Inch Flange Ball Bearings are one of the classifications under ball bearings . In Runstar Bearing, they are usually referred to a ball bearing from a bore diameter of 1mm to 10mm. they are usually called as instrument bearings or micro bearings that are widely used in widely used in the fields of precision instrument,home application,medical device,massage equipment,sports equipment,textile machinery,woodworking machinery,motor,power tool,water pump,air compressor,fishing reel and Yoyo etcs.Runstar Bearing has a full dimention of Stainless steel Inch Flange Miniature Ball Bearings for choice, the precision tolerance is from ABEC-1 to ABEC 9 for choice, there are 440(9Cr18),420(9Cr13) for choice in Runstar, 316 is sometimes available. Custom-made products is accepted in Runstar. All Runstar’s Bearings are strictly controlled under ISO9001:2015.

PART NUMBERSEAL TYPEBore diameter(d)Outer diameter(D)Width(B)BALL SIZE(mm)BALL QTYweight(g)
SFR0 open3/64"︱1.191mm5/32"︱3.969mm0.0625"︱1.588mm0.670.1
SFR0ZZShields3/64"︱1.191mm5/32"︱3.969mm3/32"︱2.381mm0.670.15
SFR1open1/18"︱1.411mm3/16"︱4.763mm0.0781"︱1.984mm160.15
SFR1ZZShields1/18"︱1.411mm3/16"︱4.763mm0.1094"︱2.779mm160.19
SFR1-4open5/64"︱1.984mm1/4"︱6.35mm3/32"︱2.381mm170.4
SFR1-4ZZShields5/64"︱1.984mm1/4"︱6.35mm0.1406"︱3.571mm170.53
SFR1-4 2RSRubber seal5/64"︱1.984mm1/4"︱6.35mm0.1406"︱3.571mm170.67
SFR1-5open3/32"︱2.381mm5/16"︱7.938mm0.1094"︱2.779mm1.58860.67
SFR1-5ZZShields3/32"︱2.381mm5/16"︱7.938mm0.1406"︱3.571mm1.58861.25
SFR1-5 2RSRubber seal3/32"︱2.381mm5/16"︱7.938mm0.1406"︱3.571mm1.58861.25
SFR133open3/32"︱2.381mm3/16"︱4.762mm0.0625"︱1.588mm0.870.13
SFR133ZZShields3/32"︱2.381mm3/16"︱4.762mm3/32"︱2.381mm0.870.21
SFR133-2RSRubber seal3/32"︱2.381mm3/16"︱4.762mm3/32"︱2.381mm0.870.21
SFR144open1/8"︱3.175mm1/4"︱6.35mm3/32"︱2.381mm170.33
SFR144ZZShields1/8"︱3.175mm1/4"︱6.35mm0.1094"︱2.779mm170.48
SFR144-2RSRubber seal1/8"︱3.175mm1/4"︱6.35mm0.1094"︱2.779mm170.48
SFR2open1/8"︱3.175mm3/8"︱9.525mm5/32"︱3.967mm1.58871.2
SFR2ZZShields1/8"︱3.175mm3/8"︱9.525mm5/32"︱3.967mm1.58871.53
SFR2-2RSRubber seal1/8"︱3.175mm3/8"︱9.525mm5/32"︱3.967mm1.58871.53
SFR2-5open1/8"︱3.175mm5/16"︱7.938mm0.1094"︱2.779mm1.58860.57
SFR2-5ZZShields1/8"︱3.175mm5/16"︱7.938mm0.1406"︱3.571mm1.58860.84
SFR2-5-2RSRubber seal1/8"︱3.175mm5/16"︱7.938mm0.1406"︱3.571mm1.58860.84
SFR2-6open1/8"︱3.175mm3/8"︱9.525mm0.1094"︱2.779mm1.58871.05
SFR2-6ZZShields1/8"︱3.175mm3/8"︱9.525mm0.1406"︱3.571mm1.58871.35
SFR2-6-2RSRubber seal1/8"︱3.175mm3/8"︱9.525mm0.1406"︱3.571mm1.58871.35
SFR155open5/32"︱3.969mm5/16"︱7.938mm0.1094"︱2.779mm1100.56
SFR155ZZShields5/32"︱3.969mm5/16"︱7.938mm1/8"︱3.175mm1100.72
SFR155-2RSRubber seal5/32"︱3.969mm5/16"︱7.938mm1/8"︱3.175mm1100.72
SFR156open3/16"︱4.762mm5/16"︱7.938mm0.1094"︱2.779mm1100.47
SFR156ZZShields3/16"︱4.762mm5/16"︱7.938mm1/8"︱3.175mm1100.56
SFR156-2RSRubber seal3/16"︱4.762mm5/16"︱7.938mm1/8"︱3.175mm1100.56
SFR166open3/16"︱4.762mm3/8"︱9.525mm1/8"︱3.175mm1.58880.9
SFR166ZZShields3/16"︱4.762mm3/8"︱9.525mm1/8"︱3.175mm1.58880.97
SFR166-2RSRubber seal3/16"︱4.762mm3/8"︱9.525mm1/8"︱3.175mm1.58880.97
SFR3open3/16"︱4.762mm1/2"︱12.7mm5/32"︱3.967mm2.38172.5
SFR3ZZShields3/16"︱4.762mm1/2"︱12.7mm0.1960"︱4.978mm2.38173.24
SFR3-2RSRubber seal3/16"︱4.762mm1/2"︱12.7mm0.1960"︱4.978mm2.38173.24
SFR168open1/4"︱6.35mm3/8"︱9.525mm1/8"︱3.175mm1110.66
SFR168ZZShields1/4"︱6.35mm3/8"︱9.525mm1/8"︱3.175mm1110.73
SFR168-2RSRubber seal1/4"︱6.35mm3/8"︱9.525mm1/8"︱3.175mm1110.73
SFR188open1/4"︱6.35mm1/2"︱12.7mm1/8"︱3.175mm281.71
SFR188ZZShields1/4"︱6.35mm1/2"︱12.7mm3/16"︱4.762mm282.54
SFR188-2RSRubber seal1/4"︱6.35mm1/2"︱12.7mm3/16"︱4.762mm282.54
SFR4open1/4"︱6.35mm5/8"︱15.8750.1960"︱4.978mm2.38184.82
SFR4ZZShields1/4"︱6.35mm5/8"︱15.8750.1960"︱4.978mm2.38184.9
SFR4-2RSRubber seal1/4"︱6.35mm5/8"︱15.8750.1960"︱4.978mm2.38184.9
SFR1810open5/16"︱7.938mm1/2"︱12.7mm5/32"︱3.967mm1.2121.54
SFR1810ZZShields5/16"︱7.938mm1/2"︱12.7mm5/32"︱3.967mm1.2121.72
SFR1810-2RSRubber seal5/16"︱7.938mm1/2"︱12.7mm5/32"︱3.967mm1.2121.72
SFR6open3/8"︱9.525mm7/8"︱22.2250.2188"︱5.5583.9779.71
SFR6ZZShields3/8"︱9.525mm7/8"︱22.2250.2812"︱7.142mm3.97712.39
SFR6-2RSRubber seal3/8"︱9.525mm7/8"︱22.2250.2812"︱7.142mm3.97712.39
SFR8open1/2"︱12.7mm1 1/8"︱34.925mm1/4"︱6.35mm4.762824
SFR8ZZShields1/2"︱12.7mm1 1/8"︱34.925mm5/16"︱7.938mm4.762825.6
SFR8-2RSRubber seal1/2"︱12.7mm1 1/8"︱34.925mm5/16"︱7.938mm4.762825.6