Note the sharp corners and square edges on a
new feedscrew.
On a new or rebuilt feedscrew you will notice
that the flighting is thicker. When new or
rebuilt, the corners are square. Notice the nice
filet welds attaching the flighting to the shaft.
Sharp cupping is needed to aggressively
grasp the product that falls into the hopper.
Shown below is a new drive spline with a
thrust screw installed.
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