B&N Mobile Directo (w/rotator)

This is an attempt to add a belt drive similar to what is on an actual bn44e.

• This is just the changed parts - you'll need to get the remaining parts from
  • https://www.printables.com/model/1227933-bn-mobile-directo-not-rotational
  • https://www.printables.com/model/1003459-13-scale-aca-banshee-110c (stator and rotor)
• Is this tested? - No
• things not handled:
  • The rotation of the power cable - Ideally you'll need some sort of slip ring for the power cable to deal with it's twisting
  • There is nothing but gravity holding the base onto the Platform (big gear), also no guarantee that the siren will balance on the platform, you may need ballast. 
  • I've made no attempt to size the belt
  • There is no Belt guard - I ran out of initiative
  • I'm hoping the flats on the pulley are compatible with the motor's shaft
• How this goes together
  • There are two pictures showing where the various parts go, with the exception of:
    •  the worm-gear-shim - this goes under the worm-gear
    • I didn't show the bearings - the locations to press them in should be pretty easy to figure out
    • The Cotter Pins -The small holes (3mm) in the shafts are for cotter pins, you could probably use roll pins instead - they don't transfer load they're just keeping things together
  • I left a lot of slop, so you may want to place some washers under the cotter pins to tighten things up
  • you need two pulleys - one goes on the worm shaft and the other one (green)goes on the end of the motor as shown.  the one on the worm shaft is held in place with a cotter pin, whereas the one on the motor shaft is held in place by the nut and setscrew
  • place the 8mm Balls in the groove on top of the Rotator-Platform, then set the whole assembly on top such that the Balls engage the groove in the bn-bn44e-basebn-bn44e-base

Required hardware:

• 608 Bearings (8mm skate bearings) - for example: https://www.amazon.com/Sonorphine%EF%BC%BB10-Pack%EF%BC%BD608-2RS-Bearings-Bearing-Skateboards-Rollerblades/dp/B0FHH25X7C
• 8mm Balls - for example: https://www.amazon.com/ZOYOPRECISION-Bearing-Balls-Stainless-Precision/dp/B0CR72MDF2
• 8mm round belt, make to fit: https://www.amazon.com/High-Performance-Urethane-Belting-Transmission-Polyurethane/dp/B07L3Y4JLZ
• Cotter Pins - No More than 3mm in dia- for example: https://www.mcmaster.com/products/cotter-pins/cotter-pins-3~~/system-of-measurement~metric/diameter~2-5-mm/length~40-mm/
• 4mm nut and setscrew