Stuck Crank

[Gravity Aided]

Angle grinder. Be safe.

 

[Yellow Saddle]

Angle grinder. Be safe.

I'm sure your suggestion is in jest but I'll pee on your battery nevertheless. Angle grinders don't like cutting into aluminium. It makes an awful mess and sometimes even seizes in the slot. You don't want to spawn a thread on how to remove an angle grinder from a crank now, do you?

Edit: Oops! I just saw your location. Aluminum. The 13th element...

 

[Illaveago]

Can you get hold of a bearing puller to try. Or if the worst comes to the worst you could try removing the other crank and remove the bottom bracket complete and take the whole assembly
To a garage or engineering firm that has a hydraulic press to press the shaft out.

 

[Nibor]

the coeffient of expansion of Aluminium is greater than that of steel so heat should work.

 

[Tim Hall]

I'm sure your suggestion is in jest but I'll pee on your battery nevertheless. Angle grinders don't like cutting into aluminium. It makes an awful mess and sometimes even seizes in the slot. You don't want to spawn a thread on how to remove an angle grinder from a crank now, do you?

Edit: Oops! I just saw your location. Aluminum. The 13th element...

I've used a disc cutter (angle grinder) to get a chainset off in the past. It was knackered and I'd stripped the thread so a crank extractor wouldn't work and I was going to bin it once it was off. You can get discs designed for cutting aluminium. Wear googles and gloves.

 

[screenman]

If it is scrap I would drill it off in minutes.

 

[Smokin Joe]

If it is scrap I would drill it off in minutes.

The chainset came with the trike in November so it is far from scrap and I don't want to destroy it. I'm only replacing it because a new one was cheaper than replacing the three rings to give me lower gears.

I haven't had time to do anything since yesterday but I'll try the hefty whack method on Wednesday. if that fails then I'll invest in a bearing puller.

 

[Yellow Saddle]

The chainset came with the trike in November so it is far from scrap and I don't want to destroy it. I'm only replacing it because a new one was cheaper than replacing the three rings to give me lower gears.

I haven't had time to do anything since yesterday but I'll try the hefty whack method on Wednesday. if that fails then I'll invest in a bearing puller.

A bearing puller is problematic, since you will have to use one with at least three claws and to get a three-claw puller to sit perfectly on the spider is a problem. I am pretty sure you don't have a six-legged spider on that crank. It's a question of geometry.

 

[raleighnut]

The chainset came with the trike in November so it is far from scrap and I don't want to destroy it. I'm only replacing it because a new one was cheaper than replacing the three rings to give me lower gears.

I haven't had time to do anything since yesterday but I'll try the hefty whack method on Wednesday. if that fails then I'll invest in a bearing puller.

I'd get the hot air gun on it, leave it to go cold then try the puller again. It has been known for cranks to be assembled with Loctite 242 (or similar) on the taper, heating destroys the bond (a paintstripping 'gun' is ideal for heating it with as it won't get too hot and they supply a lot of heat over quite a wide area)

 

[Illaveago]

The chainset came with the trike in November so it is far from scrap and I don't want to destroy it. I'm only replacing it because a new one was cheaper than replacing the three rings to give me lower gears.

I haven't had time to do anything since yesterday but I'll try the hefty whack method on Wednesday. if that fails then I'll invest in a bearing puller.

Could you post a picture of the offending article? It is causing a bit of head scratching!
You may be lucky with the shock treatment.

 

[MickeyBlueEyes]

Shock loading is your friend. Just ensure you have enough/the correct positive location and restraint.

 

[mrandmrspoves]

I am surprised that the crankset won't budge because it is brand new. Mine caused absolutely no issues when I swapped it out........just a thought - are you sure that your crank puller tool is small enough at the end to push against the axle, rather than bottoming out within the crank arm? Some crank pullers have an end plug that can be removed to make the end smaller so it fits certain type cranks.

 

[Ajax Bay]

I am surprised that the crankset won't budge because it is brand new.

Not so I fear. New to him, maybe. OP said:

The chainset came with the trike in November so it is far from scrap

 

[mrandmrspoves]

Not so I fear. New to him, maybe. OP said:

No - it's a brand new Performer - and the weather had been too crap to put many miles on it since it arrived. Another possible way of removing the crank is to unscrew the fixing bolt and replace it with a longer one, screw it all the way into the axle so the head protrudes outside the crank arm. Now place the protruding bolt onto a flat hard surface and support the bike (or in this case the trike boom) Then using a flat punch or similar placed as close to the axle as possible hit the inner part of the crank with a large hammer. A few good blows should budge it.

 

[Smurfy]

I'm sure your suggestion is in jest but I'll pee on your battery nevertheless. Angle grinders don't like cutting into aluminium. It makes an awful mess and sometimes even seizes in the slot. You don't want to spawn a thread on how to remove an angle grinder from a crank now, do you?

Edit: Oops! I just saw your location. Aluminum. The 13th element...

I cut a large piece of 6mm thick aluminium chequer plate with an angle grinder. You just have to know how to do it, and it works fine.

And angle grinders can do more than just section materials. As the name suggests, you can grind material with them too.