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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Rotary hammer problem - tools no longer lock
I was using my fairly elderly low-end Ferm rotary hammer to do some
heavy-duty chiseling and the tool fell out. When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced? Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing. Am I right? Comparable budget models seem to be around for £50 or so. Many thanks. |
#2
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Rotary hammer problem - tools no longer lock
"... it might be almost as *cheap*..." I meant, of course. Apologies.
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#3
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Rotary hammer problem - tools no longer lock
On 22/04/2018 12:22, Bert Coules wrote:
I was using my fairly elderly low-end Ferm rotary hammer to do some heavy-duty chiseling and the tool fell out.Â* When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced?Â* Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing.Â* Am I right?Â* Comparable budget models seem to be around for £50 or so. Many thanks. On my Makita you could just swap the ball bearing. -- Adam |
#4
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Rotary hammer problem - tools no longer lock
ARW wrote:
On my Makita you could just swap the ball bearing. Thanks for the thought. I did wonder about that, but I think there's more amiss: previously, the outer sleeve was held out by some sort of spring mechanism and it took some pressure to push it and (presumably) part of the chuck down so the tool was fully home before I twisted it: now there doesn't seem to be any resistance at all, nor anything which normally holds the sleeve in its outermost position. |
#5
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Rotary hammer problem - tools no longer lock
On 22/04/18 15:43, Bert Coules wrote:
ARW wrote: On my Makita you could just swap the ball bearing. Thanks for the thought.Â* I did wonder about that, but I think there's more amiss: previously, the outer sleeve was held out by some sort of spring mechanism and it took some pressure to push it and (presumably) part of the chuck down so the tool was fully home before I twisted it: now there doesn't seem to be any resistance at all, nor anything which normally holds the sleeve in its outermost position. This of any help? https://www.toolstop.co.uk/how-to-re...echanism-a1322 |
#6
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Rotary hammer problem - tools no longer lock
"Bert Coules" Wrote in message:
I was using my fairly elderly low-end Ferm rotary hammer to do some heavy-duty chiseling and the tool fell out. When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced? Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing. Am I right? Comparable budget models seem to be around for £50 or so. Many thanks. Shurely if it is an alternator there's no need for a separate regulator as such? (If a dynamo then there is) -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#7
Posted to uk.d-i-y
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Rotary hammer problem - tools no longer lock
Jim K Wrote in message:
"Bert Coules" Wrote in message: I was using my fairly elderly low-end Ferm rotary hammer to do some heavy-duty chiseling and the tool fell out. When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced? Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing. Am I right? Comparable budget models seem to be around for £50 or so. Many thanks. Shurely if it is an alternator there's no need for a separate regulator as such? (If a dynamo then there is) -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ Apologies, wrong thread. -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#8
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Rotary hammer problem - tools no longer lock
Jim K wrote:
Apologies, wrong thread. Thank goodness for that. I can normally get my head around most answers to my questions but that one really had me beaten. Bert |
#9
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Rotary hammer problem - tools no longer lock
Richard wrote:
https://www.toolstop.co.uk/how-to-re...echanism-a1322 Thanks for that. I did look around for a source for a replacement chuck but didn't find anything: I think the model I have is just too old (and I see that Screwfix don't market a Ferm range any more). But it's an interesting video. Bert |
#10
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Rotary hammer problem - tools no longer lock
On 22/04/2018 12:22, Bert Coules wrote:
I was using my fairly elderly low-end Ferm rotary hammer to do some heavy-duty chiseling and the tool fell out.Â* When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced?Â* Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing.Â* Am I right?Â* Comparable budget models seem to be around for £50 or so. Many thanks. You normally need to grease these things with moly (or perhaps graphite) grease. Both of these are notorious for having the oil escape, leaving a packed residue of solid lubricant that could well gum up the internal latch mechanism. I would spray liberally with WD40 or soak it in plus gas or any of the other popular remedies (diesel, automatic transmission fluid half and half with acetone, etc etc). And "work" it a few times and then put it back to soak. |
#11
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Rotary hammer problem - tools no longer lock
On 23/04/2018 10:33, newshound wrote:
On 22/04/2018 12:22, Bert Coules wrote: I was using my fairly elderly low-end Ferm rotary hammer to do some heavy-duty chiseling and the tool fell out.Â* When I tried to replace it, I discovered that the rubber sleeve would no longer pull back. Removing the sleeve and the small additional grommet-type thing that sits in front of it didn't leave me any wiser: the shaft of the chuck still moves in and out, but even at its extreme inward position the tool doesn't lock. Looking into the chuck I can see the lengthways raised strips which guide the tool in, but no visible locking mechanism - which I've discovered from an online search should be a ball bearing. Does this mean that the entire chuck has to be replaced?Â* Another quick search hasn't thrown up a source, but even if it had I suspect that it might be almost as expensive, and a great deal easier, simply to replace the whole thing.Â* Am I right?Â* Comparable budget models seem to be around for £50 or so. Many thanks. You normally need to grease these things with moly (or perhaps graphite) grease. Both of these are notorious for having the oil escape, leaving a packed residue of solid lubricant that could well gum up the internal latch mechanism. I would spray liberally with WD40 or soak it in plus gas or any of the other popular remedies (diesel, automatic transmission fluid half and half with acetone, etc etc). And "work" it a few times and then put it back to soak. I could have added, I have a meeting this afternoon with a man who has a similar problem at his nuclear power station. |
#12
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Rotary hammer problem - tools no longer lock
On Mon, 23 Apr 2018 10:34:38 +0100, newshound
wrote: I could have added, I have a meeting this afternoon with a man who has a similar problem at his nuclear power station. He needs to soak a nuclear power plant in WD-40 and "work" it a few times to get it going? This should be mentioned in the FAQ, y'know. Thomas Prufer |
#13
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Rotary hammer problem - tools no longer lock
On Monday, 23 April 2018 12:14:14 UTC+1, Thomas Prufer wrote:
On Mon, 23 Apr 2018 10:34:38 +0100, newshound wrote: I could have added, I have a meeting this afternoon with a man who has a similar problem at his nuclear power station. He needs to soak a nuclear power plant in WD-40 and "work" it a few times to get it going? This should be mentioned in the FAQ, y'know. Thomas Prufer we would but there's a separate newsgroup for it, news:free.uk.diy.nuclear-device NT |
#14
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Rotary hammer problem - tools no longer lock
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#15
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Rotary hammer problem - tools no longer lock
"newshound" wrote:
I would spray liberally with WD40 or soak it in plus gas or any of the other popular remedies... And "work" it a few times and then put it back to soak. I'll try that, thanks. |
#16
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Rotary hammer problem - tools no longer lock
"newshound" wrote:
I could have added, I have a meeting this afternoon with a man who has a similar problem at his nuclear power station. The tools won't stay in? |
#17
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Rotary hammer problem - tools no longer lock
On Mon, 23 Apr 2018 12:54:01 +0100, Andy Burns wrote:
wrote: news:free.uk.diy.nuclear-device I suppose that would get us "free archiving" by someone other than HoH and Google ... I managed to subscribe to that NG and request the latest 300 postings. I got about 150 that went back to 2003, all mostly rather weird spam 800 line postings. The latest one was 2017, not exactly a 'busy' NG for the past 5 years (one or two postings a year). It was rather more busy prior to that, meaning 3 to 12 posts a year! :-) Curiosity satisfied, I unsubscribed, I've got enough moribund groups in my subscribed list with css, nsr, ucol and uch as it is to bother with an even more moribund one thank you very much. :-) -- Johnny B Good |
#18
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Rotary hammer problem - tools no longer lock
Johnny B Good wrote:
Andy Burns wrote: wrote: news:free.uk.diy.nuclear-device I suppose that would get us "free archiving" by someone other than HoH and Google ... I managed to subscribe to that NG and request the latest 300 postings. I assumed it was fictitious, it's not on NIN's list of ~25,000 groups. |
#19
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Rotary hammer problem - tools no longer lock
On Mon, 23 Apr 2018 20:54:35 +0100
Andy Burns wrote: I assumed it was fictitious, it's not on NIN's list of ~25,000 groups. Probably one that was auto-created by a posting to a dodgy server that does that sort of thing ("subscribe to our great service - we carry three trillion groups") and maybe propagated to others that aren't very well run. NIN seems to be well run. |
#20
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Rotary hammer problem - tools no longer lock
On Monday, 23 April 2018 20:50:45 UTC+1, Johnny B Good wrote:
On Mon, 23 Apr 2018 12:54:01 +0100, Andy Burns wrote: tabbypurr wrote: news:free.uk.diy.nuclear-device I suppose that would get us "free archiving" by someone other than HoH and Google ... I managed to subscribe to that NG and request the latest 300 postings. I got about 150 that went back to 2003, all mostly rather weird spam 800 line postings. The latest one was 2017, not exactly a 'busy' NG for the past 5 years (one or two postings a year). It was rather more busy prior to that, meaning 3 to 12 posts a year! :-) Curiosity satisfied, I unsubscribed, I've got enough moribund groups in my subscribed list with css, nsr, ucol and uch as it is to bother with an even more moribund one thank you very much. :-) It used to have some on-topic activity. And some have done it or come close, eg david hahn. NT |
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