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Post by bezzer on Feb 8, 2018 8:15:09 GMT 1
Gents, Do any of you know what size thread the primary drive side of the crank is on a 4L0?. Pitch looks very fine.
Looks like mine has suffered whilst in transit and ‘flatted’ a couple of the threads off ☹️
Thanks in advance bezzer
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Post by JonW on Feb 8, 2018 23:10:21 GMT 1
you can use a thread file or a small thin edged file if youre careful. take your time and just work the thread until it works again.
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Post by steeley on Feb 9, 2018 6:35:32 GMT 1
Hi , as jonw said get hold of a metric thread file some have an internal thread repair file on the end of each thread face. This can be used as a pitch gauge .
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Post by bezzer on Feb 9, 2018 7:53:36 GMT 1
Hi jonw/ steeley , Many thanks for your replies. I was hoping to get a die-nut in the correct size, but may have to consider the thread file route.
My concern is 3 of the thread ‘peaks’ are pretty flattened, and I’m afraid that removing metal to restore the ‘troughs’ will leave the thread thin and therefore weak in that area.
Thanks again bezzer
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Post by stusco on Feb 9, 2018 8:24:18 GMT 1
You can measure the diameter and measure the distance between peaks so you can easily work out the thread size assuming it’s metric,but I would just file it a die nut might just rip the damaged threads off!
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Post by Tobyjugs on Feb 9, 2018 14:26:30 GMT 1
post a picture of the damage. I'm fairly certain that it will be ok.
Tonight I will measure the thread and try and identify it for you
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Post by bezzer on Feb 9, 2018 17:31:42 GMT 1
post a picture of the damage. I'm fairly certain that it will be ok. Tonight I will measure the thread and try and identify it for you Thanks Tony, I am struggling to post up photos on the forum, but could send via WhatsApp if you have it?. |
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Post by rich on Feb 9, 2018 20:24:06 GMT 1
If you have a spare primary nut, might be worth getting a hacksaw blade and cutting some slots across the threads. You could then try running this onto the crank as the slots will hopefully clean up the threads but shouldn't cause any damage.
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Post by bezzer on Feb 9, 2018 20:31:19 GMT 1
Cheers rich, Another good suggestion to try. I have sent the photos to Tobyjugs via WhatsApp so hopefully he may be able to post them up for everyone’s perusal.
ATB bezzer
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Post by Tobyjugs on Feb 9, 2018 22:36:38 GMT 1
Here is Bezzer's damaged crank thread.  The thread is M16 x 1.00 |
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Post by bezzer on Feb 9, 2018 22:50:18 GMT 1
Thanks mate 👍🏻, I must try to master posting pics up! 😊, I’m a complete Luddite! Lol
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Post by JonW on Feb 9, 2018 22:57:45 GMT 1
about 10secs with a thread file would fix that, just go buy one they are not hard to find.
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Post by steeley on Feb 10, 2018 6:32:10 GMT 1
Hi , a thread file will sort that out with no problem . I restored a buggered thread on my rgv250 rear wheel spindle which was bad. Also if you had a spare drive side nut you could cut through the one side . Turn it into a split die . Run it down the thread then put a pair of mole grips on the nut to tighten it up and undo it . A long gone friend gave me that tip .
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Post by bezzer on Feb 10, 2018 7:00:01 GMT 1
Thanks for all of your replies and advice lads, I now know that it’s recoverable and which way to proceed with it.
Thanks again to Tobyjugs for posting the pic.
👍🏻 bezzer
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