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B&N Mobile Directo (w/rotator)
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B&N BN44E With rotation
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution — Noncommercial
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
- 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
- There are two pictures showing where the various parts go, with the exception of:
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