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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Tensioner /cgi-bin/YaBB.pl?num=1443368377 Message started by justin_o_guy2 on 09/27/15 at 08:39:37 |
Title: Tensioner Post by justin_o_guy2 on 09/27/15 at 08:39:37 I've spent some minutes pondering this. I'm thinking fewer ratchet teeth would help. |
Title: Re: Tensioner Post by DesertRat on 09/27/15 at 10:24:59 can you expand on your thoughts? seems we are missing some data in your statement ;) you could go with the skateboard wheel, spring tensioner, if we are talking "drive chain tensioner". or are we discussing timing chain? or drive belt? or ???? :D |
Title: Re: Tensioner Post by justin_o_guy2 on 09/27/15 at 10:50:34 SOrry, DR, I was talking to people who have held and inspected and pondered the tensioner. I should've included stuff for the new guys. Mmmkay, tensioner is a spring loaded tube in a tube, but, once the inner tube is allowed to move just a minute distance, a ratchet like affair holds it, it can't compress. We, not engineers or metallurgy gurus, have tried to make sense of Howcum Billy got twenty thousand on his cam chain and I got twelve? So far, IIRC, best guess is, the warm up and cool down cycles. Example. You ride just far enough to get it to full operating temp, shut it off. Over and over, never riding longer ,or less. Billy gets on and goes, gets hundreds of miles on it before letting it cool off enough to allow the cylinder to shrink back to normal. Now, just what is the difference between center to center distance between cam and crank, hot and cold? I am working from ignorance and I know that. What I'm suggesting might be laughable. But, I think the tensioner grabs a notch too often and chain life could be increased by machining the teeth differently. A lighter spring would be a step toward Not grabbing that next tooth. The chain doesn't stretch, exactly. It's the sum of wear at the pins. Now, can a lighter spring and different spacing be safe together? What kinda forces are created by the chain? The blasted Unknown unknowns And their potential consequences. I suggest anyone replacing the chain unpack it and drop it in a jar and submerge it in oil. Know it's lubricated on its first rotation under load. |
Title: Re: Tensioner Post by DesertRat on 09/27/15 at 11:33:55 logic confounded by wisdom or was it the other way around ??? thermal expansion and negative thermal expansion (contraction) I understand somewhat, being a welder and all. I heat up a pipe and it expands a certain amount, and when cooling it contracts, but some materials contract more than thermal expansion. Then we mix materials with differing thermal expansion and negative expansion rates and we wind up with even more issues. Stupid atoms, chemistry and science. Quote:
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Title: Re: Tensioner Post by justin_o_guy2 on 09/27/15 at 13:59:46 okay, we have aluminum , and what? Sleeved? And, in your lingo, restrained, but, by bolts that are also being heated..and, the chain is expanding ,but less, so, is the idea too stupid on its face or worth considering? |
Title: Re: Tensioner Post by DesertRat on 09/27/15 at 14:04:03 716E686F72754474447C6E62291B0 wrote:
it's worth considering, provided we have similar metals used for fabrication of the component. the minute we use a base metal that was forged from a different lot we are going to run into issues. |
Title: Re: Tensioner Post by norm92de on 09/27/15 at 14:05:12 Justin, You may be on to something. Certainly the distance between centres will change with heating and cooling. Now if we knew whether or not Suzuki took the exact amount into consideration when they designed the bike? And therefore the size of the notches. I think probably not, because when the chain stretches they would tell you to "just" put a new one on. It would be a lot of unnecessary tension on the chain if it just happened to pick up a notch at the wrong time. :-/ |
Title: Re: Tensioner Post by justin_o_guy2 on 09/27/15 at 14:38:42 My scary, dangerous, thinking, if you can call it that, would be machine away every other tooth but, that's not considering what the spring loaded part that engages the teeth on the tube looks like. Probably engages more than one, putting a Real damper on my pure genius. Verslagen could probably draw one in his sleep.. |
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