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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Circlip pliers ...
Colleague asked me today what the right sort of circlip pliers for removing the type of clip that needs expanding, but has just a pair of sort of 'opposite-facing "C"s' on the ends of the arms, rather than the more usual holes in the arms. He needs to remove a number of them that are securing fan blades onto a small motor shaft. The clip fits in a groove in the motor shaft. He has tried expanding pin-nosed circlip pliers that are the right size for the job, but because the pins are not locating in holes, they just keep slipping out. I'm sure that I've seen them with a small groove in the outer faces of the pins, but I can't for the life of me find any that look like that now. About the only other thing that I could suggest to him was that he take a pair of 'tradional' pin-tip ones, and Dremel a slot in each pin with a diamond cutting wheel like I keep in mine most of the time for jobs like this. Anyone know if there is a specific tool readily available for this type of clip or if the clip or tool has a unique name rather than it just being a variant of an 'external circlip' ? Arfa |
#2
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Circlip pliers ...
Here's what I use:
http://www.sears.com/craftsman-combi...b lockType=G6 Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Some are for both internal and external style snap rings while others are for internal only or external only. |
#3
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Circlip pliers ...
On Fri, 21 Jul 2017 15:21:22 +0100, Arfa Daily
wrote: removing the type of clip that needs expanding, but has just a pair of sort of 'opposite-facing "C"s' on the ends of the arms, I have been searching for that a wile as well. It seems they are called flat nose snap ring pliers or flat nose retaining ring pliers. I have not found any cheap ones, though. About the only other thing that I could suggest to him was that he take a pair of 'tradional' pin-tip ones, and Dremel a slot in each pin with a diamond cutting wheel like I keep in mine most of the time for jobs like this. That's what I did. I used an angle grinder to remove some material from the inside of the jaws, so that they close a little tighter. On the outside, I simply used a bench grinder. I have left the surface plain flat for now. I have used it only once, but it worked fine. -- RoRo |
#4
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Circlip pliers ...
On 21/07/2017 15:55, Ken Layton wrote:
Here's what I use: http://www.sears.com/craftsman-combi...b lockType=G6 Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Some are for both internal and external style snap rings while others are for internal only or external only. Have you actually used yours on the type of clip that I was trying to describe - i.e. without actual holes in the arms ? My colleague was trying to use some that look pretty similar to those that you linked to, but they just slipped, even though they were an appropriate size Arfa |
#5
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Circlip pliers ...
On 21/07/2017 15:21, Arfa Daily wrote:
Colleague asked me today what the right sort of circlip pliers for removing the type of clip that needs expanding, but has just a pair of sort of 'opposite-facing "C"s' on the ends of the arms, rather than the more usual holes in the arms. He needs to remove a number of them that are securing fan blades onto a small motor shaft. The clip fits in a groove in the motor shaft. He has tried expanding pin-nosed circlip pliers that are the right size for the job, but because the pins are not locating in holes, they just keep slipping out. I'm sure that I've seen them with a small groove in the outer faces of the pins, but I can't for the life of me find any that look like that now. About the only other thing that I could suggest to him was that he take a pair of 'tradional' pin-tip ones, and Dremel a slot in each pin with a diamond cutting wheel like I keep in mine most of the time for jobs like this. Anyone know if there is a specific tool readily available for this type of clip or if the clip or tool has a unique name rather than it just being a variant of an 'external circlip' ? Arfa Usually the C ends are quite close together. I just grab a range of jewellers flat blade screwdrivers and find one that inserts at an angle and when twisted , opens out the arms, the circlip laying nicely on the blade.. |
#6
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Circlip pliers ...
On 21/07/2017 18:51, N_Cook wrote:
On 21/07/2017 15:21, Arfa Daily wrote: Colleague asked me today what the right sort of circlip pliers for removing the type of clip that needs expanding, but has just a pair of sort of 'opposite-facing "C"s' on the ends of the arms, rather than the more usual holes in the arms. He needs to remove a number of them that are securing fan blades onto a small motor shaft. The clip fits in a groove in the motor shaft. He has tried expanding pin-nosed circlip pliers that are the right size for the job, but because the pins are not locating in holes, they just keep slipping out. I'm sure that I've seen them with a small groove in the outer faces of the pins, but I can't for the life of me find any that look like that now. About the only other thing that I could suggest to him was that he take a pair of 'tradional' pin-tip ones, and Dremel a slot in each pin with a diamond cutting wheel like I keep in mine most of the time for jobs like this. Anyone know if there is a specific tool readily available for this type of clip or if the clip or tool has a unique name rather than it just being a variant of an 'external circlip' ? Arfa Usually the C ends are quite close together. I just grab a range of jewellers flat blade screwdrivers and find one that inserts at an angle and when twisted , opens out the arms, the circlip laying nicely on the blade.. Ah ha. Nice idea, Nigel. Long time no speak. trust you are well ? Arfa |
#7
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Circlip pliers ...
On 2017/07/21 10:49 AM, Arfa Daily wrote:
On 21/07/2017 15:55, Ken Layton wrote: Here's what I use: http://www.sears.com/craftsman-combi...b lockType=G6 Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Some are for both internal and external style snap rings while others are for internal only or external only. Have you actually used yours on the type of clip that I was trying to describe - i.e. without actual holes in the arms ? My colleague was trying to use some that look pretty similar to those that you linked to, but they just slipped, even though they were an appropriate size Arfa In a pinch you could take a pair of needle nosed pliers and use those to expand the ends enough to slip off. You can sacrifice the pliers to this specific job if you grind the ends and cut a notch in them to fit the thickness of the circlip. I use tools similar to these Clarke tools in our shop: https://www.machinemart.co.uk/c/circlip-pliers/ Just spotted the following page which has a lot of info on various circlips! https://www.wonkeedonkeetools.co.uk/...-is-a-circlip/ John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
#9
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Circlip pliers ...
On 22/07/2017 15:54, John Robertson wrote:
On 2017/07/21 10:49 AM, Arfa Daily wrote: On 21/07/2017 15:55, Ken Layton wrote: Here's what I use: http://www.sears.com/craftsman-combi...b lockType=G6 Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Some are for both internal and external style snap rings while others are for internal only or external only. Have you actually used yours on the type of clip that I was trying to describe - i.e. without actual holes in the arms ? My colleague was trying to use some that look pretty similar to those that you linked to, but they just slipped, even though they were an appropriate size Arfa In a pinch you could take a pair of needle nosed pliers and use those to expand the ends enough to slip off. You can sacrifice the pliers to this specific job if you grind the ends and cut a notch in them to fit the thickness of the circlip. I use tools similar to these Clarke tools in our shop: https://www.machinemart.co.uk/c/circlip-pliers/ Just spotted the following page which has a lot of info on various circlips! https://www.wonkeedonkeetools.co.uk/...-is-a-circlip/ John :-#)# Interesting. The design in question is the one they call grip rings,and is the fourth picture up from the bottom. They say that these do not normally fit in a groove, but the ones on my colleague's fan motors do. I spoke to him again today. He has actually ordered a bunch of new clips of the right size, so is now not too bothered about the originals breaking or flying, but has ordered some new pliers that he thinks will do them anyway. Just in case anyone thinks that pulling a small fan apart is not worth the aggro, it turns out that these are fans used on the bed of a printing machine, and are carefully speed controlled by external circuitry driven from a tacho generator in the fan. The purpose is apparently to 'float' the paper as it passes through the machine. They are a custom designed fan from one of the major fan manufacturers, and are over £100 each. There are four to a unit, and many units per machine. So far, all of the ones that he has pulled apart and repaired have had bad joints on the Hall IC in the tacho generator, and have worked perfectly after resoldering, cleaning out, and reassembling. The fans have high quality roller bearings, none of which have shown any signs of wear so far. Arfa |
#10
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Circlip pliers ...
On 22/07/2017 16:15, Ralph Mowery wrote:
In article , says... Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Have you actually used yours on the type of clip that I was trying to describe - i.e. without actual holes in the arms ? My colleague was trying to use some that look pretty similar to those that you linked to, but they just slipped, even though they were an appropriate size Instead of Circlip try looking at the e-ring tools. Maybe that is what you are really trying to remove. They look similar and seem to do about the same function, but there are no holes near the ends. http://www.ebay.com/bhp/e-clip-tool No. Definitely not E-rings. These are a type of 'conventional' circlip, but with a slot in each arm to locate the removal tool pins, rather than holes. Thanks for your input anyway. As ever, all comments / suggestions appreciated. Arfa |
#11
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Circlip pliers ...
On 27/07/2017 01:26, Arfa Daily wrote:
On 22/07/2017 15:54, John Robertson wrote: On 2017/07/21 10:49 AM, Arfa Daily wrote: On 21/07/2017 15:55, Ken Layton wrote: Here's what I use: http://www.sears.com/craftsman-combi...b lockType=G6 Sears has several more styles of snap ring pliers: http://www.sears.com/search=snap%20ring%20pliers Some are for both internal and external style snap rings while others are for internal only or external only. Have you actually used yours on the type of clip that I was trying to describe - i.e. without actual holes in the arms ? My colleague was trying to use some that look pretty similar to those that you linked to, but they just slipped, even though they were an appropriate size Arfa In a pinch you could take a pair of needle nosed pliers and use those to expand the ends enough to slip off. You can sacrifice the pliers to this specific job if you grind the ends and cut a notch in them to fit the thickness of the circlip. I use tools similar to these Clarke tools in our shop: https://www.machinemart.co.uk/c/circlip-pliers/ Just spotted the following page which has a lot of info on various circlips! https://www.wonkeedonkeetools.co.uk/...-is-a-circlip/ John :-#)# Interesting. The design in question is the one they call grip rings,and is the fourth picture up from the bottom. They say that these do not normally fit in a groove, but the ones on my colleague's fan motors do. I spoke to him again today. He has actually ordered a bunch of new clips of the right size, so is now not too bothered about the originals breaking or flying, but has ordered some new pliers that he thinks will do them anyway. Just in case anyone thinks that pulling a small fan apart is not worth the aggro, it turns out that these are fans used on the bed of a printing machine, and are carefully speed controlled by external circuitry driven from a tacho generator in the fan. The purpose is apparently to 'float' the paper as it passes through the machine. They are a custom designed fan from one of the major fan manufacturers, and are over £100 each. There are four to a unit, and many units per machine. So far, all of the ones that he has pulled apart and repaired have had bad joints on the Hall IC in the tacho generator, and have worked perfectly after resoldering, cleaning out, and reassembling. The fans have high quality roller bearings, none of which have shown any signs of wear so far. Arfa Exactly those "grip rings" for jewellers screwdrivers. Find one that just fails to seat in the gap and twist, so it sits neatly between the small Cs, and lift off/replace with ring still on the blade. May need a bit of shim, to lever over the point of a C. To avoid flying rings, a piece of cotton tied to one of the Cs and anchored somewhere at the other end |
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