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20/02/2017 at 02:28

Hi all,
There’s some really great discussion going on here! My main question is regarding the size of the finished piece. This is, of course determined by the die, but, if working backwards from a design, how does this determine the size, ratio or OD of the screw? In other words, is there a formula for determining whether a certain screw (I’ve go my eye on one on ebay) will be suitable for the amount of material that I want to put out? My first instinct was that the barrel and screw would have to be of a greater diameter than the outer-most boundaries of my extrusion die, but a little bit of reading and youtube watching suggests that this may not be necessarily the case. Any help would be appreciated.

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