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Quick Details

  • Structure: Deep Groove
  • Type: Ball
  • Brand Name: FreeRun
  • Bore Size: 3.175 - 6.3500 mm
  • Outside Diameter: 7.9375 - 13.000 mm
  • Model Number: R188KK,R188ZZ,MR105ZZ,MR105KK,685ZZ,685KK,686ZZ,MR84ZZ,R155ZZ,R168ZZ
  • Precision Rating: ABEC-1,ABEC-3,ABEC-5
  • Seals Type: ZZ(two metal shield) or Open Type
  • Number of Row: Single Row
  • Place of Origin: Fujian, China (Mainland)
  • Yoyo Bearing Material: Chrom Steel(AISI52100),Stainless Steel (AISI440C),Ceramic(Si3N4)
  • Retainer Type: CROWN retainer
  • Retainer material: Stainless Steel,PTFE, Nylon, PEEK
  • Vibration level codes: V4, V3, V2, V1
  • Internal Clearance Code: C0,C2,C3,C4,C5
  • Lubrication: Dry, Oil, also Grease
  • Balls: Chrome Balls, Stainless Balls or Ceramic Balls (Si3N4)
  • Rubber Seal Colour: Black, Blue, Yellow, Red, Orange etc

Packaging & Delivery

Packaging Details Ususally, every 10 sets bearing are packed into plastic tube or raped by rustproof paper and paced into carton box. Single package is available,that is,each set bearing is contained into plastic bag and then packed in small inner box. Industrial Packing: 100 pcs or 50 pcs in long plastic tubes.
Delivery Time Shipped in 15 days after payment

High Speed Golden YoYo KK concave bearing


Product Description

Freerun  is a specialized manufacturer of KK bearing,Konkave/Concave Yoyo Bearings, Flat yoyo ball bearings,ceramic yoyo bearings, stainless yoyo bearings.


Bearings is the part in between the 2 sides of the yoyo and is fitted onto a axle. 


So good bearings are very important to a spin of YoYo.  FreeRun can supply you this kind of high quality bearings.




Konkave/Concave Bearings


 Flat Bearings






Freerun Chrome Yoyo Bearings 

It have long been the industry standard for Yoyo enthusiasts the world over. These bearings have chrome steel races, balls, retainers and shields. 

Stainless Steel Yoyo Bearings
In an attempt to improve performance of these bearings,are specially designed for competitive yoyo enthusiasts. Competitive players sought out high ABEC bearings made of high grade materials such as stainless steel. The higher the ABEC rating, the lower the friction and smoother and faster roll. ABEC ratings are given in odd numbers only 1,3,5,7 and 9.

Ceramic ball yoyo bearings
Today, ceramic bearings are the hottest thing in yoyo technology. They are lighter, smoother, stiffer, harder, and corrosion resistant. These characteristics allow for a wide range of performance enhancements in bearings. Ceramic dissipates heat quickly, reducing friction and wear while maintaining a precision smooth surface. Today's leading edge ceramics are made with Silicon Nitride (Si3N4) and have characteristics similar to the heat absorbing, highly resilient tiles on the Space Shuttle.Yoyo Ceramic  Bearings are specially designed for competitive Yoyo enthusiasts.














According to our sales experience, Dry or Oil Bearings will be good choice for YoYo. 



Contact Information


     Daisy Ye







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China (Mainland) | Manufacturer, Trading Company
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