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Inch Miniature Bearing

Miniature bearings are called instrument bearings. Its compact size and outstanding performance characteristics make it an important component of many industries. They are used in various applications such as gyroscopes, anemometers, flow meters, micro gearboxes, small motors and radio control models.

Bearing No.SEAL TYPEBore diameter(d)Outer diameter(D)Width(B)BALL SIZE(mm)BALL QTYweight(g)
R1-4open5/64″︱1.984mm1/4″︱6.35mm3/32″︱2.381mm170.4
R1-4ZZShields5/64″︱1.984mm1/4″︱6.35mm0.1406″︱3.571mm170.53
R1-4 2RSRubber seal5/64″︱1.984mm1/4″︱6.35mm0.1406″︱3.571mm170.53
R1-5open3/32″︱2.381mm5/16″︱7.938mm0.1094″︱2.779mm1.58860.6
R1-5ZZShields3/32″︱2.381mm5/16″︱7.938mm0.1406″︱3.571mm1.58861.15
R1-5 2RSRubber seal3/32″︱2.381mm5/16″︱7.938mm0.1406″︱3.571mm1.58861.15
R133open3/32″︱2.381mm3/16″︱4.762mm0.0625″︱1.588mm0.870.1
R133ZZShields3/32″︱2.381mm3/16″︱4.762mm3/32″︱2.381mm0.870.15
R133-2RSRubber seal3/32″︱2.381mm3/16″︱4.762mm3/32″︱2.381mm0.870.15
R144open1/8″︱3.175mm1/4″︱6.35mm3/32″︱2.381mm170.27
R144ZZShields1/8″︱3.175mm1/4″︱6.35mm0.1094″︱2.779mm170.4
R144-2RSRubber seal1/8″︱3.175mm1/4″︱6.35mm0.1094″︱2.779mm170.4
R2open1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.04
R2ZZShields1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.37
R2-2RSRubber seal1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.37
R2-5open1/8″︱3.175mm5/16″︱7.938mm0.1094″︱2.779mm1.58860.5
R2-5ZZShields1/8″︱3.175mm5/16″︱7.938mm0.1406″︱3.571mm1.58860.74
R2-5-2RSRubber seal1/8″︱3.175mm5/16″︱7.938mm0.1406″︱3.571mm1.58860.74
R2-6open1/8″︱3.175mm3/8″︱9.525mm0.1094″︱2.779mm1.58870.96
R2-6ZZShields1/8″︱3.175mm3/8″︱9.525mm0.1406″︱3.571mm1.58871.23
R2-6-2RSRubber seal1/8″︱3.175mm3/8″︱9.525mm0.1406″︱3.571mm1.58871.23
R2Aopen1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58873.3
R2AZZShields1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58871.23
R2A-2RSRubber seal1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58871.23
R155open5/32″︱3.969mm5/16″︱7.938mm0.1094″︱2.779mm1100.51
R155ZZShields5/32″︱3.969mm5/16″︱7.938mm1/8″︱3.175mm1100.61
R155-2RSRubber seal5/32″︱3.969mm5/16″︱7.938mm1/8″︱3.175mm1100.61
R156open3/16″︱4.762mm5/16″︱7.938mm0.1094″︱2.779mm1100.4
R156ZZShields3/16″︱4.762mm5/16″︱7.938mm1/8″︱3.175mm110
R156-2RSRubber seal3/16″︱4.762mm5/16″︱7.938mm1/8″︱3.175mm110
R166open3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.81
R166ZZShields3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.85
R166-2RSRubber seal3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.85
R3open3/16″︱4.762mm1/2″︱12.7mm5/32″︱3.967mm2.38172.21
R3ZZShields3/16″︱4.762mm1/2″︱12.7mm0.1960″︱4.978mm2.3817
R3-2RSRubber seal3/16″︱4.762mm1/2″︱12.7mm0.1960″︱4.978mm2.3817
R3Aopen3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
R3AZZShields3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
R3A-2RSRubber seal3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
R168open1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.57
R168ZZShields1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.6
R168-2RSRubber seal1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.6
R188open1/4″︱6.35mm1/2″︱12.7mm1/8″︱3.175mm281.6
R188ZZShields1/4″︱6.35mm1/2″︱12.7mm3/16″︱4.762mm282.32
R188-2RSRubber seal1/4″︱6.35mm1/2″︱12.7mm3/16″︱4.762mm282.32
R4open1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.46
R4ZZShields1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.54
R4-2RSRubber seal1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.54
R4Aopen1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.567.48
R4AZZShields1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.5610
R4A-2RSRubber seal1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.5610
R1810open5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.39
R1810ZZShields5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.57
R1810-2RSRubber seal5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.57
R6open3/8″︱9.525mm7/8″︱22.2250.2188″︱5.5583.9779.02
<a href="https://www.runstarbearing.com/product/bearing-manufacturer-r6zz/" style="outline: none !important;box-sizing: border-box;transition: all 0.2s& 
    Bearing   No.SEAL TYPEBore diameter(d)Outer diameter(D)Width(B)BALL SIZE(mm)BALL QTYweight(g)
    R1-4open5/64″︱1.984mm1/4″︱6.35mm3/32″︱2.381mm170.4
    R1-4ZZShields5/64″︱1.984mm1/4″︱6.35mm0.1406″︱3.571mm170.53
    R1-4 2RSRubber seal5/64″︱1.984mm1/4″︱6.35mm0.1406″︱3.571mm170.53
    R1-5open3/32″︱2.381mm5/16″︱7.938mm0.1094″︱2.779mm1.58860.6
    R1-5ZZShields3/32″︱2.381mm5/16″︱7.938mm0.1406″︱3.571mm1.58861.15
    R1-5 2RSRubber seal3/32″︱2.381mm5/16″︱7.938mm0.1406″︱3.571mm1.58861.15
    R133open3/32″︱2.381mm3/16″︱4.762mm0.0625″︱1.588mm0.870.1
    R133ZZShields3/32″︱2.381mm3/16″︱4.762mm3/32″︱2.381mm0.870.15
    R133-2RSRubber seal3/32″︱2.381mm3/16″︱4.762mm3/32″︱2.381mm0.870.15
    R144open1/8″︱3.175mm1/4″︱6.35mm3/32″︱2.381mm170.27
    R144ZZShields1/8″︱3.175mm1/4″︱6.35mm0.1094″︱2.779mm170.4
    R144-2RSRubber seal1/8″︱3.175mm1/4″︱6.35mm0.1094″︱2.779mm170.4
    R2open1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.04
    R2ZZShields1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.37
    R2-2RSRubber seal1/8″︱3.175mm3/8″︱9.525mm5/32″︱3.967mm1.58871.37
    R2-5open1/8″︱3.175mm5/16″︱7.938mm0.1094″︱2.779mm1.58860.5
    R2-5ZZShields1/8″︱3.175mm5/16″︱7.938mm0.1406″︱3.571mm1.58860.74
    R2-5-2RSRubber seal1/8″︱3.175mm5/16″︱7.938mm0.1406″︱3.571mm1.58860.74
    R2-6open1/8″︱3.175mm3/8″︱9.525mm0.1094″︱2.779mm1.58870.96
    R2-6ZZShields1/8″︱3.175mm3/8″︱9.525mm0.1406″︱3.571mm1.58871.23
    R2-6-2RSRubber seal1/8″︱3.175mm3/8″︱9.525mm0.1406″︱3.571mm1.58871.23
    R2Aopen1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58873.3
    R2AZZShields1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58871.23
    R2A-2RSRubber seal1/8″︱3.175mm1/2″︱12.7mm0.1719″︱4.366mm1.58871.23
    R155open5/32″︱3.969mm5/16″︱7.938mm0.1094″︱2.779mm1100.51
    R155ZZShields5/32″︱3.969mm5/16″︱7.938mm1/8″︱3.175mm1100.61
    R155-2RSRubber seal5/32″︱3.969mm5/16″︱7.938mm1/8″︱3.175mm1100.61
    R156open3/16″︱4.762mm5/16″︱7.938mm0.1094″︱2.779mm1100.4
    R156ZZShields3/16″︱4.762mm5/16″︱7.938mm1/8″︱3.175mm110
    R156-2RSRubber seal3/16″︱4.762mm5/16″︱7.938mm1/8″︱3.175mm110
    R166open3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.81
    R166ZZShields3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.85
    R166-2RSRubber seal3/16″︱4.762mm3/8″︱9.525mm1/8″︱3.175mm1.58880.85
    R3open3/16″︱4.762mm1/2″︱12.7mm5/32″︱3.967mm2.38172.21
    R3ZZShields3/16″︱4.762mm1/2″︱12.7mm0.1960″︱4.978mm2.3817
    R3-2RSRubber seal3/16″︱4.762mm1/2″︱12.7mm0.1960″︱4.978mm2.3817
    R3Aopen3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
    R3AZZShields3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
    R3A-2RSRubber seal3/16″︱4.762mm5/8″︱15.8750.1960″︱4.978mm2.38185.08
    R168open1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.57
    R168ZZShields1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.6
    R168-2RSRubber seal1/4″︱6.35mm3/8″︱9.525mm1/8″︱3.175mm1110.6
    R188open1/4″︱6.35mm1/2″︱12.7mm1/8″︱3.175mm281.6
    R188ZZShields1/4″︱6.35mm1/2″︱12.7mm3/16″︱4.762mm282.32
    R188-2RSRubber seal1/4″︱6.35mm1/2″︱12.7mm3/16″︱4.762mm282.32
    R4open1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.46
    R4ZZShields1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.54
    R4-2RSRubber seal1/4″︱6.35mm5/8″︱15.8750.1960″︱4.978mm2.38184.54
    R4Aopen1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.567.48
    R4AZZShields1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.5610
    R4A-2RSRubber seal1/4″︱6.35mm3/4″︱19.05mm0.2188″︱5.5583.5610
    R1810open5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.39
    R1810ZZShields5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.57
    R1810-2RSRubber seal5/16″︱7.938mm1/2″︱12.7mm5/32″︱3.967mm1.2121.57
    R6open3/8″︱9.525mm7/8″︱22.2250.2188″︱5.5583.9779.02
    <a href="https://www.runstarbearing.com/product/bearing-manufacturer-r6zz/" style="outline: none !important;box-sizing: border-box;transition: all 0.2s&