NOTE: A bore gauge that still contains plastic can damage the measuring head of a precision bore gauge.
WARNING: When performing a field measurement with a barrel still on the machine, DO NOT measure the barrel bore behind the feedport. All critical wear that affects the performance of an injection unit is on the endcap side of the feedport. Severe damage can occur when the measuring head enters the feedport of the barrel.
NOTE: YOU WILL NOT TAKE MEASUREMENTS IN THE FEEDPORT. Leave up to a 2" gap between the gauge and the feedport. Instead of the feedport, you should concentrate on the stroke area and the transition section of the barrel. This is the major area of concern.
Remember:
Always clean the barrel thoroughly prior to measuring.
Allow barrel to cool to an ambient temperature before measuring.
Move the bore gauge slowly to ensure proper measurements and avoid damaging the bore gauge.
Do not apply oil to the bore gauge or barrel.
Do not push or jerk the bore gauge.
NEVER put bore gauge into a hot barrel or a bore containing plastic.
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