Quick answer: A jammed pen mechanism often reflects wrong pressing depth, contamination or misalignment; forcing it can make repairs harder.
Do not force a jam
Kit manufacturers have different pressing dimensions. The instruction sheet for the exact hardware is the primary diagnostic reference.
Check external alignment
If the component is permanently distorted, replacement hardware may be safer than trying to bend it back.
Revisit the tube preparation
Do not drill, heat or strike a fully assembled pen without an approved disassembly method and correct support tools.
Use kit-specific troubleshooting
Keep a paper record of the kit part number and assembly sequence, especially if several people are making pens in the same workshop.
Recognize the moment the mistake happened
If the barrel is split, do not hide the problem under a finish and give the pen to someone else.
How to avoid another jam
Arrange fittings in order, square and clean tubes after glue cure, and press one component at a time while checking alignment. Record the actual kit number so replacement mechanisms and refills can be identified.
Sources and further verification
Source links are included to help you confirm equipment specifications, accessories and recommended safety practices. Specifications may change with product revisions.
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