moot. Even worse, the fit between spindle and crank will be considerably looser w/o lube at a given torque. This will be most pronounced with used/old cranks and spindles with corrosion-caused increased roughness of the surfaces.

    I would recommend using a (salt)water resistant heavy grease rather than oil; the grease will help in preventing corrosion between spindle and crank which is the most common reason for stuck cranks.

    Fears that one could damage or even split cranks by tightening are unfounded; long before that you'd strip the threads of the tightening screw.

    But even with lube, proper tightening and in the absence of corrosion, the hole in the crank will get deformed over time by fretting damage. If creaking and measurable movement of the cranks on the spindle cannot be remedied anymore by cleaning/lubing/retightening, the cranks likely are toast.

  6. #6
    Senior member Dan Burkhart's Avatar
    Join Date
    Oct 2004
    Location
    Oakville Ontario
    Posts
    4,693
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Oh goody, a square taper grease/no grease thread. Haven't had one of those in a long time.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  7. #7
    Member
    Join Date
    Apr 2011
    Posts
    42
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dan Burkhart View Post
    Oh goody, a square taper grease/no grease thread. Haven't had one of those in a long time.
    I wasn't aware there was any serious discussion potential in that....whatever lube one puts in there, the forces created by pedaling are high enough to replace any lubricant in a short time, resulting in metal-to-metal contact. There is not even theoretical room for lube induced problems on that joint. (As opposed to quill stems!)

  8. #8
    Senior Member Chop61's Avatar
    Join Date
    Oct 2007
    Location
    Atlanta, GA
    My Bikes
    Pinarello Road, Surly LHT, Dolan Track, Fuji Supreme, Guru Ti Tri, Bamboo
    Posts
    224
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Oy Vey. Barnett's says no grease. Here we go!
    When I was young I prayed to God for a new bike. Then I figured out God didn't work that way, so I stole one and prayed for forgiveness.

  9. #9
    Senior member Dan Burkhart's Avatar
    Join Date
    Oct 2004
    Location
    Oakville Ontario
    Posts
    4,693
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Woodwind314 View Post
    I wasn't aware there was any serious discussion potential in that....whatever lube one puts in there, the forces created by pedaling are high enough to replace any lubricant in a short time, resulting in metal-to-metal contact. There is not even theoretical room for lube induced problems on that joint. (As opposed to quill stems!)
    You're new hereabouts, aintcha? It's one of those discussions that often takes on religious tones. Both sides have true believers.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  10. #10
    Insane Bicycle Mechanic Jeff Wills's Avatar
    Join Date
    Mar 2008
    Location
    other Vancouver
    Posts
    6,418
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dan Burkhart View Post
    You're new hereabouts, aintcha? It's one of those discussions that often takes on religious tones. Both sides have true believers.
    Yep. I greeza, you no greeza, all-a-same-ee. Can't we all jus' git along?
    Jeff Wills

    All my bikes.

  11. #11
    Senior Member mrrabbit's Avatar
    Join Date
    Dec 2007
    Location
    San Jose, California
    My Bikes
    2001 Tommasini Sintesi w/ Campagnolo Daytona 10 Speed
    Posts
    3,136
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Jeff Wills View Post
    Yep. I greeza, you no greeza, all-a-same-ee. Can't we all jus' git along?
    Let loose the dogs of war!

    =8-)
    4000+ wheels built since 1984...

    Disclaimer:

    1. I do not claim to be an expert in bicycle mechanics despite my experience.
    2. I like anyone will comment in other areas.
    3. I do not own the preexisting concepts of DISH and ERD.
    4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
    5. My all time favorite book is:

    Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life

  12. #12
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    35,703
    Mentioned
    15 Post(s)
    Tagged
    0 Thread(s)
    I'm in the grease the bolt , not the flats of the spindle group,
    what color gang uniform do I wear?

  13. #13
    Senior member Dan Burkhart's Avatar
    Join Date
    Oct 2004
    Location
    Oakville Ontario
    Posts
    4,693
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Has anyone ever thought to ask a tapir if they like to be greased?

    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  14. #14
    Senior Member DannoXYZ's Avatar
    Join Date
    Jul 2005
    Location
    Saratoga, CA
    Posts
    11,496
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The grease versus no-grease battle never ends. One major manufacturer recommends grease. Their main competitor, another major manufacturer recommends no-grease. I split the difference and use oil.

  15. #15
    Member
    Join Date
    Apr 2011
    Posts
    42
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dan Burkhart View Post
    You're new hereabouts, aintcha? It's one of those discussions that often takes on religious tones. Both sides have true believers.
    True, I'm new to this forum. Sorry for fanning religious flames!

    I come from background with boats, and there are some rules cast in iron. One of them is: Any junction between metals, especially different metals, either gets greased or gets destroyed by corrosion within a few years.

    As I happen to ride my bike in the winter too, everything there will get some salt water exposure....When I bought my current bike (used), I didn't take everything apart. That was a mistake - 2 Years later I wanted to change cranks...no luck. Had to cut off the BB spindle. After hammering out the stumps from the cranks, one could see thick layers of white aluminium oxide everywhere in the junction. Proof enough for me.

    Note that the grease is not there to insulate the 2 materials, but rather to prevent water from entering the junction.

  16. #16
    Senior Member powitte's Avatar
    Join Date
    Mar 2008
    Location
    Chicago
    Posts
    179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Try it without grease. If it stops the creaking, good. If not, try some grease/oil and reassess ?

  17. #17
    Senior Member DannoXYZ's Avatar
    Join Date
    Jul 2005
    Location
    Saratoga, CA
    Posts
    11,496
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by powitte View Post
    Try it without grease. If it stops the creaking, good. If not, try some grease/oil and reassess ?
    Sure you can do that, and in many cases, you end up having to do this operation twice, once without and once with. The grease really is not a substitute for no-grease installation, but rather is an addition to the no-grease for more out-of-spec or severe usage. For example, most of the time in most bolted interfaces, one does not need a lockwasher. And it works most of the time under the intended loads. However, in many cases, and in cases where higher safety is required, a lockwasher and safety-wire is specified. This will not change the operation of the joint in any way, but mitigates against those rare and out-of-spec instances. Such as racing cars or motorcycles.

    So the grease on the taper is for cases that are out of the ordinary. It doesn't hurt normal operations in anyway, but if you have an installation with salt-water, or if manufacturing tolerances are on the loose or out-of-spec range, then the grease deals with those instances. I've seen many crank+spindle combinations that simply do not work as intended. Brand-new out of the box crank and spindle will creak or come loose even with the bolt tightened to specified torque (using more than specified torque is not a solution). In those cases, extra steps are needed, such as grease to help the out-of-spec taper on crank & spindle mate better. Or a star-lockwasher + Loctite in cases where the bolt works loose even with proper torque.

    Also kenl666 pointed out another area that causes creaks, the BB in the loose threads of the BB-shell. Although airburst's test of hopping on the crank and rotating 180-degrees (rocks the crankarm back & forth around the spindle), indicates it's more likely the crankarm-to-spindle interface.
    Last edited by DannoXYZ; 04-13-11 at 02:39 PM.

  18. #18
    Member rwhite2's Avatar
    Join Date
    Jul 2006
    Location
    Northern Colorado
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dan Burkhart View Post
    Has anyone ever thought to ask a tapir if they like to be greased?

    I bet a greased tapir race would be similar to a greased pig race. Could the organizer of a greased tapir race be called a "tapir race setter"?

  19. #19
    Senior Member kmv2's Avatar
    Join Date
    Oct 2008
    My Bikes
    Bianchi circa late 1980s, Surly Cross Check, Kona Blast
    Posts
    695
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Check your if everything is tight, especially chainring bolts (nobody mentioned that??)

    Hold each pedal and try to move them not rotationally but axially/radially to see if there is play which would suggest a loose bearing cup or worn bearings.

    The noise will probably not manifest itself with just your hand pressing down, as the force of your foot is many times greater, but you will be able to get feedback and feel if anything is not as it should be.. that being noticeable radial and axial play.

    Grease or no grease, check the mechanical state of the components first.

  20. #20
    Member
    Join Date
    Apr 2011
    Posts
    42
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kmv2 View Post
    Check your if everything is tight, especially chainring bolts (nobody mentioned that??)
    Indeed! Often overlooked....Yesterday I changed cranks back from compact to my normal 52/39, adjusted the FD, everything is as smooth as can be, but riding I get these strange noises from time to time...and I can't put power on in the big chainring, chain starts to rub the FD....what the f***?

    Back home I put the bike in the stand only to discover the chainring bolts are all completely loose. I simply forgot to tighten them at all!

  21. #21
    I'm Carbon Curious 531phile's Avatar
    Join Date
    Aug 2005
    Location
    Earthquake Central
    My Bikes
    Enough
    Posts
    2,196
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DannoXYZ View Post
    Remove the crankarm.
    Clean the taper on the spindle.
    Clean the hole in the crank.
    Put a drop of oil on each flat of the taper on the spindle.
    Re-install crankarm
    Tighten crankarm bolt to the proper torque using a torque-wrench.
    Post on here what torque-reading you used.

    Go test bike, no creaks!!!
    I do this with grease instead of oil. Rule of thumb to get rid or noise: clean, oil/grease, and tighten to spec

    Quote Originally Posted by avner View Post
    I loled. Twice. Then I cried. Then I rubbed one out and cried again, but thanks for sharing.

  22. #22
    Senior Member
    Join Date
    Feb 2009
    Posts
    3,799
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kenl666 View Post
    I'm pretty sure that lubricating the flats of the spindle is a big no-no. Torquing the crank arms on to spec should be sufficient to prevent any movement (which is what causes the creaking noise).

    Once the cranks are on securely, any creaking may be coming from the bottom bracket. My lightspeed had a BB creak, I finally got rid of it by removing and cleaning the threads on the BB and the cartridge. When I reinstalled, I greased the BB threads and also applied plumber's teflon tape to the cartridge threads, then torqued it to spec.
    http://draco.nac.uci.edu/rbfaq/FAQ/8f.11.html

  23. #23
    Senior Member kmv2's Avatar
    Join Date
    Oct 2008
    My Bikes
    Bianchi circa late 1980s, Surly Cross Check, Kona Blast
    Posts
    695
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Woodwind314 View Post
    Indeed! Often overlooked....Yesterday I changed cranks back from compact to my normal 52/39, adjusted the FD, everything is as smooth as can be, but riding I get these strange noises from time to time...and I can't put power on in the big chainring, chain starts to rub the FD....what the f***?

    Back home I put the bike in the stand only to discover the chainring bolts are all completely loose. I simply forgot to tighten them at all!
    Its something I often find loosens over time if you dont use some sort of threadlocking compound (which I would not recommend even if it prevents the problem because its not always easy to fit that special chainring screwdriver on and get a good hold on it).

    Anyways, that IMO is usually the cause of creaking in the BB/crank area.

  24. #24
    Senior Member
    Join Date
    Mar 2008
    Location
    PNW (PDX)
    My Bikes
    1999 Lightspeed Classic, Specialized Stumpjumper
    Posts
    182
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I wasn't aware that there was such a big brouhaha regarding the issue of whether or not to grease the crank spindle flats, so I did some research:

    Sutherland's Handbook For Bicycle Mechanics 6ed pg. 2-4:
    "The spindle end and the hole in the crank must be clean and dry. Do not use oil, grease, or an anti-seize compound. The tapered square system depends on the crank coming up firmly on the spindle. Any lubrication will cause the arm to go on too far in tightening or to float on the spindle... Grease or anti-seize compound may be used on the threads of the crank bolt."

    Barnett's manual of Bicycle Repair pg. 20-11:
    "...prepare the arm for installation by cleaning the mating surfaces of the spindle and arm with acetone or alcohol. The purpose of this is to remove any traces of lubricant. Since these two pieces are held together by friction, grease or oil may enable the arm to go on further (not necessarily a good idea)... Crank manufacturers are unanimous in recommending against lubrication of the spindle when mounting the arm."

    Zinn & the Art of Road Bike Maintenance, 3ed, pg. 210:
    "With square-taper spindles, clean off all grease from both parts with a rag and citrus-based solvent. Greasing the axle may allow the soft aluminum crank to slide too far onto the hard steel or titanium axle and could deform the square hole in the crank."

    Big Blue Book of Bicycle Repair, pg. 68:
    "Aluminum cranks typically do not require lubrication of this press fit. Aluminum by its nature is covered with a thin layer of oxidation, which acts as self-lubrication... If a crank creaks even at full torque, remove and grease the pressed surfaces."
    Check out my UltraEndurance blog for ride reports, equipment reviews, and philosophical ramblings...

    "I just assume I'm not invisible. I assume I'm wearing fluorescent clothes, and there's a million-dollar bounty going to the first driver who manages to hit me. And I ride on that assumption."
    -- Zodiac, Neal Stephenson

  25. #25
    Insane Bicycle Mechanic Jeff Wills's Avatar
    Join Date
    Mar 2008
    Location
    other Vancouver
    Posts
    6,418
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kenl666 View Post
    I wasn't aware that there was such a big brouhaha regarding the issue of whether or not to grease the crank spindle flats, so I did some research:
    Hmmm... good selection of quotes there, but in my 30 years of working on bikes I've never had a crank deform to point of uselessness when the flats are lubricated and the bolt torqued to spec. I've seen plenty ruined due to insufficient torque, though, but that's been because of lack of correct tools or mechanical training.

    As Danno said above- lubricant helps if the interface isn't perfect. If the tapers on the crank and spindle were a perfect fit, then there would be no problem. However, manufacturing tolerances being what they are I'd say that a bit of lubrication is prudent.

    (Gonna do RAO? George and Terri put on a heck of an event.)
    Jeff Wills

    All my bikes.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •