Easier to print (but longer) simple piston pen
Description
This is almost same simple pen https://www.thingiverse.com/thing:2969193 (in 2 sizes) but made for better printing (which made it longer, 45 degree threads and 45 degree surfaces) also now available design for Peter Bock nib modules (as well as old number 6 nib with feeder and unknown reform nib module). Also cap-thread now put on the same level with body which make it easier to hold, cup is tight and it is easy to polish the body. Here also tested technology of making ink-window. But ink window is optional and require way move polishing inside and without polishing outside it will not be transparent. Pens are made in PLA (blue & yellow-orange) and PETg (coral). Difference between 2 sizes: + S ~ 9mm/2mm thick; M ~ 10mm/2mm thick O-rings + M has no problem with breaking screw if inner tube of the pen is not well polished + S fit better in most hands when M only for relatively big ones + PETg has more problems with layers adhesion if fan is on, and it is almost impossible to print good screw for size S, so I used PLA To make pen you need: * nib #6 + feeder or Peter Bock nib-modules 060 or 250 * O-rings (see paragraph above) * different sand paper, super glue and some sticks to make devices for internal polishing * silicon grease As usual, sources can be found here: https://github.com/sanja-byelkin/SimplePistonPen
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