英制微型轴承
微型轴承被称为仪器轴承。其紧凑的尺寸和卓越的性能特点使其成为许多行业的重要组成部分。它们被用于各种应用，如陀螺仪、风速计、流量计、微型齿轮箱、小型电机和无线电控制模型。
| 型号 | 密封形式 | 内径(d) | 外径(D) | 宽度(B) | 球径(mm) | 钢球数量 | 重量(g) |
| R1-4 | 开式 | 5/64″︱1.984mm | 1/4″︱6.35mm | 3/32″︱2.381mm | 1 | 7 | 0.4 |
| R1-4ZZ | 防尘盖 | 5/64″︱1.984mm | 1/4″︱6.35mm | 0.1406″︱3.571mm | 1 | 7 | 0.53 |
| R1-4 2RS | 胶盖 | 5/64″︱1.984mm | 1/4″︱6.35mm | 0.1406″︱3.571mm | 1 | 7 | 0.53 |
| R1-5 | 开式 | 3/32″︱2.381mm | 5/16″︱7.938mm | 0.1094″︱2.779mm | 1.588 | 6 | 0.6 |
| R1-5ZZ | 防尘盖 | 3/32″︱2.381mm | 5/16″︱7.938mm | 0.1406″︱3.571mm | 1.588 | 6 | 1.15 |
| R1-5 2RS | 胶盖 | 3/32″︱2.381mm | 5/16″︱7.938mm | 0.1406″︱3.571mm | 1.588 | 6 | 1.15 |
| R133 | 开式 | 3/32″︱2.381mm | 3/16″︱4.762mm | 0.0625″︱1.588mm | 0.8 | 7 | 0.1 |
| R133ZZ | 防尘盖 | 3/32″︱2.381mm | 3/16″︱4.762mm | 3/32″︱2.381mm | 0.8 | 7 | 0.15 |
| R133-2RS | 胶盖 | 3/32″︱2.381mm | 3/16″︱4.762mm | 3/32″︱2.381mm | 0.8 | 7 | 0.15 |
| R144 | 开式 | 1/8″︱3.175mm | 1/4″︱6.35mm | 3/32″︱2.381mm | 1 | 7 | 0.27 |
| R144ZZ | 防尘盖 | 1/8″︱3.175mm | 1/4″︱6.35mm | 0.1094″︱2.779mm | 1 | 7 | 0.4 |
| R144-2RS | 胶盖 | 1/8″︱3.175mm | 1/4″︱6.35mm | 0.1094″︱2.779mm | 1 | 7 | 0.4 |
| R2 | 开式 | 1/8″︱3.175mm | 3/8″︱9.525mm | 5/32″︱3.967mm | 1.588 | 7 | 1.04 |
| R2ZZ | 防尘盖 | 1/8″︱3.175mm | 3/8″︱9.525mm | 5/32″︱3.967mm | 1.588 | 7 | 1.37 |
| R2-2RS | 胶盖 | 1/8″︱3.175mm | 3/8″︱9.525mm | 5/32″︱3.967mm | 1.588 | 7 | 1.37 |
| R2-5 | 开式 | 1/8″︱3.175mm | 5/16″︱7.938mm | 0.1094″︱2.779mm | 1.588 | 6 | 0.5 |
| R2-5ZZ | 防尘盖 | 1/8″︱3.175mm | 5/16″︱7.938mm | 0.1406″︱3.571mm | 1.588 | 6 | 0.74 |
| R2-5-2RS | 胶盖 | 1/8″︱3.175mm | 5/16″︱7.938mm | 0.1406″︱3.571mm | 1.588 | 6 | 0.74 |
| R2-6 | 开式 | 1/8″︱3.175mm | 3/8″︱9.525mm | 0.1094″︱2.779mm | 1.588 | 7 | 0.96 |
| R2-6ZZ | 防尘盖 | 1/8″︱3.175mm | 3/8″︱9.525mm | 0.1406″︱3.571mm | 1.588 | 7 | 1.23 |
| R2-6-2RS | 胶盖 | 1/8″︱3.175mm | 3/8″︱9.525mm | 0.1406″︱3.571mm | 1.588 | 7 | 1.23 |
| R2A | 开式 | 1/8″︱3.175mm | 1/2″︱12.7mm | 0.1719″︱4.366mm | 1.588 | 7 | 3.3 |
| R2AZZ | 防尘盖 | 1/8″︱3.175mm | 1/2″︱12.7mm | 0.1719″︱4.366mm | 1.588 | 7 | 1.23 |
| R2A-2RS | 胶盖 | 1/8″︱3.175mm | 1/2″︱12.7mm | 0.1719″︱4.366mm | 1.588 | 7 | 1.23 |
| R155 | 开式 | 5/32″︱3.969mm | 5/16″︱7.938mm | 0.1094″︱2.779mm | 1 | 10 | 0.51 |
| R155ZZ | 防尘盖 | 5/32″︱3.969mm | 5/16″︱7.938mm | 1/8″︱3.175mm | 1 | 10 | 0.61 |
| R155-2RS | 胶盖 | 5/32″︱3.969mm | 5/16″︱7.938mm | 1/8″︱3.175mm | 1 | 10 | 0.61 |
| R156 | 开式 | 3/16″︱4.762mm | 5/16″︱7.938mm | 0.1094″︱2.779mm | 1 | 10 | 0.4 |
| R156ZZ | 防尘盖 | 3/16″︱4.762mm | 5/16″︱7.938mm | 1/8″︱3.175mm | 1 | 10 | |
| R156-2RS | 胶盖 | 3/16″︱4.762mm | 5/16″︱7.938mm | 1/8″︱3.175mm | 1 | 10 | |
| R166 | 开式 | 3/16″︱4.762mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1.588 | 8 | 0.81 |
| R166ZZ | 防尘盖 | 3/16″︱4.762mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1.588 | 8 | 0.85 |
| R166-2RS | 胶盖 | 3/16″︱4.762mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1.588 | 8 | 0.85 |
| R3 | 开式 | 3/16″︱4.762mm | 1/2″︱12.7mm | 5/32″︱3.967mm | 2.381 | 7 | 2.21 |
| R3ZZ | 防尘盖 | 3/16″︱4.762mm | 1/2″︱12.7mm | 0.1960″︱4.978mm | 2.381 | 7 | |
| R3-2RS | 胶盖 | 3/16″︱4.762mm | 1/2″︱12.7mm | 0.1960″︱4.978mm | 2.381 | 7 | |
| R3A | 开式 | 3/16″︱4.762mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 5.08 |
| R3AZZ | 防尘盖 | 3/16″︱4.762mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 5.08 |
| R3A-2RS | 胶盖 | 3/16″︱4.762mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 5.08 |
| R168 | 开式 | 1/4″︱6.35mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1 | 11 | 0.57 |
| R168ZZ | 防尘盖 | 1/4″︱6.35mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1 | 11 | 0.6 |
| R168-2RS | 胶盖 | 1/4″︱6.35mm | 3/8″︱9.525mm | 1/8″︱3.175mm | 1 | 11 | 0.6 |
| R188 | 开式 | 1/4″︱6.35mm | 1/2″︱12.7mm | 1/8″︱3.175mm | 2 | 8 | 1.6 |
| R188ZZ | 防尘盖 | 1/4″︱6.35mm | 1/2″︱12.7mm | 3/16″︱4.762mm | 2 | 8 | 2.32 |
| R188-2RS | 胶盖 | 1/4″︱6.35mm | 1/2″︱12.7mm | 3/16″︱4.762mm | 2 | 8 | 2.32 |
| R4 | 开式 | 1/4″︱6.35mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 4.46 |
| R4ZZ | 防尘盖 | 1/4″︱6.35mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 4.54 |
| R4-2RS | 胶盖 | 1/4″︱6.35mm | 5/8″︱15.875 | 0.1960″︱4.978mm | 2.381 | 8 | 4.54 |
| R4A | 开式 | 1/4″︱6.35mm | 3/4″︱19.05mm | 0.2188″︱5.558 | 3.5 | 6 | 7.48 |
| R4AZZ | 防尘盖 | 1/4″︱6.35mm | 3/4″︱19.05mm | 0.2188″︱5.558 | 3.5 | 6 | 10 |
| R4A-2RS | 胶盖 | 1/4″︱6.35mm | 3/4″︱19.05mm | 0.2188″︱5.558 | 3.5 | 6 | 10 |
| R1810 | 开式 | 5/16″︱7.938mm | 1/2″︱12.7mm | 5/32″︱3.967mm | 1.2 | 12 | 1.39 |
| R1810ZZ | 防尘盖 | 5/16″︱7.938mm | 1/2″︱12.7mm | 5/32″︱3.967mm | 1.2 | 12 | 1.57 |
| R1810-2RS | 胶盖 | 5/16″︱7.938mm | 1/2″︱12.7mm | 5/32″︱3.967mm | 1.2 | 12 | 1.57 |
| R6 | 开式 | 3/8″︱9.525mm | 7/8″︱22.225 | 0.2188″︱5.558 | 3.97 | 7 | 9.02 |
| R6ZZ | 防尘盖 | 3/8″︱9.525mm | 7/8″︱22.225 | 0.2812″︱7.142mm | 3.97 | 7 | 11.7 |
| R6-2RS | 胶盖 | 3/8″︱9.525mm | 7/8″︱22.225 | 0.2812″︱7.142mm | 3.97 | 7 | 11.7 |
| R8 | 开式 | 1/2″︱12.7mm | 1 1/8″︱34.925mm | 1/4″︱6.35mm | 4.762 | 8 | 11.6 |
| R8ZZ | 防尘盖 | 1/2″︱12.7mm | 1 1/8″︱34.925mm | 5/16″︱7.938mm | 4.762 | 8 | 24.1 |
| R8-2RS | 胶盖 | 1/2″︱12.7mm | 1 1/8″︱34.925mm | 5/16″︱7.938mm | 4.762 | 8 | 24.1 |
