Roller Bearing - 3/4" PVC

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Finished bearing size of 17 mm wide x 78 mm with 7 rollers. I tried to make this build a snug fit. Your printer/filament may give you different results. I found that the same part will be slightly different in size when color was changed. Part sizes given will not usually print that size. Printer: Check bed/nozzle clearance. The 1st filament layer should be same as rest to try and get square edges. Cleanup: Remove ridges on vertical edges, chamfer holes and flat sand components. A finger/finger nail will help. Bearing Rollers; String them on a 7/32 drill bit by hand (pliers). Spin the bit while holding file/sand paper to the rollers. Round is good. Next, Spin the bit while holding the outer most roller with the pliers to clean the inside hole and remove one at a time. The rollers can be reloaded on the bit and held into place with a discarded roller that has been heated in water and formed around the bit. A #1 drill bit will give .2 mm larger hole. Scale as necessary. Bearing sides; Slow print speed to around 25% when starting the pins. A timer will work as a reminder. Check the mating surfaces. Work with the parts until the desired fit is achieved. Insert the bearing pin side into the collar a little past flush. Load the rollers. Check the fit up by inserting a piece of 3/4" PVC. Then rotate the bearing hole side until the flat sides of the circle & pins line up. Press together. That's the bearing part. You may stack as many together is you like. There are two options for…