Rostock Max V2 Spool Holder

thingiverse

Inspired by Fazerboy's model, I thought this looked like a great spool holder for my Rostock Max V2. It's not as sophisticated as RMLynch's design (http://www.thingiverse.com/thing:1060029) but easier to get spools on, making it a nice compromise. The hardware I used consisted of items I had lying around. For the bearings, I used a Gear head bearing 9.5x22.2x7.14mm (available on eBay: http://www.ebay.com/itm/NEW-STIHL-Trimmer-Gearhead-Ball-Bearing-FS-44-74-80-85-/350330092447?hash=item51914cfb9f:m:m3NkvbAKn0UHqUhzku2ysrw). For the shaft, I used a 3/8 inch rod with a nominal diameter of 9.47mm. Make sure the bearings fit before committing. I found some inconsistency in different 3/8 inch rods, so you may need to do some trial and error. To connect the end cap, I used two #4x1/2 pan head sheet metal screws. These don't hold any weight, so they don't have to be too tight. The spacers are 14.5mm long and allow for five bearings. If you want more bearings, you can do the math and adjust the spacer length accordingly. In real-world use, this spool holder works great and probably reduces 80 to 90% of the tension off the filament. Print Settings: Printer Brand: SeeMeCNC Printer: Rostock MAX Rafts: No Supports: No Resolution: .2 Infill: 20% Notes: Print in a horizontal direction so that the layers are lined up for greatest strength. Two small areas of bridging, but these aren't critical. Post-Printing: Make sure shaft and spacers all fit nicely before assembly. Some adjustment may be required (knife, file, etc). The parts should fit fairly snug. I did use a light hammer to fully seat the main shaft into the base. How I Designed This: Using Fazerboy's model as a guide, I paired the bearing tray with the Rostock Max spool base. I made the bearing area a bit longer to fit the largest spool I had and I made it a bit lighter since it doesn't hold any weight. The shaft extends the length of the base so it holds all the weight of the spools. Note that not all spools are created equal. I do have one spool that doesn't have a solid center, so for this spool, I might need to create an adapter spindle.