Boncuk
New Member
Hi All,
more and more components are thrown on the market having connecting pins with unsymmetrical measurements like pushbottons and shielded connectors.
E.g. a Scart connector has metal strips of 0.4mm thickness and 2mm length. Drilling a hole of 2mm diameter will not result in the necessary mechanical stability, hence a slotted hole of 0.5 X 2mm would be desirable.
My PCB manufacturer in Bulgaria uses a minimum diameter of 1mm for the milling tool which is still unsatisfactory resulting in unnecessary fills with soldering tin.
I guess he uses this tremendeously oversized tool for safety reasons. Cutting a slotted hole in FR4 material means a lot of stress on the tool. Own experience proves that high cutting speed (longitudinal movement) results in many broken tools, which can only be avoided by extremely slow movement with least stress on the tool.
What is the minimum tool size your PCB manufacturer uses for slotted holes?
Regards
Boncuk
more and more components are thrown on the market having connecting pins with unsymmetrical measurements like pushbottons and shielded connectors.
E.g. a Scart connector has metal strips of 0.4mm thickness and 2mm length. Drilling a hole of 2mm diameter will not result in the necessary mechanical stability, hence a slotted hole of 0.5 X 2mm would be desirable.
My PCB manufacturer in Bulgaria uses a minimum diameter of 1mm for the milling tool which is still unsatisfactory resulting in unnecessary fills with soldering tin.
I guess he uses this tremendeously oversized tool for safety reasons. Cutting a slotted hole in FR4 material means a lot of stress on the tool. Own experience proves that high cutting speed (longitudinal movement) results in many broken tools, which can only be avoided by extremely slow movement with least stress on the tool.
What is the minimum tool size your PCB manufacturer uses for slotted holes?
Regards
Boncuk
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