- Thread starter 123hotchef
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Kayos
Gone......
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Ive just done the reverse of this, heated some steel bike forks with the remains of an aluminium quill, sprayed crack it spray down the quill and it tapped out with a chisel easily
Tinbasherdan
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Alternatively you could fill it with grease, support the bottom and press a shaft in to hydraulic it
Screwdriver
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I once did an XT500 engine cylinder in the oven. Needed to get the liner out. It literally fell out!
if it does nothing exciting after a few goes you could try bringing it out of the oven and dunking it in a bucket of water to exaggerate the differential cooling / contraction effect , just another thought .
Screwdriver
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The aluminium would cool down first and probably split open.
Best bet is to tip some cold/iced water into the steel spool only...
123hotchef
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already tried the blow torch and atf and accetone for days now it aint moving and none of the bolts holding the casing together moved either all 6 M8s had to be drilled out! I can not get behind this to tap it out without drilling through the casing that is the last option drill and use a punch and weld the hole up after! I will try the oven then fill the drum with ice but the drum is hollow so a card base may help to insulate the ali case
Screwdriver
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When you say hollow, you mean that circular hole at the bottom goes to the aluminium casing?
123hotchef
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the ring gear in the drum locks into the ring gear in the casing
123hotchef
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Like this
Screwdriver
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Still can't tell. If there is a "hole" through that bronze (?) bushing, I would definitely try grease. Fill the void with grease (so long as the hole goes behind the spool and reaches the outer casing), fit a shaft in there and smack it with a hammer. You will need to support the back of the casting (!), grease does not compress but will try to force its way in between the back of the spool and the casing. You may have to keep refilling the hole and the shaft/punch needs to be a good fit in the bushing.
123hotchef
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no hole through the bush no, grease will not find its way behing the drum.
Screwdriver
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123hotchef
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I will try the oven and ice and report back.
123hotchef
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It yeilded to the 2nd attempt in the oven with freeze spray. The 1st time in the oven I chilled with ice. The freeze spray works pretty well. Thanks for the help and suggestions now to clean this mess up.
Screwdriver
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Great news, well played. I would hesitate to suggest dunking aluminium into acid! Same goes for any precision machined part to be honest. Should be a last resort if at all needed. Just a good clean would be my recommendation.
While I have been a champion for both citric and electrolysis for some time now, there is a time and a place for those somewhat drastic measures. My next obsession will be a large ultrasonic tank project.
While I have been a champion for both citric and electrolysis for some time now, there is a time and a place for those somewhat drastic measures. My next obsession will be a large ultrasonic tank project.
The_Yellow_Ardvark
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With steel.
Citric acid. Then a go over with a scotchbrite pad and clean oil.
Do it with it warm.
The alloy.
Jizzer degreaser.
Then a good wash with hot soapy water.
Into the oven at 70d for an hour.
Then an oily rag.
Citric acid. Then a go over with a scotchbrite pad and clean oil.
Do it with it warm.
The alloy.
Jizzer degreaser.
Then a good wash with hot soapy water.
Into the oven at 70d for an hour.
Then an oily rag.
Last edited:
Careful with ultrasonics - you can hammer holes into aluminium quite well with the wrong transducers, running the wrong frequency.
123hotchef
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Watch this space may be tomorrow now the Mrs has me building her sound both.
