One way clutches.

[PeterG]

What are peoples views on slipping one way clutches?
Do you,
Clean the clutch, if you do clean the clutch, what do you lubricate it with?
Just replace the clutch?
Replace the clutch & the shaft it rides on?
How do you deal with the polished shaft?

We sort of do all of the above. The guys I work with seem to favour rubbing back the shaft with light emery paper, but I am of the opinion that this will remove the hardening.

Just after other opinions.
Thanks.

[techno77]

resurface

I personally lightly resurface the shaft where the one way rides and replace the one way bearing. If the outside diameter of the shaft is worn down I replace then shaft as well.

[ewizzy]

Re: resurface

I personally lightly resurface the shaft where the one way rides and replace the one way bearing. If the outside diameter of the shaft is worn down I replace then shaft as well.

Firstly, I measure the diameter of the shaft on a non worn part of the shaft with calipers, if its worn I'll replace the shaft and the one way bearing. if not worn, then I use 800 grit wet and dry paper and take the shine off the shaft, measure again to make sure I haven't worn the shaft down too much. If thats OK, then I will use petrol lighter fluid on a lint free cloth, slip the one way bearing over a corner of the cloth, and then turn the one way bearing on the cloth until it runs clean. repeat if necessary until the solvent on the cloth stops getting crap on it.

Refit and test, hopefully it works perfectly. If not. replace.

[jotunn]

Re: One way clutches.

Do you still believe that there is any kind of hardening on shafts surface?
We've got customers with Bizhub 250 bought at the beginning of production (now over 1M pages printed/copied), and there are still factory installed shafts.
Shafts bought as a replacement part often make problems - they are polished soon, and cannot reach full life count.

[EarthKmTech]

Re: One way clutches.

there is an outer coating on some shafts as I've seen it worn through on some high volume machines, by that state its well and truly time to replace it.

Most of the time I change the 1 way clutches with the rollers as they are half the price of the rollers anyway and cheap insurance. Separation torque limiters are not to be forgotten about either.

[Zackuth]

Re: One way clutches.

We use rubbing alcohol to clean the clutches, just pour it on/in the clutch and spin it until clean. I use a scotch pad if the shaft surface looks too shiny. If the problem comes back "quickly" (quick as reletive to machine and copy count, but I use a week for a standard time frame), I'll replace the clutch. If I feel the shaft has a groove in it, I'll replace it.

[Taminol]

Re: One way clutches.

What are peoples views on slipping one way clutches?
Do you,
Clean the clutch, if you do clean the clutch, what do you lubricate it with?
Just replace the clutch?
Replace the clutch & the shaft it rides on?
How do you deal with the polished shaft?

We sort of do all of the above. The guys I work with seem to favour rubbing back the shaft with light emery paper, but I am of the opinion that this will remove the hardening.

Just after other opinions.
Thanks.

I usually look around the office for a lady with nice fingernails and ask if she has an emery board I can borrow. I'll buff the shaft to remove the shine and spray out the one way clutch with solvent. Next I spray solvent on to a cloth and poke the cloth through the middle of the clutch and spin it on it.
All seems to work fine.

[Ray G.]

Re: One way clutches.

What we've been doing for the last few years is to rid the shaft of the "shine" using a small section of a chore girl scrubbing pad. Then using the corner of a lint free cleaning cloth, clean the inside of the one-way bearing. Seem to work pretty good.

[KM1Amsterdam]

Re: One way clutches.

I just clean the shaft and rinse down the clutch, which i call a bearing of one-way gear. Cannot seem to decide what is best for rinsing, alcohol, contactspray of ptfe lubericant or maybe wd40.

I don;t mind the shiny shaft, just clean/degrease with my cloth and check with my nail, if a rim of edge had formed on the side of the shiny part. Replace the shaft if needed.

I also try to look for the one-way which drives the fuser exit rollers. Always problems when this one gets greasy.

[blackcat4866]

Re: One way clutches.

I just clean the shaft and rinse down the clutch, which i call a bearing of one-way gear. Cannot seem to decide what is best for rinsing, alcohol, contact spray of ptfe lubericant or maybe wd40.

I don;t mind the shiny shaft, just clean/degrease with my cloth and check with my nail, if a rim of edge had formed on the side of the shiny part. Replace the shaft if needed.

I also try to look for the one-way which drives the fuser exit rollers. Always problems when this one gets greasy.

This is about the closest to my personal philosophy.
I'm not finding much consensus here. I'll add to the confusion with my own theories:

I do soak out one-way clutches, one-way bearings, or Torrington's (whatever you want to call them), in alcohol, then swab out the inside with a wooden handled cotton swab (mine are medical grade). I lubricate with a couple drops of 3 in 1 light oil or TriFlow. By the way, WD40 is not a lubricant, and it attacks most plastics!

I disagree with a lot of techs about the shafts. Most techs I know like to rough up the shafts with sandpaper or scotchbrite. In my personal opinion these one-ways work best on a smooth shaft of a very specific size. As long as the shaft size remains the same I do nothing to it, regardless of how shiny it is. If the shaft is worn down in diameter or the plating is peeling off, I'll replace the shaft. Only very infrequently do I see a shaft that's worn enough to replace.

One-way bearings rely on the cylinder bearing movement to grip a specific sized shaft, not friction. Why would you want to reduce the size of the shaft? To make it slip more?

I don't expect to change anyone's mind. I've had this argument too many times to think otherwise. Take it or leave it, you're choice. =^..^=

[PeterG]

Re: One way clutches.

Thanks for all the responses guys.
It is interesting to get other peoples opinions on this sort of stuff. I like to listen to other ideas, rather than continue down the old "that's the way we have always done it route."

[Konicoz]

Re: One way clutches.

and there's always that 1 guy who cant be bothered to remove the clutch or gears to clean or lube squeak and sprays the whole back of the machine with wd40 .......what should I do with him? :/

[methogod]

Re: One way clutches.

spray him with WD40 and light him on fire...

or hire better people...

[blackcat4866]

Re: One way clutches.

and there's always that 1 guy who cant be bothered to remove the clutch or gears to clean or lube squeak and sprays the whole back of the machine with wd40 .......what should I do with him? :/

I sure don't know ... but it just makes me cringe when I hear about it. Some people should choose less challenging occupations. =^..^=

[blackcat4866]

Re: One way clutches.

I've gathered quite a lot of information, but the most organized presentation is by Koyo. Pay special attention to the Canon NP-6060 at the end of the brochure. Here is some interesting reading:

dwg5.jpgOne-Way Bearing.jpgOne-Way Bearing1.jpg

The shaft diameter is crucial. And in the maintenance section I didn't read a single word about sanding the shaft. They do say quite a bit about measuring the diameter though. Size is crucial. =^..^=