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Light bulb master copy for mould
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<blockquote data-quote="PeterT" data-source="post: 1447" data-attributes="member: 22"><p>I do have a manual lathe. But sorry, unfortunately I cant take on any projects right now. I'm hoping to talk you out machining a male mold bulb for the reasons mentioned, but you do proceed down that path, there might be some folks here who can help. I see kind of 2 modes: a cnc turned profile (thus requires a 3d solid model cad file to import). Or a manual method where the bulb shape is evolved by progressive depth cutting the profile in step-overs & then contour blending the ridges & finishing. Lathe attachments exist for decorative turning (ball turning accessories) but I suspect would be of limited uses because of the shape transition to the neck. The threads (if desired) would be added operation. 'Real' threads would require that lathe capability. Maybe you could get by with fake threads meaning planar rings vs. a true helical pitch.</p></blockquote><p></p>
[QUOTE="PeterT, post: 1447, member: 22"] I do have a manual lathe. But sorry, unfortunately I cant take on any projects right now. I'm hoping to talk you out machining a male mold bulb for the reasons mentioned, but you do proceed down that path, there might be some folks here who can help. I see kind of 2 modes: a cnc turned profile (thus requires a 3d solid model cad file to import). Or a manual method where the bulb shape is evolved by progressive depth cutting the profile in step-overs & then contour blending the ridges & finishing. Lathe attachments exist for decorative turning (ball turning accessories) but I suspect would be of limited uses because of the shape transition to the neck. The threads (if desired) would be added operation. 'Real' threads would require that lathe capability. Maybe you could get by with fake threads meaning planar rings vs. a true helical pitch. [/QUOTE]
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