yoyo ball bearing R188V

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Part Number R188V
Bearing type BALL
Structure Single Row
Load Direction Radial
Seal type Open
Bore diameter(d) 1/4″︱6.35mm
Outer diameter(D) 1/2″︱12.7mm
Width(B) 3/16″︱4.762mm
material Chrome steel 52100(Gcr15)
ring material Chrome steel 52100(Gcr15)
cage material 300 Series Stainless Steel
ball material Chrome steel 52100(Gcr15)
shields material 300 Series Stainless Steel
Grade ABEC-1(higher grade available)
Clearance C0(other clearance available)
BALL SIZE(mm)  1.588mm
lubrication grease(oil available)
Temperature Range -30℃~130℃
weight(g) 1.6
ISO9001:2015 PASSED
Dynamic Load Rating (Cr) 920 N
Static Load Rating (Cor)  355  N
yoyo ball bearing r188v

Yoyo ball bearings also called yoyo bearings or ball bearings yoyo,it is referred ball bearings used in yoyo.

Runstar is a professional yoyo ball bearings manufacturer who is the first one to design and manufacture stainless steel U groove ball bearings for yoyo in China, the yoyo ball bearings from Runstar are very pop worldly for its high precision ,fast speed and long life in yoyo.

Compared with common miniature bearings, yoyo ball bearings need to rotate very smoothly and very freely,it need a very smooth surface when grinding. In order to meet the needs in shape, Runstar has designed many shapes for choices,there are  U groove,V groove ,T Groove and other concave bearings on the surface of outer ring.we also have yoyo ball bearings with with 8 cuts on concave groove.

we design and make high speed yoyo bearing with  different shapes and material for choices. with 8 cuts on concave groove.

In order to reduce friction, prolong idling time and make players have a better experience, Runstar has specially designed and modified the original seven balls  of yoyo ball bearing into ten balls, if you hold the inner ring with one hand and turn the bearing with the other hand, the yoyo ball bearing can rotate for 20 seconds at least, there are chrome steel(Gcr15) and stainless steel (440 or 420) for choice in Runstar, Custom-made yoyo ball bearing are accepted in Runstar. All Runstar’s yoyo ball bearing are strictly controlled under ISO9001:2015,with RoHs and REACH compliance.


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