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Since herringbone gears are easy to 3D print, it has become very popular to 3D print a moving herringbone planetary gear system for teaching children how gears work. An advantage of herringbone gears is that they don't fall out of the ring and don't need a mounting plate, allowing the moving parts to be clearly seen.
Easier to print, stiffer, and more brittle than other plastics. PLA+ is a term for any blend that enhances some characteristic. PETG Polyethylene terephthalate (glycol-modified), a plastic made by changing the chemicals used to synthesize the more common PET. Easier to print than ABS, and moderately better heat resistance than PLA.
3D printing, or additive manufacturing, is the construction of a three-dimensional object from a CAD model or a digital 3D model. [1] [2] [3] It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, [4] with the material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.
In November 2012, the U.S. Army developed a tactical 3D printing capability to manufacture critical components on the battlefield rapidly. [74] Additive manufacturing is now a capability at Rock Island Arsenal [75] where parts can now be manufactured outside a factory including: M1A1 Abrams tank turret [75] 40 mm grenade launcher [75]
A worm is meshed with a worm wheel, which looks similar to a spur gear. Worm-and-gear sets are a simple and compact way to achieve a high torque, low speed gear ratio. For example, helical gears are normally limited to gear ratios of less than 10:1 while worm-and-gear sets vary from 10:1 to 500:1. [45]
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