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| Bare Wire and the American Wire Gage (AWG) - A Review Part 1 - The Fundamentals - By P. Stewart-Hay |
| Slip in Nonferrous Drawing Machines - By P. Stewart-Hay |
| The Standard Plastic Extruder Screw |
| The standard plastic extruder screw typically exhibits the following characteristics: |
| A Right Thread with Total Length of 20 to 30 D | A Feed Section Length of 4 to 8 D |
| A Metering Section Length of 6 to 10 D | A Total Number of Parallel Flight Designs of 1 |
| A Flight Helix Angle (Pitch) at the I.D. of 17.66o | A Flight Width of 0.1 D |
| A Feed Section Channel Depth H of 0.15 to 0.20 D | A Channel Depth Ratio (Compression) of 2 to 4 |
| The vast majority of extruder screws in service today fall within these design approximations. |
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