SCREW WEAR GUIDELINES

Injection/Extrusion Screw Replacement Quick Reference Guidelines

Screw-DWG
Screw Size New Screw Clearance Worn Screw Clearance Max Wear Clearance
½” 0.003 – 0.004” 0.008 – 009” 0.012 – 0.015”
1” 0.003 – 0.004” 0.018” 0.020”
1 – 1/2” 0.005 – 0.008” 0.020” 0.025”
2 – 1/2” 0.007 – 0.010” 0.021” 0.030”
3 – 1/2” 0.010 – 0.012” 0.030” 0.036”
4 – 1/2” 0.010 – 0.013” 0.030” 0.039”
6” 0.013 – 0.016” 0.039” 0.048”
8” 0.016 – 0.019” 0.048” 0.057”
10” 0.020 – 0.025” 0.060” 0.075”
25mm 0.003 – 0.005 0.013 – 0.014 0.019 – 0.020
30mm 0.003 – 0.005 0.014 – 0.015 0.021 – 0.022
40mm 0.004 – 0.005 0.014 – 0.015 0.022 – 0.023
60mm 0.005 – 0.006 0.016 – 0.017 0.028 – 0.029
80mm 0.006 – 0.007 0.019 – 0.020 0.034 – 0.035
90mm 0.009 – 0.010 0.021 – 0.022 0.036 – 0.037
100mm 0.009 – 0.010 0.024 – 0.025 0.041 – 0.042
120mm 0.012 – 0.013 0.030 – 0.031 0.049 – 0.050
140mm 0.014 – 0.015 0.034 – 0.035 0.055 – 0.056

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