threads on my crank stripped out
its seized on hard
bent the chainrings trying to pry it off
i think im just gonna cut it off with a hacksaw
but what kind of hacksaw will i need?
the chainrings are steel and the crank is aluminium
am i gonna need a special kind of blade
You sure the threads are stripped? If so then just remove the bolt... whatever you did looks fricked. Drill the bolt head or weld something into it.
i dont have a drill or a welder
there are no threads theyre well and truely stripped
and thats also not how cranks go on a bike the threads are only for pulling the crank off its held on by pressure and corrosion
i like this idea but that could bend the bottom bracket
noted
looked into that one but i dont wanna damage the frame or bb
second one
yea i dont wanna do that
1st gear is still ok so i could do it but i dont rly like the idea of riding around for miles waiting for my crank to fall off
where i live is very hilly and doesnt have bikepaths so it could happen at 40mph lol
also i think its seized on too hard for that to work anyway since it didnt budge when i used the puller
Is the shaft tapered, keyed or just pressed? If it's either of the latter there is certainly a special tool for this. Just buy a drill, if you don't have one you can't diy shit.
its a square taper crank, and op ripped out the threads using the crank puller...youre welcome since you cant read
Apply penetrating oil (seafoam deep creep is my fav), give it some time (overnight), and then apply heat. A torch is ok, but don't overheat the aluminum or it'll melt. Hairdryer could be used if you have nothing else. This will help loosen up the threads.
Hair dryers don't get warm enough for any serious work to be done. A heat gun is a lot more effective than a hair dryer.
Pop the opposite crank off, turn it 180 degrees so it matches the stuck crank. Put a jack between the cranks as close to the bottom bracket as possible and push them apart.
Alternatively, take the pedal off the crank, put it in a vice, and try pulling the bike off the crank, not vice versa.
You're gonna have to write off the cranks and the bottom bracket.
A cheap corded angle grinder with some cutting disks would make short work of it and be extremely handy afterwards.
A corded angle grinder with a cutoff wheel made quick work of my stripped bike cranks, in the future heat them with a torch if they don't pop off easy.
I had to use a ball joint wedge for this once
yea these are nasty to deal with
do you mean the bolts holding the chainring to the crank are stripped ... or the threads for the puller are stripped and you bent the ring trying to press it off?
if it's the latter, i have knocked the crack off the spindle with a hammer before...flip the bike upside down and whack away...cutting the spindle would be fricked
stripped using a crank puller?
if you hadnt gorilla'd the chainrings you could have ridden around with the bolt off and wait for the crankarm to loosen up by itself.
if nobody has any better advice im just gonna buy the cheapest hacksaw i can find on ebay
like I said, you should be able to knock it off with a hammer without cutting anything...maybe even heat up the crank with a torch if it was really bad, but if you want to saw it any metal hacksaw should cut the crank...might just take a long fukkin time.
ok thanks
i tried a hammer already didnt do shit
well i ordered a hacksaw
i did my own research and found course and fine blades exist so i ordered one of each of those since i need to cut both steel and alu
wish me luck i guess
will update the thread if its still up when they arrive
Normally fine tooth blades for metal. Hopefully you didn’t get cheap blades because cheap saw blades and drill bits are AIDS. The aluminum shouldn’t be too bad.
Are you replacing the cranks too? Sawing through the spindle will probably be the worst part if you end up doing that. I would’ve bought a bigger hammer and asked my mom’s boyfriend to swing it with some muscle to punch the spindle out of one crank arm before attempting to hack through all that shit.
yeah its cheap blades
idk how much im supposed to spend on bldes though
also im thinking i wont actually need to cut the aluminium just the steel chainrings to get room to fit a puller tool in
and yeah im replacing the cranks that was the plan from the start so im fine with further mutilating this one
also i dont know any big strong men to help me lol
>tfw no big strong bf to help meeee
>Normally fine tooth blades for metal
Bepis is too stupid to know how tooth count works.
Why am I not surprised?
>arguing common sense and decades of sfandards
He is correct and you're a cretin.
Fresh hacksaw blades can move a lot of metal but shitty ones will need more frequent replacement. If OP gets shite blades that will be obvious and easily corrected.
yeah i bought the cheapest hacksaw
im just gonna see how the probably shit blade on it does, if its not working il get a nicer blade
hacksaw has arrived but im out of the house atm so the bike gore will be posted soon
Wtf moron buy an angle grinder at harbor freight for 10-15 bucks
frick off moron aluminium is extremely easy to cut by hand. a chinesium angle grinder is a waste of $15
Lol k notools wienersucker
Torch is cheap, steal one from a pothead like a Black person if you're that poor
Pathetic
hacksaw will take ages
get an angle grinder
cant afford also scary
i cant access it to unscrew it with the crank on unfortunately 🙁
can you not remove the bottom bracket from the other side and just replace the whole thing?
Are pullers not a thing in your shitty country?
You should be able to lend one from any car workshop and be finished in minutes when you bring your bike and use the tool in their driveway.
thats what i used to bend the chainring lol
i couldnt find anywhere to fit the hooks besides the outside of the big ring
Use a bit of oil when sawing it will be slightly easier and less noisy.
wd40?
i also have chainlube
A great philosopher once said: "Hearken back to your doctoral thesis. Plastic cuts skin. Aluminium cuts plastic. Steel cuts aluminium. And c**tstain targlide cuts everything else."
heat the arm. It will expand slightly. While it's hot take a paraffin wax candle and shove it up your ass.
> ngl melt the paraffin into the joint.
Spray with penetrating oil, and get a decent sized punch and smash the frick out of the crack end. I will probably come loose.
Cut the whole arm off including the spindle. The. Pop the bearing cap off and smash the rest through and out.
I’ve done with before. The parts are fricked, no use being gentle on them.
What you should have done was left the bolt out and gone for a little tour on it and see if the pressure of pedaling would have helped you break it free.
Taker a hammer and smash the ever living shit out of the crank arm.
No sense in saving it you already fricked it up.
If that don;t work smash the frick of of the side adjacent to the shaft like beating a tie rod end loose.
you should take this to /n/ OP - it's the bike board.
older cup and cone you could remove the non drive side of the bb and then just punch it out from the drive side - won't work with a cartridge though. maybe open it up and see what you've got.
cartridge i'd go with heat on the crank arm and tap it with a hammer - if you really whack at it you risk fricking the bb. failing that, a couple of cuts through the crank arm with an angle grinder and cutting wheel and it'll just fall off.
wire brush in your crank threads next time maybe, clean the puller and thread it in carefully also...
yay threads still up
update hacksaw arrived
started hacking away
its actually not too hard to cut the steel and alu is very low quality
im very close yet so far to getting the crank off i think but i cant quite find a good angle to cut at so im just hacking chunks off
arm is very achey so im gonna continue tomorrow
heres some gore
and this is the hacksaw i bought
im just using the blade that came on it im sure a better blade would be easier but this one seems to be doing the job
Angle grinder would have taken 15 seconds homosexual
>Are angle grinders that cheap?
Yes.
>Trying to keep tools I'll only use once to a minimum
Angle grinder is even more versatile than a circ saw.
>frick off im busting my ass with hand tools
Like a tard, it isn't 1850
>wtf are you doing? i bet you just screw peices of wood together occasionally
I pulled three layers of flooring and subflooring from my home, redid all the flooring, reinstalled the fixtures, redid the insulation, redoing the ceiling and walls and installing cabinets, painting, residing, repairing the roof and cutting all my own molding/trim from the flooring extras. I've built and fixed literally hundreds and hundreds of bicycles, done all my own auto work forever, handcrafted high end cutlery with ivory handles among a myriad of other materials, I'm a pipefitter for a living, I can sew, cook, operate literally any tool or vehicle you could even think of, and i frick like a god. I know what I'm talking about.
>yeah im sure it wouldve but i dont want to buy a whole ass power tool im only gonna use once and maybe mutilate myself with
Skill issue. Git gud, watch a safety video or three. morons do it without problems every day. You can do it.
Also compared to /n/ YOU are mechanically moronic don't talk shit if you can't even pull a seized crankarm off
No hard feelings bro I believe in you
tldr
Tldr glhf
Release the chain tensioner and remove the rear wheel.
If you can't remove the pedals, you may need to drill it out.