I've had some free time on my hands lately and I've been wanting to try the Schmidt RPS Rollerball. This lets you use fountain pen ink in a rollerball tip. Supposedly you can swap the RPS with a #5 FP nib to make a convertible pen. I've found that to be not so easy with a JOWO #5 feed, the dimensions are different. Maybe the Schmidt #5 is closer. The body and cap are 6061 Aluminum finished with a brushed finish to help hide future wear. The section is Acrylic Acetate, made to accept the Schmidt K6 threaded ink converter.
All the parts were turned on a 7 x10 metal lathe using a pattern tracing modification to make the tapers. Using my new slow speed feed left a surface finish that only required sanding at 500 grit for the final brushed finish. The clip is from a PSI seam ripper kit. The section threads are M9 x 0.75 and the Cap threads are M11 x 0.80 triple start. The body is 11mm diameter and the cap is 13mm.
Danny
All the parts were turned on a 7 x10 metal lathe using a pattern tracing modification to make the tapers. Using my new slow speed feed left a surface finish that only required sanding at 500 grit for the final brushed finish. The clip is from a PSI seam ripper kit. The section threads are M9 x 0.75 and the Cap threads are M11 x 0.80 triple start. The body is 11mm diameter and the cap is 13mm.
Danny