Miniature ball bearings are a classification under ball bearings. SXD produces stainless steel inch miniature bearings in all metric sizes. The stainless steel material can be 440 (9Cr18), 420 (9Cr13), or 304 or 316 stainless steel. Compared with ordinary chrome steel inch miniature ball bearings, stainless steel inch miniature ball bearings can prevent corrosion caused by certain acids or moisture. Stainless steel inch miniature ball bearings have obvious advantages such as stable operation, low noise, low magnets, wide application range, and good anti-corrosion and rust resistance. They can be widely used in medical equipment, low-temperature engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery, and other fields.
| Bearing No. | SEAL TYPE | Bore diameter(d) | Outer diameter(D) | Width(B) | BALL SIZE(mm) | BALL QTY | weight(g) |
| SR1-4 | open | 5/64"︱1.984mm | 1/4"︱6.35mm | 3/32"︱2.381mm | 1 | 7 | 0.4 |
| SR1-4ZZ | Shields | 5/64"︱1.984mm | 1/4"︱6.35mm | 0.1406"︱3.571mm | 1 | 7 | 0.53 |
| SR1-4 2RS | Rubber seal | 5/64"︱1.984mm | 1/4"︱6.35mm | 0.1406"︱3.571mm | 1 | 7 | 0.53 |
| SR1-5 | open | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1.588 | 6 | 0.6 |
| SR1-5ZZ | Shields | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 1.15 |
| SR1-5 2RS | Rubber seal | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 1.15 |
| SR133 | open | 3/32"︱2.381mm | 3/16"︱4.762mm | 0.0625"︱1.588mm | 0.8 | 7 | 0.1 |
| SR133ZZ | Shields | 3/32"︱2.381mm | 3/16"︱4.762mm | 3/32"︱2.381mm | 0.8 | 7 | 0.15 |
| SR133-2RS | Rubber seal | 3/32"︱2.381mm | 3/16"︱4.762mm | 3/32"︱2.381mm | 0.8 | 7 | 0.15 |
| SR144 | open | 1/8"︱3.175mm | 1/4"︱6.35mm | 3/32"︱2.381mm | 1 | 7 | 0.27 |
| SR144ZZ | Shields | 1/8"︱3.175mm | 1/4"︱6.35mm | 0.1094"︱2.779mm | 1 | 7 | 0.4 |
| SR144-2RS | Rubber seal | 1/8"︱3.175mm | 1/4"︱6.35mm | 0.1094"︱2.779mm | 1 | 7 | 0.4 |
| SR2 | open | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.04 |
| SR2ZZ | Shields | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.37 |
| SR2-2RS | Rubber seal | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.37 |
| SR2-5 | open | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1.588 | 6 | 0.5 |
| SR2-5ZZ | Shields | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 0.74 |
| SR2-5-2RS | Rubber seal | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 0.74 |
| SR2-6 | open | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1094"︱2.779mm | 1.588 | 7 | 0.96 |
| SR2-6ZZ | Shields | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1406"︱3.571mm | 1.588 | 7 | 1.23 |
| SR2-6-2RS | Rubber seal | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1406"︱3.571mm | 1.588 | 7 | 1.23 |
| SR2A | open | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 3.3 |
| SR2AZZ | Shields | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 1.23 |
| SR2A-2RS | Rubber seal | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 1.23 |
| SR155 | open | 5/32"︱3.969mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1 | 10 | 0.51 |
| SR155ZZ | Shields | 5/32"︱3.969mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | 0.61 |
| SR155-2RS | Rubber seal | 5/32"︱3.969mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | 0.61 |
| SR156 | open | 3/16"︱4.762mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1 | 10 | 0.4 |
| SR156ZZ | Shields | 3/16"︱4.762mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | |
| SR156-2RS | Rubber seal | 3/16"︱4.762mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | |
| SR166 | open | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.81 |
| SR166ZZ | Shields | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.85 |
| SR166-2RS | Rubber seal | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.85 |
| SR3 | open | 3/16"︱4.762mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 2.381 | 7 | 2.21 |
| SR3ZZ | Shields | 3/16"︱4.762mm | 1/2"︱12.7mm | 0.1960"︱4.978mm | 2.381 | 7 | |
| SR3-2RS | Rubber seal | 3/16"︱4.762mm | 1/2"︱12.7mm | 0.1960"︱4.978mm | 2.381 | 7 | |
| SR3A | open | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR3AZZ | Shields | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR3A-2RS | Rubber seal | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR168 | open | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.57 |
| SR168ZZ | Shields | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.6 |
| SR168-2RS | Rubber seal | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.6 |
| SR188 | open | 1/4"︱6.35mm | 1/2"︱12.7mm | 1/8"︱3.175mm | 2 | 8 | 1.6 |
| SR188ZZ | Shields | 1/4"︱6.35mm | 1/2"︱12.7mm | 3/16"︱4.762mm | 2 | 8 | 2.32 |
| SR188-2RS | Rubber seal | 1/4"︱6.35mm | 1/2"︱12.7mm | 3/16"︱4.762mm | 2 | 8 | 2.32 |
| SR4 | open | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.46 |
| SR4ZZ | Shields | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.54 |
| SR4-2RS | Rubber seal | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.54 |
| SR4A | open | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 7.48 |
| SR4AZZ | Shields | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 10 |
| SR4A-2RS | Rubber seal | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 10 |
| SR1810 | open | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.39 |
| SR1810ZZ | Shields | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.57 |
| SR1810-2RS | Rubber seal | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.57 |
| SR6 | open | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2188"︱5.558 | 3.97 | 7 | 9.02 |
| SR6ZZ | Shields | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2812"︱7.142mm | 3.97 | 7 | 11.7 |
| SR6-2RS | Rubber seal | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2812"︱7.142mm | 3.97 | 7 | 11.7 |
| SR8 | open | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 1/4"︱6.35mm | 4.762 | 8 | 11.6 |
| SR8ZZ | Shields | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 5/16"︱7.938mm | 4.762 | 8 | 24.1 |
| SR8-2RS | Rubber seal | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 5/16"︱7.938mm | 4.762 | 8 | 24.1 |
| Bearing No. | SEAL TYPE | Bore diameter(d) | Outer diameter(D) | Width(B) | BALL SIZE(mm) | BALL QTY | weight(g) |
| SR1-4 | open | 5/64"︱1.984mm | 1/4"︱6.35mm | 3/32"︱2.381mm | 1 | 7 | 0.4 |
| SR1-4ZZ | Shields | 5/64"︱1.984mm | 1/4"︱6.35mm | 0.1406"︱3.571mm | 1 | 7 | 0.53 |
| SR1-4 2RS | Rubber seal | 5/64"︱1.984mm | 1/4"︱6.35mm | 0.1406"︱3.571mm | 1 | 7 | 0.53 |
| SR1-5 | open | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1.588 | 6 | 0.6 |
| SR1-5ZZ | Shields | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 1.15 |
| SR1-5 2RS | Rubber seal | 3/32"︱2.381mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 1.15 |
| SR133 | open | 3/32"︱2.381mm | 3/16"︱4.762mm | 0.0625"︱1.588mm | 0.8 | 7 | 0.1 |
| SR133ZZ | Shields | 3/32"︱2.381mm | 3/16"︱4.762mm | 3/32"︱2.381mm | 0.8 | 7 | 0.15 |
| SR133-2RS | Rubber seal | 3/32"︱2.381mm | 3/16"︱4.762mm | 3/32"︱2.381mm | 0.8 | 7 | 0.15 |
| SR144 | open | 1/8"︱3.175mm | 1/4"︱6.35mm | 3/32"︱2.381mm | 1 | 7 | 0.27 |
| SR144ZZ | Shields | 1/8"︱3.175mm | 1/4"︱6.35mm | 0.1094"︱2.779mm | 1 | 7 | 0.4 |
| SR144-2RS | Rubber seal | 1/8"︱3.175mm | 1/4"︱6.35mm | 0.1094"︱2.779mm | 1 | 7 | 0.4 |
| SR2 | open | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.04 |
| SR2ZZ | Shields | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.37 |
| SR2-2RS | Rubber seal | 1/8"︱3.175mm | 3/8"︱9.525mm | 5/32"︱3.967mm | 1.588 | 7 | 1.37 |
| SR2-5 | open | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1.588 | 6 | 0.5 |
| SR2-5ZZ | Shields | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 0.74 |
| SR2-5-2RS | Rubber seal | 1/8"︱3.175mm | 5/16"︱7.938mm | 0.1406"︱3.571mm | 1.588 | 6 | 0.74 |
| SR2-6 | open | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1094"︱2.779mm | 1.588 | 7 | 0.96 |
| SR2-6ZZ | Shields | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1406"︱3.571mm | 1.588 | 7 | 1.23 |
| SR2-6-2RS | Rubber seal | 1/8"︱3.175mm | 3/8"︱9.525mm | 0.1406"︱3.571mm | 1.588 | 7 | 1.23 |
| SR2A | open | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 3.3 |
| SR2AZZ | Shields | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 1.23 |
| SR2A-2RS | Rubber seal | 1/8"︱3.175mm | 1/2"︱12.7mm | 0.1719"︱4.366mm | 1.588 | 7 | 1.23 |
| SR155 | open | 5/32"︱3.969mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1 | 10 | 0.51 |
| SR155ZZ | Shields | 5/32"︱3.969mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | 0.61 |
| SR155-2RS | Rubber seal | 5/32"︱3.969mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | 0.61 |
| SR156 | open | 3/16"︱4.762mm | 5/16"︱7.938mm | 0.1094"︱2.779mm | 1 | 10 | 0.4 |
| SR156ZZ | Shields | 3/16"︱4.762mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | |
| SR156-2RS | Rubber seal | 3/16"︱4.762mm | 5/16"︱7.938mm | 1/8"︱3.175mm | 1 | 10 | |
| SR166 | open | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.81 |
| SR166ZZ | Shields | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.85 |
| SR166-2RS | Rubber seal | 3/16"︱4.762mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1.588 | 8 | 0.85 |
| SR3 | open | 3/16"︱4.762mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 2.381 | 7 | 2.21 |
| SR3ZZ | Shields | 3/16"︱4.762mm | 1/2"︱12.7mm | 0.1960"︱4.978mm | 2.381 | 7 | |
| SR3-2RS | Rubber seal | 3/16"︱4.762mm | 1/2"︱12.7mm | 0.1960"︱4.978mm | 2.381 | 7 | |
| SR3A | open | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR3AZZ | Shields | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR3A-2RS | Rubber seal | 3/16"︱4.762mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 5.08 |
| SR168 | open | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.57 |
| SR168ZZ | Shields | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.6 |
| SR168-2RS | Rubber seal | 1/4"︱6.35mm | 3/8"︱9.525mm | 1/8"︱3.175mm | 1 | 11 | 0.6 |
| SR188 | open | 1/4"︱6.35mm | 1/2"︱12.7mm | 1/8"︱3.175mm | 2 | 8 | 1.6 |
| SR188ZZ | Shields | 1/4"︱6.35mm | 1/2"︱12.7mm | 3/16"︱4.762mm | 2 | 8 | 2.32 |
| SR188-2RS | Rubber seal | 1/4"︱6.35mm | 1/2"︱12.7mm | 3/16"︱4.762mm | 2 | 8 | 2.32 |
| SR4 | open | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.46 |
| SR4ZZ | Shields | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.54 |
| SR4-2RS | Rubber seal | 1/4"︱6.35mm | 5/8"︱15.875 | 0.1960"︱4.978mm | 2.381 | 8 | 4.54 |
| SR4A | open | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 7.48 |
| SR4AZZ | Shields | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 10 |
| SR4A-2RS | Rubber seal | 1/4"︱6.35mm | 3/4"︱19.05mm | 0.2188"︱5.558 | 3.5 | 6 | 10 |
| SR1810 | open | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.39 |
| SR1810ZZ | Shields | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.57 |
| SR1810-2RS | Rubber seal | 5/16"︱7.938mm | 1/2"︱12.7mm | 5/32"︱3.967mm | 1.2 | 12 | 1.57 |
| SR6 | open | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2188"︱5.558 | 3.97 | 7 | 9.02 |
| SR6ZZ | Shields | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2812"︱7.142mm | 3.97 | 7 | 11.7 |
| SR6-2RS | Rubber seal | 3/8"︱9.525mm | 7/8"︱22.225 | 0.2812"︱7.142mm | 3.97 | 7 | 11.7 |
| SR8 | open | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 1/4"︱6.35mm | 4.762 | 8 | 11.6 |
| SR8ZZ | Shields | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 5/16"︱7.938mm | 4.762 | 8 | 24.1 |
| SR8-2RS | Rubber seal | 1/2"︱12.7mm | 1 1/8"︱34.925mm | 5/16"︱7.938mm | 4.762 | 8 | 24.1 |
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