Decent sized (53mm diameter) ball bearing fidget spinner with a nice smooth toroidal shell. Optimized for low material usage and fast print time. For me it spins freely straight off the printer, with low friction. A good test print.

See also the new 2 layer bearing version: https://www.thingiverse.com/thing:6565065 and 3 layer version: https://www.thingiverse.com/thing:6565946

There are 12 balls of 10mm diameter. The overall diameter is 53mm and height 10mm approx. Clearance 0.3mm.

Supports should not be needed due to the small flats on the bottom of the balls .

⚠Warning⚠

Be careful in environments with young children and pets!

This model contains small parts.

If not properly stored in an environment with young children or pets, it may lead to accidents such as accidental ingestion or injury.

If infants or pets are present, please take appropriate measures depending on the situation, such as refraining from 3D printing or storing in an appropriate place.

Do not apply strong force!

Applying strong force to a 3D printed model or throwing it may damage the model and lead to accidents such as injuries.

In addition, debris from damage to the model may be accidentally ingested by infants or pets.

If the model is damaged, dispose of it immediately.

Store them in an appropriate place.

After 3D printing, store the model in an appropriate place out of reach of young children and pets.

Proper adherence to the precautions will ensure the safe use of the model.

Print Settings:

Printer brand:

Creality

Printer:

Ender 3 Pro

Rafts:

No

Supports: optional

Resolution:

0.2mm layer height

Infill:

20%