R188 steel bearing R188 hybrid ceramic bearing for spinner fidget hand toy Adult Amazon CE

Our spinner specification:
It is not be 3D printed. It is ABS injection molding. The spinner has a smooth finish, and not has sharp edges.
Central bearing: Si3N4 Hybrid Ceramic, in order to have a minimal rolling resistance for the longest spin times. The average spin time can be at least 2 minutes. Central bearing is well balanced, so when spinning in hand and on the table it is not wobbling. 
So the most important factors are being smooth and silent and quick.
Plastic center caps can be sturdy enough and not easy to fall out after a while.
It has a high-grade plastic, so you don't have to worry about the metallic smells on your fingers that you get with metallic based spinners.

Specifications:
Material: ABS + metal
Function: Educational toys, interactive toys
Weight: 70 g
Features:
Great For Fidgety Hands, ADD & ADHD Sufferers Helps Relieve Stress
Perfect size suitable for Adults and kids
Easy To Carry,Small,Simple,Discrete and Fun,also effective for Focus and Deep Thought
Use This Way:Hold spinner in one hand and use the other hand to spin it rapidly using small continuous strikes to keep it spinning indefinitely with practice,spinners can be spun using one hand only using the fingers of one hand to stop and start spinning

The Goal
A fun and easy way to increase focus and concentration while decreasing stress.
To design and create a high performance, multifunctional, customizable, and affordable fidget toy. lt is the unique fidget solution for all ages and fidgeting needs.
Hand spinner fidget toy basic Body material:
ABS Plastic (injection molding or 3D printed)
Acrylic
Stainless steel
Bronze
Wood

Ball Bearing Material
608 bearing(inner diameter 8mm,outer diameter 22mm,thickness 7mm)
1.608 Ceramic Hybrid Bearing with stainless steel races and ceramic balls
2.608 hybrid bearing with chrome steel races and ceramic balls
3.608 full stainless steel bearing
4.608 full ceramic bearing(Silicon nitride ceramic Si3N4 and Zirconia ceramic ZrO2)
High precision rating 608 bearing ceramic bearing 608

The Method
Spinner
Grasp Spinpal's center spin handle in between your pointer finger and thumb (top and bottom orientation does not matter). Then use your other hand to let her rip. Don't worry Spinal has been tested to spin even in the smallest of hands, includes children as young as 8 years old.
 
Roller
Grab on to one of Spinpal's three stainless steel balls and rotate in between fingers.
 
Slider
Place Spinal top down on a flat surface and slide away.
 
Top Spin
Place Spinal bottom down on a flat surface. Then support Spinpal by its three arms and spin like a top.
 
Invert Spin
Thread the supplied stainless steel fastener (Extender) into the top of Spinpal's center spin handle. Grab the fastener with any two fingers and spin with the other hand. This function is great for smaller hands.

Quick Details
Specifications
1.low noise, low vibration, high precision
2.high sealing performance, high operation performance
3.Low noise, stable performance and durable
4.long service life and without abnormal sound, etc.  

Packaging & Delivery
Packaging Detail: Tube & Box Marking: 1. Lasermarking on outerface of outerring like Brand, 2. Print Brand on Rubber/Metal shield
Delivery Detail: 15days

Application:
They can be used as high-speed bearings, high temperature bearings, corrosion-resistant bearings, shielded bearings, electrical insulation bearings and so on.
1, Material: ZrO2, Si3N4, SiC and Al2O3, etc.
Characteristics of silicon nitride ceramic bearing:
Because of its high compressive strength, contact fatigue resistance that is superior to chrome steels, electrical resistivity and low coefficient of friction versus bearing steels, silicon nitride ceramic bearings can be widely used in aviation, aerospace, marine, petroleum, chemical, automotive, electronics, metallurgy, electric power, textile, pumps, medical equipment, scientific research, national defense, military and other domains.
Materail of bearing:
Rings: Silicon nitride ceramic
Balls: Silicon nitride balls.
Cage: PTFE, nylon 66, PEEK, SS304, etc.