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  • projectnut
    replied
    Sorry error on my part. It seems MOST bicycle chains are a variation of #40. There have however been other pitches introduced from time to time.

    Here's a quote from Wikipedia:
    The chain in use on modern bicycles has a 1⁄2 inch (12.7 mm) pitch, which is the distance from one pin center to another, ANSI standard #40, where the 4 in "#40" indicates the pitch of the chain in eighths of an inch; and ISO standard 606 (metric) #8, where the 8 indicates the pitch in sixteenths of an inch. Its roller diameter is 5⁄16 inch (7.9 mm).

    1976: Shimano briefly made their own 10 pitch Dura-Ace track-specific system with 10 mm (3⁄8 in) (approximately) pitch from about 1976[13] to 1980[14]—called Shimano Dura-Ace 10 pitch. The Shimano 10 pitch system is incompatible with ANSI standard #40 (1/2") e.g. chains, sprockets and so on,[15][16] and was outlawed by the Japan Keirin Association, helping in its demise.[13]
    Width

    Chains come in 3⁄32 in (2.4 mm), 1⁄8 in (3.2 mm), 5⁄32 in (4.0 mm), or 3⁄16 in (4.8 mm) roller widths, the internal width between the inner plates. 1⁄8 in (3.2 mm) chains are typically used on bikes with a single rear sprocket: those with coaster brakes, hub gears, fixed gears such as track bicycles, or BMX bikes. Chains with 3⁄32 in (2.4 mm) wide rollers are generally used on bikes with derailleurs such as racing, touring, and mountain bikes.[17] Fixed sprockets and freewheels are also available in 3⁄32 in (2.4 mm) widths so fixed-gear and single-speed bikes can be set up to use the narrower and lighter 3⁄32 in (2.4 mm) chains. Finally, chains with 5⁄32 in (4.0 mm) wide rollers are used on cargo bikes and tricycles.

    With derailleur equipped bicycles, the external width of the chain (measured at the connecting rivet) also matters, because chains must not be too wide for the cogset or they will rub on the next larger sprocket, or too narrow that they might fall between two sprockets. Chains can also be identified by the number of rear sprockets they can support, anywhere from 3 to 13, and the list below enables measuring a chain of unknown origin to determine its suitability.
    • 6 speed – 7.3 mm (932 in) (Shimano HG), 7.1 mm (932 in) (SRAM, Shimano IG)
    • 7 speed – 7.3 mm (9⁄32 in) (Shimano HG), 7.1 mm (9⁄32 in) (SRAM, Shimano IG)
    • 8 speed – 7.3 mm (9⁄32 in) (Shimano HG), 7.1 mm (9⁄32 in) (SRAM, Shimano IG)
    • 9 speed – 6.5 to 7.0 mm (1⁄4 to 9⁄32 in) (all brands)
    • 10 speed – 6.0 to 7.0 mm (1⁄4 to 9⁄32 in) (Shimano, Campagnolo)
    • 10 speed (Narrow) – 5.88 mm (7⁄32 in) (Campagnolo, KMC)
    • 10 speed (Narrow, Direction) – 5.88 mm (7⁄32 in) (Shimano CN-5700, CN-6700, CN-7900)
    • 11 speed – 5.5 to 5.62 mm (7⁄32 to 7⁄32 in) (Campagnolo, KMC, Shimano CN-9000)
    • 12 speed - 5.3 mm (13⁄64 in) (SRAM)
    • 13 speed - 4.9mm wide - Campagnolo Ekar[18]

    The Wikibook, "Bicycle Maintenance and Repair", has more details on this topic.
    Last edited by projectnut; 06-19-2022, 09:42 AM.

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  • DrMike
    replied
    There are many ways to push a chain. As long as it has a guide, it works pretty well and the artillery videos above show how they can solve some tricky space issues.

    Even better are chains designed specifically to be pushed. I've worked quite a bit with the folks at Serapid, a fairly small, very innovative company. No one has heard of them, but everyone has seen what they can do - open the roofs of stadiums, move the SkyBox in the Willis Tower in Chicago, etc

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  • ikdor
    replied
    Artillery uses it as well

    Leave a comment:


  • J Tiers
    replied
    Originally posted by Georgineer View Post

    Of course you can push a chain - how else do you suppose it gets to the back sprocket? Perhaps I should have referred to the push-bike as a 'treader' as we did when I was a yoof.

    George
    If you look at a video of loading the large guns in US battleships, you will see something that looks remarkably like a large roller chain, which appears to unroll from somewhere. It is used to load (ram) the projectile and the powder bags. So that appears to be a "pushable" chain.........

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  • oxford
    replied
    Originally posted by Fasturn View Post

    Good point ol boy? .
    See my post a little ways up. I knew what happened, happened to me as well. I was just poking a little fun

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  • Fasturn
    replied
    Originally posted by oxford View Post

    Where does the chain go in the micrometer? Lol.
    Good point ol boy? I wrote 35 ...Starrett Precision Bench Micrometer (SUPERMIC) ...Starrett Precision Bench) twice and it put in a super mic ????? Then I said ah hell, just erase it ¿
    Soooo it been edited . That was fun hey. Never a dull moment on this site. Glad you found it....and not JR. Btw see it did it again. Russians are hacking. When I type # it inserts the blue. Huh.
    Last edited by Fasturn; 06-17-2022, 08:37 PM.

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  • oxford
    replied
    Originally posted by Fasturn View Post
    Tim, late to the game, but we used Starrett Precision Bench Micrometer (SUPERMIC) chain for our go -carts and mini bikes back in the 60's. Kinda standard back when. Hope you are well !
    Where does the chain go in the micrometer? Lol.

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  • Fasturn
    replied
    Tim, late to the game, but we used 35 chain for our go -carts and mini bikes back in the 60's. Kinda standard back when. Hope you are well !
    Last edited by Fasturn; 06-17-2022, 08:25 PM.

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  • Doozer
    replied
    Originally posted by Georgineer View Post

    Of course you can push a chain - how else do you suppose it gets to the back sprocket?

    George
    It is pulled there.

    -D

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  • Tobias-B
    replied
    Yeah, the 'hashtag' symbol is doing something whacky.

    "#200"
    works out ok with quotes but

    B & S vs Starrett dial caliper

    without the quotes...

    and it only seems to happen when you put the # in front of something else.

    Looks like it takes you to thread # whatever is after the Bicycle chain

    Yup- it's the thread number.

    t
    skinny floppy #40, is what bicycle chain is.
    Last edited by Tobias-B; 06-17-2022, 12:20 PM.

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  • Georgineer
    replied
    Originally posted by Doozer View Post
    You can't push a chain
    (unless it has no where else to go).

    -D
    Of course you can push a chain - how else do you suppose it gets to the back sprocket? Perhaps I should have referred to the push-bike as a 'treader' as we did when I was a yoof.

    George

    Leave a comment:


  • Georgineer
    replied
    Originally posted by projectnut View Post
    This is the text I originally posted:
    "Bicycle chain is #41 It's the same pitch as #40, but thinner.

    This is what appeared on the screen:

    Bicycle chain is 3 phase It's the same pitch as metals -- sources and rust and slag but thinner
    Sounds perfectly all right to me. Obviously a 3-phase bike chain gives a smoother output than single-phase, the same as with lathe motors. The rust and slag speaks for itself.

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  • darryl
    replied
    Auto correct- the big brother, the stupid one 3 phase rust and slag, ha ha. Finally, I understand chain

    Torque and tension, yes it is simply tension in the chain. Torque is not the right word- unless perhaps in reference to twisting the chain.

    Another way to look at it as a drive chain for a barbeque is that it would not be lubed to begin with, but it would absorb from the atmosphere in the barbeque. That might mean that until heated up, the chain might be stiff. Your options are simple- just change the chain when you need to. If the chain is external to the barbeque, then you'd use something like bike chain lube, the anti-fling stuff, and it will probably last forever. One thing chains don't like is running dry with significant tension on them. That will wear them out fast.

    A friend got a Harley a few weeks ago. First thing I did was look at the chain (as I do with my own m/c.) It looked dry- that kind of spooks me. You don't know the history of it- how many miles it was run like that. I've heard the stories of a chain breaking and whipping your ear off- or your arm. Not that it would be a problem for a barbeque- you'd be more concerned about the roast flying apart and finding yourself eating it before it was ready

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  • J Tiers
    replied
    Originally posted by George Bulliss View Post

    Well, that's weird. No idea what's up with that.
    That's pretty common, actually.

    I've had the site apparently interpret something as intending to create a link. Often that is a simple shift button press for a capital letter. It ends up inserting a link, or in other cases, erasing everything that was written.

    No doubt it arises from some fat-fingered mistyping, but I have seen it a number of times. Very odd and disconcerting. Makes me happy that the site retains what was typed, so such problems can be reversed.

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  • Doozer
    replied
    Bicycle chain is not number 41 chain. I promise you.

    -D

    Leave a comment:

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