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Inch Extended

Miniature bearings are sometimes referred to as instrument bearings and are used in applications as varied as gyros, anemometers, flow meters, miniature gearboxes, small motors and radio controlled models. Miniature ball bearings can be open or shielded, which helps prevent dirt from entering and lubricant from leaking out, and unflanged or flanged for easier plate mounting. Some miniature ball bearing options feature extended inner rings to help fit certain locking devices when a press fit is not possible

FILTERS
  • ID
    XZBRG Inch Extended bearing dimension diagram
    0.1875" (4.7625 mm)(6)
    0.25" (6.3500 mm)(8)
    0.3125" (7.9375 mm)(9)
    0.375" (9.5250 mm)(7)
  • OD
    0.05556" (1.4112 mm)(2)
    0.07813" (1.9845 mm)(4)
    0.09375" (2.3813 mm)(8)
    0.125" (3.1750 mm)(15)
    0.15625" (3.9688 mm)(1)
  • Width
    0.0625" (1.5875 mm)(2)
    0.0937" (2.3800 mm)(6)
    0.1094" (2.7788 mm)(11)
    0.1406" (3.5712 mm)(7)
    0.1562" (3.9675 mm)(4)
  • Static Load
    0.0937" (2.3800 mm)(2)
    0.125" (3.1750 mm)(6)
    0.1406" (3.5712 mm)(11)
    0.1719" (4.3663 mm)(7)
    0.1875" (4.7625 mm)(4)
Part NumberRing MaterialODIDWidthInner Race ODInner Race WidthShield TypeDynamic Load
RW144zz 52100 Chrome Steel 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.161" (4.0894 mm) 0.1406" (3.5712 mm) Shielded 54 lbf
RW133 52100 Chrome Steel 0.1875" (4.7625 mm) 0.09375" (2.3813 mm) 0.0625" (1.5875 mm) 0.118" (2.9972 mm) 0.0937" (2.3800 mm) Open 28 lbf
SRW144zz 440C Stainless Steel 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.161" (4.0894 mm) 0.1406" (3.5712 mm) Shielded 49 lbf
RW2 52100 Chrome Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1562" (3.9675 mm) 0.2" (5.0800 mm) 0.1875" (4.7625 mm) Open 121 lbf
SRW144 440C Stainless Steel 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.0937" (2.3800 mm) 0.161" (4.0894 mm) 0.125" (3.1750 mm) Open 49 lbf
RW144 52100 Chrome Steel 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.0937" (2.3800 mm) 0.161" (4.0894 mm) 0.125" (3.1750 mm) Open 54 lbf
SRW133zz 440C Stainless Steel 0.1875" (4.7625 mm) 0.09375" (2.3813 mm) 0.0937" (2.3800 mm) 0.118" (2.9972 mm) 0.125" (3.1750 mm) Shielded 25 lbf
RW133zz 52100 Chrome Steel 0.1875" (4.7625 mm) 0.09375" (2.3813 mm) 0.0937" (2.3800 mm) 0.118" (2.9972 mm) 0.125" (3.1750 mm) Shielded 28 lbf
RW2-5zz 52100 Chrome Steel 0.3125" (7.9375 mm) 0.125" (3.1750 mm) 0.1406" (3.5712 mm) 0.173" (4.3942 mm) 0.1719" (4.3663 mm) Shielded 107 lbf
SRW2-5 440C Stainless Steel 0.3125" (7.9375 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 96 lbf
RW2-5 52100 Chrome Steel 0.3125" (7.9375 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 107 lbf
SRW2 440C Stainless Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1562" (3.9675 mm) 0.2" (5.0800 mm) 0.1875" (4.7625 mm) Open 109 lbf
SRW2-6 440C Stainless Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 110 lbf
RW2-6 52100 Chrome Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 122 lbf
SRW2-5zz 440C Stainless Steel 0.3125" (7.9375 mm) 0.125" (3.1750 mm) 0.1406" (3.5712 mm) 0.173" (4.3942 mm) 0.1719" (4.3663 mm) Shielded 96 lbf
RW2zz 52100 Chrome Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1562" (3.9675 mm) 0.2" (5.0800 mm) 0.1875" (4.7625 mm) Shielded 121 lbf
RW2-6zz 52100 Chrome Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1406" (3.5712 mm) 0.173" (4.3942 mm) 0.1719" (4.3663 mm) Shielded 122 lbf
SRW2zz 440C Stainless Steel 0.375" (9.5250 mm) 0.125" (3.1750 mm) 0.1562" (3.9675 mm) 0.2" (5.0800 mm) 0.1875" (4.7625 mm) Shielded 109 lbf
RW155 52100 Chrome Steel 0.3125" (7.9375 mm) 0.15625" (3.9688 mm) 0.1094" (2.7788 mm) 0.221" (5.6134 mm) 0.1406" (3.5712 mm) Open 69 lbf
SRW133 440C Stainless Steel 0.1875" (4.7625 mm) 0.09375" (2.3813 mm) 0.0625" (1.5875 mm) 0.118" (2.9972 mm) 0.0937" (2.3800 mm) Open 25 lbf
RW1-5 52100 Chrome Steel 0.3125" (7.9375 mm) 0.09375" (2.3813 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 106 lbf
SRW1-5 440C Stainless Steel 0.3125" (7.9375 mm) 0.09375" (2.3813 mm) 0.1094" (2.7788 mm) 0.173" (4.3942 mm) 0.1406" (3.5712 mm) Open 95 lbf
RW1-5zz 52100 Chrome Steel 0.3125" (7.9375 mm) 0.09375" (2.3813 mm) 0.1406" (3.5712 mm) 0.173" (4.3942 mm) 0.1719" (4.3663 mm) Shielded 106 lbf
SRW1-5zz 440C Stainless Steel 0.3125" (7.9375 mm) 0.09375" (2.3813 mm) 0.1406" (3.5712 mm) 0.173" (4.3942 mm) 0.1719" (4.3663 mm) Shielded 95 lbf
SRW1-4zz 440C Stainless Steel 0.25" (6.3500 mm) 0.07813" (1.9845 mm) 0.1406" (3.5712 mm) 0.122" (3.0988 mm) 0.1719" (4.3663 mm) Shielded 49 lbf
RW1-4 52100 Chrome Steel 0.25" (6.3500 mm) 0.07813" (1.9845 mm) 0.0937" (2.3800 mm) 0.122" (3.0988 mm) 0.125" (3.1750 mm) Open 54 lbf
SRW1-4 440C Stainless Steel 0.25" (6.3500 mm) 0.07813" (1.9845 mm) 0.0937" (2.3800 mm) 0.122" (3.0988 mm) 0.125" (3.1750 mm) Open 49 lbf
RW1-4zz 52100 Chrome Steel 0.25" (6.3500 mm) 0.07813" (1.9845 mm) 0.1406" (3.5712 mm) 0.122" (3.0988 mm) 0.1719" (4.3663 mm) Shielded 54 lbf
SRW1zz 440C Stainless Steel 0.1875" (4.7625 mm) 0.05556" (1.4112 mm) 0.1094" (2.7788 mm) 0.093" (2.3622 mm) 0.1406" (3.5712 mm) Shielded 40 lbf
RW1zz 52100 Chrome Steel 0.1875" (4.7625 mm) 0.05556" (1.4112 mm) 0.1094" (2.7788 mm) 0.093" (2.3622 mm) 0.1406" (3.5712 mm) Shielded 44 lbf
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