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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
    0.15625" (3.9688 mm)(4)
    0.1875" (4.7625 mm)(2)
    0.3125" (7.9375 mm)(7)
    0.375" (9.5250 mm)(5)
    0.5" (12.7000 mm)(11)
    0.625" (15.8750 mm)(1)
  • OD
    0.04688" (1.1908 mm)(4)
    0.05556" (1.4112 mm)(2)
    0.125" (3.1750 mm)(1)
    0.15625" (3.9688 mm)(3)
    0.1875" (4.7625 mm)(12)
    0.25" (6.3500 mm)(4)
    0.3125" (7.9375 mm)(4)
  • Width
    0.0625" (1.5875 mm)(2)
    0.0781" (1.9837 mm)(2)
    0.0937" (2.3800 mm)(2)
    0.1094" (2.7788 mm)(3)
    0.125" (3.1750 mm)(10)
    0.1406" (3.5712 mm)(1)
    0.1562" (3.9675 mm)(6)
    0.1875" (4.7625 mm)(1)
    0.196" (4.9784 mm)(3)
  • Static Load
    0.0937" (2.3800 mm)(2)
    0.1094" (2.7788 mm)(2)
    0.1249" (3.1725 mm)(2)
    0.1406" (3.5712 mm)(3)
    0.1562" (3.9675 mm)(10)
    0.1719" (4.3663 mm)(1)
    0.1875" (4.7625 mm)(6)
    0.2188" (5.5575 mm)(1)
    0.2273" (5.7734 mm)(3)
Part NumberRing MaterialODIDWidthInner Race ODInner Race WidthShield TypeDynamic Load
SRW1 440C Stainless Steel 0.1875" (4.7625 mm) 0.05556" (1.4112 mm) 0.0781" (1.9837 mm) 0.093" (2.3622 mm) 0.1094" (2.7788 mm) Open 40 lbf
RW1 52100 Chrome Steel 0.1875" (4.7625 mm) 0.05556" (1.4112 mm) 0.0781" (1.9837 mm) 0.093" (2.3622 mm) 0.1094" (2.7788 mm) Open 44 lbf
SRW0zz 440C Stainless Steel 0.15625" (3.9688 mm) 0.04688" (1.1908 mm) 0.0937" (2.3800 mm) 0.081" (2.0574 mm) 0.1249" (3.1725 mm) Shielded 19 lbf
RW0zz 52100 Chrome Steel 0.15625" (3.9688 mm) 0.04688" (1.1908 mm) 0.0937" (2.3800 mm) 0.081" (2.0574 mm) 0.1249" (3.1725 mm) Shielded 21 lbf
SRW0 440C Stainless Steel 0.15625" (3.9688 mm) 0.04688" (1.1908 mm) 0.0625" (1.5875 mm) 0.081" (2.0574 mm) 0.0937" (2.3800 mm) Open 19 lbf
RW0 52100 Chrome Steel 0.15625" (3.9688 mm) 0.04688" (1.1908 mm) 0.0625" (1.5875 mm) 0.081" (2.0574 mm) 0.0937" (2.3800 mm) Open 21 lbf
RW188zz 52100 Chrome Steel 0.5" (12.7000 mm) 0.25" (6.3500 mm) 0.1875" (4.7625 mm) 0.33" (8.3820 mm) 0.2188" (5.5575 mm) Shielded 207 lbf
SRW4zz 440C Stainless Steel 0.625" (15.8750 mm) 0.25" (6.3500 mm) 0.196" (4.9784 mm) 0.364" (9.2456 mm) 0.2273" (5.7734 mm) Shielded 255 lbf
RW1810 52100 Chrome Steel 0.5" (12.7000 mm) 0.3125" (7.9375 mm) 0.1562" (3.9675 mm) 0.362" (9.1948 mm) 0.1875" (4.7625 mm) Open 104 lbf
SRW1810 440C Stainless Steel 0.5" (12.7000 mm) 0.3125" (7.9375 mm) 0.1562" (3.9675 mm) 0.362" (9.1948 mm) 0.1875" (4.7625 mm) Open 94 lbf
RW1810zz 52100 Chrome Steel 0.5" (12.7000 mm) 0.3125" (7.9375 mm) 0.1562" (3.9675 mm) 0.362" (9.1948 mm) 0.1875" (4.7625 mm) Shielded 104 lbf
SRW1810zz 440C Stainless Steel 0.5" (12.7000 mm) 0.3125" (7.9375 mm) 0.1562" (3.9675 mm) 0.362" (9.1948 mm) 0.1875" (4.7625 mm) Shielded 94 lbf
SRW155 440C Stainless 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 62 lbf
RW155zz 52100 Chrome Steel 0.3125" (7.9375 mm) 0.15625" (3.9688 mm) 0.125" (3.1750 mm) 0.221" (5.6134 mm) 0.1562" (3.9675 mm) Shielded 69 lbf
SRW155zz 440C Stainless Steel 0.3125" (7.9375 mm) 0.15625" (3.9688 mm) 0.125" (3.1750 mm) 0.221" (5.6134 mm) 0.1562" (3.9675 mm) Shielded 62 lbf
SRW2-6zz 440C Stainless 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 110 lbf
RW156 52100 Chrome Steel 0.3125" (7.9375 mm) 0.1875" (4.7625 mm) 0.1094" (2.7788 mm) 0.221" (5.6134 mm) 0.1406" (3.5712 mm) Open 69 lbf
SRW156 440C Stainless Steel 0.3125" (7.9375 mm) 0.1875" (4.7625 mm) 0.1094" (2.7788 mm) 0.221" (5.6134 mm) 0.1406" (3.5712 mm) Open 62 lbf
RW156zz 52100 Chrome Steel 0.3125" (7.9375 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.221" (5.6134 mm) 0.1562" (3.9675 mm) Shielded 69 lbf
SRW156zz 440C Stainless Steel 0.3125" (7.9375 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.221" (5.6134 mm) 0.1562" (3.9675 mm) Shielded 62 lbf
RW166 52100 Chrome Steel 0.375" (9.5250 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.235" (5.9690 mm) 0.1562" (3.9675 mm) Open 136 lbf
SRW166 440C Stainless Steel 0.375" (9.5250 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.235" (5.9690 mm) 0.1562" (3.9675 mm) Open 122 lbf
RW166zz 52100 Chrome Steel 0.375" (9.5250 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.235" (5.9690 mm) 0.1562" (3.9675 mm) Shielded 136 lbf
SRW166zz 440C Stainless Steel 0.375" (9.5250 mm) 0.1875" (4.7625 mm) 0.125" (3.1750 mm) 0.235" (5.9690 mm) 0.1562" (3.9675 mm) Shielded 122 lbf
RW3 52100 Chrome Steel 0.5" (12.7000 mm) 0.1875" (4.7625 mm) 0.1562" (3.9675 mm) 0.276" (7.0104 mm) 0.1875" (4.7625 mm) Open 249 lbf
RW3zz 52100 Chrome Steel 0.5" (12.7000 mm) 0.1875" (4.7625 mm) 0.196" (4.9784 mm) 0.276" (7.0104 mm) 0.2273" (5.7734 mm) Shielded 249 lbf
SRW3zz 440C Stainless Steel 0.5" (12.7000 mm) 0.1875" (4.7625 mm) 0.196" (4.9784 mm) 0.276" (7.0104 mm) 0.2273" (5.7734 mm) Shielded 224 lbf
SRW3 440C Stainless Steel 0.5" (12.7000 mm) 0.1875" (4.7625 mm) 0.1562" (3.9675 mm) 0.276" (7.0104 mm) 0.1875" (4.7625 mm) Open 224 lbf
SRW188 440C Stainless Steel 0.5" (12.7000 mm) 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.33" (8.3820 mm) 0.1562" (3.9675 mm) Open 186 lbf
RW188 52100 Chrome Steel 0.5" (12.7000 mm) 0.25" (6.3500 mm) 0.125" (3.1750 mm) 0.33" (8.3820 mm) 0.1562" (3.9675 mm) Open 207 lbf
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