Solder Paste Dispenser (Small Syringe)

thingiverse

I printed this thing without double-checking my stock of solder paste syringes. It's a nice design and print, but way too big for what I currently have on hand. I got mine from Cash Olsen several years ago in 30 mL syringes, which are still viable after being kept refrigerated. Making a smaller dispenser is definitely worthwhile for me. I thought about modifying and scaling the evgs Thing, but often it takes more work than just drawing the thing from scratch myself. Since I work fairly fast in F360, that's what I did instead. Since 30 mL syringes are 8 mm ID, the rod had to be smaller to fit inside. I threaded it with standard M8 threads and made it a little shorter. The slot in the body to hold the syringe is now 25 mm wide instead of 35 mm to fit the smaller syringe. The body and knob are the same size as evgs, except that the nut is threaded for M8. I wanted these two parts about the same size as the evgs Thing since my hands are the same size using either one. It fits comfortably like his did. The smoother the nut and rod work together, the easier it is to use this thing. It's worth taking the time to chase the threads with a suitable tap and die. As an experiment, I tried different lubricants (silicone oil, machine oil, graphite powder), but none of them beat just cleaning up the threads. Since it's a simple tool, the design is very straightforward as well. I didn't include anything that wasn't functional. If you use smaller 30 mL syringes for solder paste or flux, this one might be a better choice for you. However, with both now, I'm covered for just about anything except a turkey baster. Nothing special was needed to print it. I used an 0.2 mm draft mode. No special post-printing steps were required. This nice simple design works as originally intended by several designers.