[GreenKeys] Model 32/33 Teletype P/N: 180502 Print Hammer Head Drawings

[David Tumey]

Finally after a few small setbacks, I have completed the SolidWorks drawing for the 180502 Print Hammer Head.  Special thanks to Don House and Wayne Durkee for helping me get sample parts to measure.  Don literally ripped a print hammer out of his machine and mailed it to me as the only teletypes I have access to are in Dayton OH with my son.  Special thanks to Dr. Tony Xu for creating the drawing for me!

Attached are the following files (all dimensions in mm):  180502.pdf, 180502.eprt (which can be viewed with the free eDrawings viewer found here: http://www.edrawingsviewer.com/), 180502.sldprt (which can be converted to an .stl file for 3D printing).

We have tried the part on our 3D printer with limited success.  (1) It does not really have an original look, and (2) I doubt it will wear as well as an original part.  Because of these limitation, I have decided to go all-in and have an injection mold tooled up for the part.  I have two quotes in process.  I am planning on shooting the part with a black 70 Shore A Thermoplastic Elastomer (TPE) material.  Once I have some samples, Wayne has volunteered to test them in use, and after we confirm the correct material selection, I will shoot between 2,000 and 10,000 pcs.  I will circle back with the Greenkeys once I have finished parts in hand.  I am estimating 8-10 weeks to machine the tooling and 4 weeks to vet the parts.

As I mentioned, the part can be made on a 3D printer with the above SolidWorks drawing.  If you would like to try this, I recommend the following filament:  https://www.matterhackers.com/store/3d-printer-filament/175mm-black-tpe-threequarter-kg.  We use a Cubify Cube 2 but my engineer tells me this will work with the Makerbot Replicator 2 printer as well. 

I will keep you posted on my progress.

73's
--dave
W5DT
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