Inch R Series Miniature Ball Bearings

Radial ball bearings consist of an inner and outer ring with a cage containing a complement of precision balls. The standard Conrad-type bearing has a deep-groove construction capable of handling radial and axial loads from either direction in versatile designs that permit relatively high-speed operation.

R Series are made of Chrome Steel, pre-lubricated with grease and has rubber seals on both sides to protect the bearings from dust or any other types of possible contamination.

This is high quality miniature bearing used in skateboards, roller skates, wheel bearings, axial fans, motors, drive axles, clutch, idler wheels, HVAC, snow mobiles, miniature rc, fishing reel, miniature slot car and many other industrial applications.

Price: US $0.5-5 / Piece | 200 Piece/Pieces (Min. Order)

  • Product Details
Grooved raceways on inner and outer rings sustain moderate axial loads in both directions in addition to radial loads. Balls separated by steel cages permit high-speed operation. Constructed from high-quality SAE-52100 chromium bearing steel. Available open, sealed (2RS) or shielded (ZZ), providing high speed operation in a wide variety of applications. Some are available with double seals (2RSL). ZZ, 2RS and 2RSL are available pre-lubricated with upper premium polyrex grease. 
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Basic Bearing No. Bore d
inch
Outer Diameter
D
inch
Weight
W
Radius
r
min
inch
Basic Load Rating KN Ball Complement
open
inch
Shielded Sealed
inch
Dynamic C Static C0 No. Size mm
R156 0 .1875 0 .3125 0.1094 0.125 0.004 0.395 0.143
R166 0 .1875 0 .3750 0.125 0.125 0.004 0.71 0.268 8 1.588
R3 0 .1875 0 .5000 0 .1562 0 .1960 0 .006 1.31 0.49 6 2.381
R3A 0.1875 0.5 0.196 0.196 0.006 1.31 0.49
R168 0.25 0.375 0.125 0 .1250 0 .004 0.268 0.136
R188 0.25 0.5 0.125 0.1875 0.006 0.83 0.37 8 1.588
R4 0.25 0.625 0.196 0.196 0.008 1.48 0.615 8 2.381
R4A 0.25 0 .7500 0.2188 0.2812 0 .012 2.34 0.885 6 3.969
R6 0.375 0.875 0.2188 0.2812 0.012 3.3 1.4 7 3.969
R8 0.5 1.125 0 .2500 0.3125 0.012 3.912 2.245 8 4.763
R8-7 0.4375 1.125 0 .2500 0.012 3.912 2.245 8 4.763
R10 0.625 1 .3750 0.2812 0.3438 0.024 4.605 2.774 9 4.763
R12 0.75 1.625 0.3125 0.4375 0 .024 7.246 4.445 9 6.35
99502H 0 .6250 1.375 0 .4331 0.024 7.75 3.6 8 5.953
SC0563 0.9843 2.4409 0 .4704 0 .043 12.81 8.44 9 8.731
63/28 1.1024 2.6772 0.7087 0.043 26.7 14 8 11.5
MS12 1.25 3.1239 0 .874 0.043 25.5 17.58 7 14.2875
98205 0.9843 2.047 0.3543 0.039 8.21 6.6 11 6.35

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