Talk:Line shaft

Good image, but could use some labels

 * This comment relates to picture File:Line shaft.jpg, which has since been replaced. -- EdJogg (talk) 13:31, 10 December 2010 (UTC)

The closest pulley/axle near the top is actually a jackshaft, and the line shaft is in the back right corner of the image, not very visible in the thumbnail. An examination of the full-size image shows multiple small jackshafts above the various floor machines, though the image is so "busy" with building timber that they are not very visible.

Perhaps it should be rendered as abstract line-art, using color highlights to show the different mechanical components?

DMahalko (talk) 17:24, 28 April 2008 (UTC)

When is a 'line shaft' a 'jackshaft'?

 * Although technically the shafts not driven directly from the power source are (probably) correctly identified as jackshafts. I would suspect that colloquially, all such shafts are known as 'line shafts' and the whole agglomeration of shafts, pulleys, belts, ropes, etc, referred to as 'lineshafting' -- though obviously you'll need some refs for that!
 * -- EdJogg (talk) 13:38, 10 December 2010 (UTC)

Citations and errors
Belper North Mill did not have a rope race- which leads me to want to see the citations. Comment above questions details of image. --ClemRutter (talk) 17:59, 9 December 2010 (UTC)

List
I would transfer this lot to a separate article if I could think of the correct title. List of locations with line shafting is one possibility-- but there must be a better way. --ClemRutter (talk) 12:59, 10 December 2010 (UTC)

Reference
Got one
 * see pages 255 et seq.--ClemRutter (talk) 12:59, 10 December 2010 (UTC)

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More recent use
Line shafts were still being used in at least one specialised field until the early 1980s. Personal knowledge, I saw them - but have no sources.

A key step in the viscose process involves large amounts of carbon disulphide (CS2). The reaction vessels in (a now highly obsolete, but instituted by the 1930s) batchwise process were cylindrical or hexagonal, were some 2-3m long and 1.5-2m across, and were rotated about their axes. There could be two dozen or so in a process room. Each batch required some tens of kg of CS2 - which has a nasty reputation for catching fire on steam lines, and for going *bang!* if mixtures with air meet sparks. The vessels (called churns or barattes) were driven by line shafts, using electric motors on the other side of a wall, with a soft gasket or a drape where the shaft went through. The belts were of heavy canvas, perhaps 5mm thick and 10-15cm wide, with the ends joined by stitching or stapling. They may have been about 4m in circumference. "Belt fitter" was a recognised skilled trade - even if one sometimes derided by tradesmen who'd "served their time" such as fitters and chippies. One kludge to solve the problem of a slipping belt caused by bearing wear or suchlike was to "cross the belt" - i.e. to fit it in a figure-of-eight conformation. The vessel would rotate in the opposite direction to all the others, and the belt would need more frequent servicing, but that didn't matter so long as the vessel rotated. Narky Blert (talk) 22:42, 28 May 2017 (UTC)