Chaz
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 posted on 3/7/12 at 09:37 PM |
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How to remove something which is press fit! NOW WITH PICS
Yes, frustration to a noob looking to remove a drive coupling which has been press fit onto a shaft. Can anyone help? I have looked up some stuff.
Some say force, heat and cooling. But I don't know which is safer as I don't want to break the coupling with too much force! 
Thanks in advance
Ok see the pics below. I basically want to keep the drive coupling and dont need the shaft. Any ideas?
Charlie
[Edited on 5-7-12 by Chaz]
[Edited on 5-7-12 by Chaz]
[Edited on 5-7-12 by Chaz]
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mookaloid
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| posted on 3/7/12 at 09:42 PM |
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any chance of a picture? Hard to say from that sparse description 
"That thing you're thinking - it wont be that."
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madteg
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| posted on 3/7/12 at 10:01 PM |
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Yes need pictures, you could Grind through sleeve till it splits or heat up cherry red and knock off, Press off. As we said need pictures to decide.
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Chaz
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| posted on 3/7/12 at 10:11 PM |
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Ok I'll get some pictures, thanks back soon
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coyoteboy
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| posted on 3/7/12 at 10:16 PM |
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Again, pictures but:
Similar metals and non temp sensitive parts - you need to heat the lot up as hot as you can physically manage, then cool the shaft while holding it in
a vice and try lumping the hot sleeve off.
Dissimilar metals - might just fall off with heat due to different expansion rates.
Caution - quenching steels after heating them a lot can make them brittle and do other damage to heat treating if present. Heating aluminium can trash
it by removing factory heat treatment. Heat method is only for last resorts or really over-engineered steel bits.
Otherwise you're going to need to press/pull it off. It may never have been intended to come off again - some cryo-fitted parts literally
contact weld themselves together they can be that tight.
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stevegough
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| posted on 4/7/12 at 06:52 AM |
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When I have had to replace worn out wheel bearings on my old Audi which were a press fit into the hub, I took the hubs into a local garage who pressed
the old one out and the new one in using a hydraulic press. I think they charged me three quid for the first pair, then a tenner for another two a few
years later.
Luego Locost C20XE.
Build start: October 6th 2008.
IVA passed Jan 28th 2011.
First drive Feb 10th 2011.
First show: Stoneleigh 1st/2nd May 2011.
'Used up' first engine may 3rd 2011!
Back on the road with 2nd engine may 24th
First PASA mad drive 26/7/11
Sold to Mike in Methyr Tydvil 19/03/14
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Slimy38
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| posted on 4/7/12 at 08:11 AM |
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I have found that most parts which are press fit are not expected to come apart and stay intact. For example press fit bearings generally get
destroyed when they're removed.
It might be that you have no choice but to sacrifice the coupling.
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coyoteboy
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| posted on 6/7/12 at 03:51 PM |
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That'll press off and right back on again. You might struggle with the old vice techinque but a local garage will have a 10T press that will do
the trick.
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fullpint
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| posted on 6/7/12 at 03:57 PM |
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You are more than welcome to use my press if you happen to be in the Melksham area... Offer is open to any forum member.
I've over 28 years in dealing with magnesium wheels. Refurbishment and can powder coat most metal parts. Visit my web site if you wish..
www.tpcs-magnesium-refurbs.co.uk
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Chaz
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| posted on 6/7/12 at 04:05 PM |
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Can I do this with a vice at home rather than take it to a garage? If so shall I cool it or heat it, how shall I do it?
Thanks again for all your advice here, very much appreciated!
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loggyboy
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| posted on 6/7/12 at 04:06 PM |
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will a 2 leg puller not work on that? in vice with the occasion tap from a hammer to shock it out?
Mistral Motorsport
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Chaz
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| posted on 6/7/12 at 04:21 PM |
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My two leg puller is quite big for it. Do you suggest I heat or cool it as well?
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fullpint
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| posted on 6/7/12 at 04:36 PM |
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Down side of using a hammer to shock it is could end up breaking it where using a pess will force it off. Just depends upon the material.
I've over 28 years in dealing with magnesium wheels. Refurbishment and can powder coat most metal parts. Visit my web site if you wish..
www.tpcs-magnesium-refurbs.co.uk
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HowardB
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| posted on 6/7/12 at 05:18 PM |
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here is another option, rather than faff with that lot, sketch what you need, and somone on here might be able to make you a new coupling, so removing
all issues and doubts about damage during removal.
Just a wild thought 
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again and goes zoom)
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Chaz
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| posted on 6/7/12 at 08:58 PM |
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Wow, just used a twin arm pulley puller and it came off! Thanks guys
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