This is a rocket motor retainer for a 24 mm motor mount. The inner diameter is sized to fit Appogee thin wall BT-50 tubes. It will need modification if you want to use thick wall. I print these in ABS with 0.1 mm layer height for thread resolution, no supports.
I'm coaching a TARC team and we go through a lot of these...
24mm_Motor_Retainer.stp | 599.1KB | |
24mm_Motor_Retainer_Part_A.stl | 865.1KB | |
24mm_Motor_Retainer_Part_B.stl | 29.5MB |