M24 model : spur gear

thingiverse

You need two M3x3 bolts or a strong adhesive to assemble the spline shaft and boss. How to Assemble: https://youtu.be/Ib9_9kAIqBI I share the 3D printed output of the people who participated in the 3D printing win-win project. https://www.facebook.com/cybbiggu/posts/2597423803673216 <<3D Printing and Assembly Caution v.1a2>> 1. To improve the quality of the print (dimensional accuracy, etc.), follow these tips: a) Avoid printing multiple types of parts at once. b) Limit the number of parts printed simultaneously. 2. The closer the distance between the nozzle and bed (Z-offset value), the more likely the part will be stuck to the bottom surface, like an elephant's foot. This is especially true for parts with round holes or spline holes, which can become misaligned due to the stickiness. a) Adjust the Z-offset value to minimize this issue. 3. When assembling two parts, they may feel tight, loose, or somewhere in between. a) The first assembly after printing may be especially tight. b) Try wiggling and removing the parts several times; most will loosen up gradually. c) If it's still stubbornly stuck or requires excessive force, check your print quality. 4. If the spline shaft and gear, or boss and gear are particularly difficult to assemble: a) Try reducing the XY scale of the spline shaft by 5%. b) Reassemble and see if it improves the situation. 5. When using screws with spring pins: a) Avoid removing them after initial assembly. b) If they do come loose, try re-printing or applying strong adhesive. 6. To secure the boss to the spline shaft, you'll need M3x3mm socket head cap screws and 1.5mm hex keys. a) Be cautious not to overtighten, as this can cause the threads to become damaged and the holes to become loose. b) Tighten until snug but not too tight. 7. If you can't find socket head cap screws: a) Apply a small amount of blue glue (from a plastic container) to the M3 hole on the boss. b) Let it dry before reassembling. 8. If your part breaks during assembly, try using strong adhesive for partial repair. 9. Ensure there is a 0.5mm gap between moving parts to prevent jamming. a) Use tools like pliers, wire, sandpaper, or deburring tools for post-processing if needed.