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clean threads on crank puller

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clean threads on crank puller

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Old 11-07-12, 10:14 PM
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Chris Chicago
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clean threads on crank puller

looks like I have some aluminum in the first thread or so of my crank puller. cant seem to get it to engage the threads of the crank arm. what's the easiest way to clean out the threads of the puller? or is there one?

thanks
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Old 11-07-12, 11:02 PM
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Alu being so soft will pull out and clog threaded fittings, crank pullers under high preasure included. A common way to clean Alu out of threads is with a pick. A sharpened spoke can serve as a pick. Chasers or dies also will clean up clogged threads but finding one in the right spec could be hard. Try a pick or knife tip. Andy.
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Old 11-08-12, 01:45 AM
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A File Card. [its for cleaning file teeth, not 3x5 paper]
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Old 11-08-12, 01:47 AM
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I take a brass brush to mine. I usually call it the metal toothbrush.
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Old 11-08-12, 09:40 AM
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i have a metal toothbrush but it didnt seem to do much. i tried a small flat head screwdriver and was able to dig out about half of it. still there is about a qtr turn that is all gunked up left. tedious with the screwdriver.
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Old 11-08-12, 10:49 AM
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dental tools. don't tell how I got them... my hygenist make me promise to never put them into any mouth. i had no problem agreeing to those terms. great tools for fine cleaning, scraping, lubrication and the like...
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Old 11-08-12, 11:19 AM
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I picked up this set at Harbor Freight:
http://www.harborfreight.com/4-piece-pick-and-hook-set-66836.html
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Old 11-08-12, 11:20 AM
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Try heating the tool, dissimilar metals expand at different temps and heating is an effective way of loosening stunk-on gunk.
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Old 11-08-12, 11:45 AM
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Originally Posted by CACycling View Post
I just may get those and send them to my cousin the dentist
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Old 11-08-12, 11:47 AM
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Originally Posted by cale View Post
Try heating the tool, dissimilar metals expand at different temps and heating is an effective way of loosening stunk-on gunk.

interesting. anyone ever try this? looks like alu expands faster but would that pop it out or wedge it in tighter...
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Old 11-08-12, 11:59 AM
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Don't forget to lube the crank threads the next time you use it. Then thread it in by hand until the last 1/2 turn or so. If you need a wrench to thread it in STOP and figure out what is wrong.
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Old 11-08-12, 12:18 PM
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sound advice
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Old 11-08-12, 02:30 PM
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One of the handiest tools you can own is a triangular file. The 60° angle is good for cleaning threads, and things like deburring seat tube slots, plus all kinds of things you'll find to use it for.
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Old 11-08-12, 05:25 PM
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Originally Posted by Chris Chicago View Post
interesting. anyone ever try this? looks like alu expands faster but would that pop it out or wedge it in tighter...
Heat is used to free stuck bolts by heating, then allowing to cool. The expansion and subsequent contraction helps break the bonded surfaces apart. Aluminum also shrinks faster than steel when cooled. If you can't clean it with a pick, you could try heating, then cooling the part rapidly. I would suggest using something like this for the cooling part:

http://www.mcmelectronics.com/produc...FUlxQgodcUcA-w

In my part of the world, you can find this at Fry's Electronics. In places where you don't have the glorious electronics supermarket that is Fry's, a local electronics supplier may have this too.
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Old 11-08-12, 11:54 PM
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I've had good luck clamping a folded rag onto the tool with vice grips and unthreading the tool from the vice grips.
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Old 11-09-12, 11:43 AM
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i ended up continuing with mini screw driver. got it down to about 1/8 turn clogged and used the file to sand it from there. not sure i got all the alu 100% out but it works now. though i worry that the little bit in there could screw up threads and wonder if I should buy a new one
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Old 11-09-12, 01:00 PM
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I would just use my bench mounted wire wheel. if you dont have such a wheel hardware stores sell an assortment of wire wheels to go in a drill chuck.
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Old 11-10-12, 06:54 AM
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Originally Posted by Chris Chicago View Post
i ended up continuing with mini screw driver. got it down to about 1/8 turn clogged and used the file to sand it from there. not sure i got all the alu 100% out but it works now. though i worry that the little bit in there could screw up threads and wonder if I should buy a new one
Just lube it a bit before use, always screw it in all the way and you should be fine.
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