Hi all

 

I've damaged the thread on this tool, would it be cheaper to just buy a new one, or is there a cheap tap and die set which an make a new thread, if so what size to use

Hi all

 

I've damaged the thread on this tool, would it be cheaper to just buy a new one, or is there a cheap tap and die set which an make a new thread, if so what size to use

https://www.amazon.co.uk/dp/B0948N6P55

https://www.amazon.co.uk/dp/B0948N6P55

 

This one is much cheaper, only £3.49 to be honest reason why I said about making a new thread as I already have 3 of these tools all damaged so wanted to see if i can repair the threads

 

https://ebay.us/m/XZ0k3f

This one is much cheaper, only £3.49 to be honest reason why I said about making a new thread as I already have 3 of these tools all damaged so wanted to see if i can repair the threads

 

https://ebay.us/m/XZ0k3f

It's very important that they have good threaads. If you dtrip the thread in the pedal arm, you have a big problem to get it off.

 

When you use the tool, you must fully unscrew the middle bit before screwing the large thread into the pedal arm.

It's very important that they have good threaads. If you dtrip the thread in the pedal arm, you have a big problem to get it off.

 

When you use the tool, you must fully unscrew the middle bit before screwing the large thread into the pedal arm.

 

 

Whats dtrip mean or is that a spelling mistake, btw I always unscrew the middle bit fully but thread on outer bits are all damaged on all 3 maybe just best to buy a new 1 but thats 4 i have then lol

 

I don't need to use the tool for a while anyway as fitted new pedal arm now which is rock solid

Are you sure you are screwing the tool outer in as far as it will go before winding in the inner? Those threads should be enough for the job if you do.

Whats dtrip mean or is that a spelling mistake, btw I always unscrew the middle bit fully but thread on outer bits are all damaged on all 3 maybe just best to buy a new 1 but thats 4 i have then lol

 

I don't need to use the tool for a while anyway as fitted new pedal arm now which is rock solid

Dtrip means strip, but it might be even worse.

 

I've always used the cheapest tools, and I've used them many times on every type of pedal arm. They still work perfectly and have no damage to the threads. You must be doing something wrong.

 

They should screw in at least half way with just your fingers. If you've had to screw one in with a spanner, you probably had it cross-threaded, which is very easy to do because it's such a fine thread.

I've always used the cheapest tools, and I've used them many times .......................They still work perfectly and have no damage to the threads. You must be doing something wrong.

 

+1 for that

If you have a small triangle file (needle file) you can if you're patient clean the damaged thread up as far as it goes.

 

There's actually a tool called a 'thread file' for the job but they're uncommon (and useful)

It is very easy to strip the outer thread on these - done it myself.

When inserting the outer I find the best way is to offer it up then slowly rotate it anti clockwise until you feel it click. Then start to turn it clockwise. This seems to locate the thread square to allow it to thread properly.

Are you sure you are screwing the tool outer in as far as it will go before winding in the inner? Those threads should be enough for the job if you do.

 

First I like to mention, That I was referring to the old crankshaft arm which was a problem removing. i got it off eventually but not using the puller as thread was damaged I have now fitted a new arm. and yes I always unscrew inner part fully . but was just asking if I ever need to remove this new one anytime, but its solid on the spindle so hopefully not.

Dtrip means strip, but it might be even worse.

 

I've always used the cheapest tools, and I've used them many times on every type of pedal arm. They still work perfectly and have no damage to the threads. You must be doing something wrong.

 

They should screw in at least half way with just your fingers. If you've had to screw one in with a spanner, you probably had it cross-threaded, which is very easy to do because it's such a fine thread.

 

 

Well I think its because old crank arm inner thread was damaged. as tried very careful to screw in the tool. but like i said above I got old arm off eventually. but not using the tool.

I think we all agree OP must have been doing something wrong.

The thing now is to find out what to help him not do it again.

The only two issues I can think of have both been covered above.

I'm summarizing to help OP, and also in case there is anything I have missed.

 

0) grease the the thread of the tool (p.s. from later post)

Also grease the the thread of the tool

 

1) Make sure the tool is not cross-threaded

1a) Don't let it happen

When inserting the outer I find the best way is to offer it up then slowly rotate it anti clockwise until you feel it click. Then start to turn it clockwise. This seems to locate the thread square to allow it to thread properly.

1b) and make sure it hasn't happened

They should screw in at least half way with just your fingers. If you've had to screw one in with a spanner, you probably had it cross-threaded, which is very easy to do because it's such a fine thread.

 

2) Make sure it is fully wound into the crank before starting to pull.

2a) Don't let the puller prevent fully engaging the tool.

When you use the tool, you must fully unscrew the middle bit before screwing the large thread into the pedal arm.

2b) When you have screwed the tool in halfway with fingers as above, you will need a spanner to screw it in all the way.

2c) Just firm. No need for it to be tight; overtightening at this point could even harm the threads.

 

3) When you have finished and removed the tool from the crank, unwind the centre puller.

This means if you are in a hurry when you next use the tool you have already done 1a so can't forget that.

Edited December 6, 2025Dec 6 by sjpt

If you have a small triangle file (needle file) you can if you're patient clean the damaged thread up as far as it goes.

 

There's actually a tool called a 'thread file' for the job but they're uncommon (and useful)

 

Are you referring to this tool

 

https://ebay.us/m/bNQuNf

Agree with most of the above.....

Also grease the the thread of the tool

Are you referring to this tool

 

https://ebay.us/m/bNQuNf

Aye, that one, a very useful tool and I'm surprised to see the price, mine's by Eclipse I think and was made redundant on the same day I was...

Aye, that one, a very useful tool and I'm surprised to see the price, mine's by Eclipse I think and was made redundant on the same day I was...

 

so it will fix the thread on the crankshaft puller tool as that's a lot larger than what they showing plus it says

0.75-3mm whats size is puller thread

so it will fix the thread on the crankshaft puller tool as that's a lot larger than what they showing plus it says

0.75-3mm whats size is puller thread

The size doesn't matter. It's only the pitch that counts for the file, and that's 1mm.

The size doesn't matter. It's only the pitch that counts for the file, and that's 1mm.

 

So this thread tool will be able to clean or make new thread on the puller

So this thread tool will be able to clean or make new thread on the puller

I wouldn't waste my time on it. You can buy two new tools for the price of that file, and that file can only deal with superficial damage, like when you drop the tool and get a ding in the thread. It's not going to sort out a stripped thread.

I wouldn't waste my time on it. You can buy two new tools for the price of that file, and that file can only deal with superficial damage, like when you drop the tool and get a ding in the thread. It's not going to sort out a stripped thread.

 

 

Yeah I think its best to just buy a new puller as only about £4

Don't throw away the damaged ones, if you unscrew the shiny part, you can shove the thicker end of the black part vertically into a hole in piece of horizontal palletwood, to use the thinner part as a butt to bash out seized bottom brackets against. Which is what I had to do, because I don't have an anvil.

Edited December 6, 2025Dec 6 by guerney

Don't tell anyone or make public.

I've buggered up one crank removal tool by not using properly.

I never removed the holding nut and thought it was just stiff.

Gave myself a big problem stripping out thread plus feeling a bit of a plonker.

Don't throw away the damaged ones, if you unscrew the shiny part, you can shove the thicker end of the black part vertically into a hole in piece of horizontal palletwood, to use the thinner part as a butt to bash out stubborn bottom brackets against. Which is what I had to do, because I don't have an anvil.

 

No I never throw things away what can be used on something

This is a good tool to repair the damaged threads in crank arms.

 

https://www.google.com/search?q=unior+damaged+crank+arm+tool&client=ms-android-oppo-rev1&sca_esv=90f8f1f0ee274c48&ei=QXg0acixDoLFi-gPj6m72Ao&oq=unior+damaged+crank+arm+tool&gs_lp=EhNtb2JpbGUtZ3dzLXdpei1zZXJwIhx1bmlvciBkYW1hZ2VkIGNyYW5rIGFybSB0b29sMggQIRigARjDBDIIEAAYgAQYogQyCBAAGIAEGKIEMggQABiABBiiBEjVF1DzEVjNFHABeAGQAQCYAcYBoAHgAqoBAzAuMrgBA8gBAPgBAZgCA6ACuAPCAgoQABiwAxjWBBhHwgIFEAAY7wWYAwDiAwUSATEgQIgGAZAGCJIHBTEuMS4xoAfdB7IHBTAuMS4xuAeLA8IHBTMtMS4yyAdSgAgA&sclient=mobile-gws-wiz-serp

 

Buy a Shimano workshop crank puller, it is a very good tool.

 

https://www.google.com/search?q=shimano+wirkshop+crank+puller&oq=shimano+wirkshop+crank+puller&aqs=chrome..69i57j33i10i160l2j33i671.10248j0j9&client=ms-android-oppo-rev1&sourceid=chrome-mobile&ie=UTF-8

Edited December 7, 2025Dec 7 by Raboa