Talk:Belt (mechanical)

message: The article originally redirected to Conveyor belt, however belts are widely used in mechanical devices and can take many forms. I've added some content and setup Flat belt, Round belt and Vee belt as redirects to here, ultimately those pages deserve content of there own. originated in china. not only known as driving belt but also belt drive and bicyle chain-drive. - Graibeard 00:29, 27 August 2005 (UTC)
thread_title: Untitled

message: I would like to see an article on pitch diameter calculation and on the standard types of synchronous belting along with the pitch line for each type.
--Noelstalker (talk) 19:27, 4 August 2009 (UTC)
thread_title:  pitch diameter calculation 

message: I may be doing a little bit of Devil Advocate play here, but it is not strictly for the sake of play.  I came here from some other articles (Chain Pump and Chain Drive), trying to decide if a Chain Pump should be considered an example of a Chain Drive or not.  Then I found the discussion on the Chain Drive talk page about actuators, which might imply that if a Chain Pump is an actuator, then it might not be an example of a Chain Drive.
If a Chain Pump is an example of a Chain Drive, and per the Chain Pump article, the earliest examples date from 700 BC, then the Chain Drive article should refer to Chain Pumps as the earliest example (instead of the repeating crossbow from the 3rd Century BC).
On the other hand, if a Chain Pump is an actuator, and an actuator is not a drive, then citing the repeating crossbow as the earliest example would seem to be appropriate.  (There might be other arguments to make the repeating crossbow the appropriate earliest example of a chain drive--pursuing the actuator definition is just one that came to mind.)
But, then, continue with the following...
Andy Dingley (talk) 00:34, 11 August 2010 (UTC)
replies: text: Chain pumps aren't chain drives because they don't drive anything. Their only output is their pumping, not the rotation of the driven sprocket wheel. If this wheel had an output shaft that drove some further mechanism, then perhaps they would be. Andy Dingley (talk) 20:07, 26 April 2012 (UTC)
thread_title:  New Thread on Actuators 

message: The current definition in this article -- "A belt is a loop of flexible material used to link two or more rotating shafts mechanically" -- seems to exclude one particular arrangement of a flexible toothed stuff that I've seen on several CNC machines.
( via 4x4'6" CNC plasma table build, Xalky...;
 via "CNC router drive system";
 via "Embroidery machine with XY belt and pinion drive.";
 and  via "What is Grbl being used for?";
 via OX DIY CNC;
etc.)
One person calls this arrangement a "belt and pinion drive"("OpenBuilds Belt and Pinion Build Example").
In those CNC machines,
* Most of the flexible toothed stuff lays on top of a rail, one end rigidly attached to one end of the rail, and the other end rigidly attached to the other end of the rail. (So this toothed stuff is not a "loop" as in the definition).
* There is only one rotating shaft "mechanically linked" to the flexible toothed stuff, a sprocket (pinion?) on the moving gantry. (The shafts on the idler wheels don't even rotate, much less are "mechanically linked"). (So this toothed stuff doesn't match another part of the definition).
(The above drive system is kind of like the "Everman belt drive system", as used in  via "CNC HVLP spray booth", but without the lower toothed rack).
So do we need to tweak the definition in this article to include such non-loop things, or is there some name other than "belt" I should be using for such non-looped flexible toothed stuff?
--DavidCary (talk) 06:44, 2 January 2016 (UTC)
replies: text: That certainly warrants coverage, but I think there should only be a brief description here and the main coverage should be at toothed belt. Andy Dingley (talk) 11:27, 2 January 2016 (UTC)
thread_title:  belts used for linear motion 

message: I wonder if a small section on CVT belts would be appropriate, in particular the segmented metal push-belts that are used in modern automobile transmissions. Obviously not all CVTs use belts, but those that do are common and mechanically distinctive. In some senses, such belts resemble chains (and of course some CVTs do employ chains); however, they have flexible loops (rings or bands) of metal that provide the basic structure, and the segments are not connected to each other, but to the ring packs.
This WeberAuto video has a good explanation of the structure and function:
https://www.youtube.com/watch?v=PiwRUfFEc5k&vl=en
Screwtop (talk) 21:23, 3 March 2019 (UTC)
replies: text: Agreed. --Roly (talk) 21:47, 3 March 2019 (UTC)
thread_title:  CVT (Continuously Variable Transmission) belts 

message: The section on belt crossing is misleading. It says this is done to “even out wear on both sides”. This is at worst untrue and at best misleading. The primary reason (and only reason, to ask anyone who runs flat belt machinery) is to change the direction of the driven shaft. This should be changed, in my opinion. 76.167.94.243 (talk) 12:03, 22 November 2021 (UTC)
thread_title:  Belt crossing