Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry (1921)
Wright, Roydon Vincent, 1876- ed, Little, John G., joint ed, Augur, Robert C., joint ed · New York, N.Y., Simmons-Boardman Publishing Co · leaf 462
and making a moredurable surface for carrying the load. Steel rollers are usually made of seamless tubing havingends of drawn steel or cast iron forced in and held bycrimping or spot welding. It is very necessary that theseends be accurately made so that the rollers will revolveabout their true… … Figs. 98 and 99 to No. 12 gage or heavier, but it is desirable to keep therevolving parts as light in weight as is consistent withstrength, stiffness and durability. Cast iron rollers are not common for general packageconveying, but the concave cast iron roller is widely usedwhen cylindrical…
Hoisting machinery · Conveying machinery
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