Talk:Roller chain

I put a 'citation needed' after the statement that "The great majority of driving chains operate in clean environments..." because I am not entirely convinced this is true. Many chains operate in relatively dirty conditions, e.g. in agricultural machines, saw chains in chainsaws, harvesters and saw mills, motorcycle chains, and of course bicycle chains.

I edited the paragraph saying motorcycle chains had been mostly supplanted by cog belts and other systems, because it is simply not true. Although this is true for american motorcycles, most motorcycles in the world still use chains, because of their better performance (in transmitting the power) and in spite of their higher wear. All racing motorcycles use chains, and so do most of the german and japanese ones and almost all chinese and italian ones. 85.28.65.75 07:32, 27 February 2006 (UTC)[reply]

Gull chain

French man, Middle (or Meddle) Gull got patent, the practical or usable chain called Gull chain in 1832. Can any one add this fact in the article? I have no more info. Thanks. Namazu-tron (talk) 10:45, 26 May 2009 (UTC)[reply]

The only reference I can find to this is here: http://chain-guide.com/breaks/brief-history-of-chain.html Was this a roller chain? --NipponBill (talk) 06:26, 27 May 2009 (UTC)[reply]

Thank you for response. The source site of File:The sketch (drawing) of roller chain, Leonardo da Vinci.jpg, http://www.jca333.jp/jp/index02.html in Japanese, from the context, it is understandable it was roller chain, Japanese say "Chain for 伝導". Literally power/energy transmission chain. Can you or any one check the record of French patent obtained for Bicycle chain?Namazu-tron (talk) 23:00, 28 May 2009 (UTC)[reply]

Units Needed

The Chain strength section and it's calculations are very helpful, but they lack units. This is somewhat made up for by the following Chain Standards section, but the calculations should have units associated with them.Whizbo (talk) 21:17, 14 October 2009 (UTC)[reply]

The table has units associated with it, but they are incorrect. The table should have pounds force and newtons not pounds mass and kg. — Preceding unsigned comment added by Ericnutsch (talk • contribs) 04:45, 10 January 2011 (UTC)[reply]

Need sizes for bicycle / motorcycle chains

The ANSI chain size chart is helpful but doesn't include info on motorcycle and bicycle chain sizes:

Bicycle and Motorcycle Chain Dimensions

Chain No. Pitch Roller Diameter Roller Width Sprocket thickness

Bicycle, with Derailleur 1/2" 5/16" 1/8" 0.110"

Bicycle, without Derailleur 1/2" 5/16" 3/32" 0.084"

420 1/2" 5/16" 1/4" 0.227"

425 1/2" 5/16" 5/16" 0.284"

428 1/2" 0.335" 5/16" 0.284"

520 5/8" 0.400" 1/4" 0.227"

525 5/8" 0.400" 5/16" 0.284"

530 5/8" 0.400" 3/8" 0.343"

630 3/4" 15/32" 3/8" 0.343"

This is from: http://www.gizmology.net/sprockets.htm

I don't know how to format charts in wiki. Can someone who is good at doing charts do this? —Preceding unsigned comment added by Nasukaren (talk • contribs) 20:57, 16 April 2010 (UTC)[reply]