(!)Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment.

Ball Bearings(Load Direction:Radial)

Technical Information【BALL BEARINGS】
Ball bearings are used to reduce friction of a rotary shaft mounted on the machine. Reducing friction helps increase the machine efficiency, extend lifespan and prevent seizing and failure. Ball bearings consist of balls (rolling elements), the inner ring, the outer ring, the cage (for keeping the balls in appropriate motion), and are used for many machines requiring rotary shafts, such as motors equipped in electric tools, etc. Types of ball bearings are as follows; angular bearings which support radial and axial loads by combination of single row and double row, thrust bearings which support forces acting in the axial direction of a rotating object, and self-aligning bearings used when the inner and outer rings of a bearing are tilted. In addition to materials, sizes, basic load ratings, and allowable rotational speeds, there are a wide variety of types of shields, greases, outer ring types, etc., requiring you to select a suitable ball bearing for the application.

Type

  • Ball
  • Self-Aligning Ball
  • Angular Bearing (Single)
  • Angular Bearing (Double)
  • Thrust Bearing
Brand
Product Series
CAD
Days to Ship
Specifications
Type
Inner/Outer Ring Material
Bearing Style
Outer Ring Shape
Precision
I.D. d(Ø)
O.D. D(Ø)
Width B(mm)
Basic Dynamic Load Rating(N)
Specifications, Environment
Load Direction
Number of Raceway Ring Rows
Size Standards
Rolling Element Material
  • On Sale Till 07/03/2025

Deep Groove Ball Bearings - Standard Sizes, Single or Double Row.

  • On Sale Till 07/03/2025

Deep Groove Ball Bearings - Single Row, NSK.

  • On Sale Till 07/03/2025

Angular Contact Ball Bearings - Open, Single or Double Row, Steel or Stainless Steel.

  • On Sale Till 07/03/2025

Angular Contact Ball Bearings - With or Without Seals, Single or Double Row.

  • On Sale Till 07/03/2025

Small Deep Groove Ball Bearings - Flanged Option, Single Row.

  • On Sale Till 07/03/2025

Small Ball Bearings - Single Row.

  • On Sale Till 07/03/2025

Deep Groove Ball Bearings - Small Sizes.

    Thin Section Ball Bearing

      Deep Groove Ball Bearings - With retaining rings, rubber or steel seals, single row.

      • On Sale Till 07/03/2025

      Deep Groove Ball Bearings - Single Row, Nachi-Fujikoshi.

        Large Size Deep Groove Ball Bearings - Double Sealed, Single Row.

        • On Sale Till 07/03/2025

        Deep Groove Ball Bearings - With retaining ring option, single row, 440C stainless steel.

        • On Sale Till 07/03/2025

        Deep Groove Ball Bearings - Small, with flange, and double-sealed.

        • On Sale Till 07/03/2025

        Deep Groove Ball Bearings - Double-sealed.

        • On Sale Till 07/03/2025

        Angular Contact Ball Bearings - Double Row.

          Deep Groove Ball Bearings - Small Sizes, Stainless Steel.

            Thin Section Angular Contact Ball Bearing

            • On Sale Till 07/03/2025

            Deep Groove Ball Bearings - Small and double-sealed.

              Miniature Angular Contact Ball Bearings - Double Shielded, Single Row.

                Thin Section Ball Bearing - 440C Stainless Steel

                  Angular Contact Ball Bearings - Double Row, Selectable Orientation.

                    Deep Groove Ball Bearings - Single Row, Inch Sizes.

                    • Lead Time Reduction

                    Deep Groove Ball Bearings - With pilot flange and clamping collar.

                    • On Sale Till 07/03/2025
                    • Lead Time Reduction

                    Ball Bearings - Corrosion and High-Temperature Resistant, Double-Sealed.

                    • On Sale Till 07/03/2025

                    Deep Groove Ball Bearings - With retaining ring and double-sealed.

                    • On Sale Till 07/03/2025

                    Deep Groove Ball Bearings - Stainless Steel and Double-Sealed.

                    • On Sale Till 07/03/2025

                    Deep Groove Ball Bearings - With retaining ring and double-sealed, stainless steel.

                    • On Sale Till 07/03/2025

                    Deep Groove Ball Bearings - Small, Stainless Steel, Double-Sealed.

                    • On Sale Till 07/03/2025

                    Angular Contact Ball Bearings - Open, Single or Double Row.

                      Ball Bearing - Flanged, Single Row, Inch, Full Complement, FSRM Series

                      • On Sale Till 07/03/2025

                      Deep Groove Ball Bearings - Open.

                      • On Sale Till 07/03/2025

                      Self-Aligning Ball Bearings - Open and Double-Row.

                        Angular Contact Ball Bearings - Universal Combination.

                          Thin Section Four-Point Contact Ball Bearing

                          • Lead Time Reduction

                          Ball Bearings - Heat-Resistant Grease.

                          • Lead Time Reduction

                          Deep Groove Ball Bearings - Contact Seals, Stainless Steel.

                            Deep Groove Ball Bearings - Small and Open.

                            • On Sale Till 07/03/2025

                            Deep Groove Ball Bearings - Economical Model, Small, Double-Sealed.

                              Thin Section Four-Point Contact Ball Bearing - Sealed

                              • Lead Time Reduction

                              Deep Groove Ball Bearings - Heat-resistant.

                              • On Sale Till 07/03/2025

                              Deep Groove Ball Bearings - Small, Sealed with or without Contact.

                                Deep Groove Ball Bearings - Economical Model, with Flange and Double-Sealed.

                                  Insert Ball Bearing - Single Row, Inch, 7600 Series

                                    Insert Ball Bearing - Single Row, Inch, ER Series

                                    • On Sale Till 07/03/2025

                                    Deep Groove Ball Bearings - Sealed with or without contact.

                                    Brand

                                    NTN

                                    NSK

                                    NSK

                                    NTN

                                    NSK Micro Precision

                                    NTN

                                    SPB-USA (Ezo)

                                    RBC BEARINGS

                                    NTN

                                    Nachi-Fujikoshi

                                    SPB-USA (Ezo)

                                    SMT Bearing

                                    MISUMI

                                    MISUMI

                                    NTN

                                    SPB-USA (Ezo)

                                    RBC BEARINGS

                                    MISUMI

                                    NSK Micro Precision

                                    RBC BEARINGS

                                    MISUMI

                                    SPB-USA (Ezo)

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    NTN

                                    NICE BEARINGS

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    RBC BEARINGS

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    RBC BEARINGS

                                    MISUMI

                                    MISUMI

                                    MISUMI

                                    NICE BEARINGS

                                    NICE BEARINGS

                                    MISUMI

                                    Product Series

                                    Deep Groove Ball Bearings - Standard Sizes, Single or Double Row.

                                    Deep Groove Ball Bearings - Single Row, NSK.【1-100 Pieces Per Package】

                                    Angular Contact Ball Bearings - Open, Single or Double Row, Steel or Stainless Steel.

                                    Angular Contact Ball Bearings - With or Without Seals, Single or Double Row.

                                    Small Deep Groove Ball Bearings - Flanged Option, Single Row.

                                    Small Ball Bearings - Single Row.

                                    Deep Groove Ball Bearings - Small Sizes.

                                    Thin Section Ball Bearing

                                    Deep Groove Ball Bearings - With retaining rings, rubber or steel seals, single row.

                                    Deep Groove Ball Bearings - Single Row, Nachi-Fujikoshi.

                                    Large Size Deep Groove Ball Bearings - Double Sealed, Single Row.

                                    Deep Groove Ball Bearings - With retaining ring option, single row, 440C stainless steel.

                                    Deep Groove Ball Bearings - Small, with flange, and double-sealed.

                                    Deep Groove Ball Bearings - Double-sealed.

                                    Angular Contact Ball Bearings - Double Row.

                                    Deep Groove Ball Bearings - Small Sizes, Stainless Steel.

                                    Thin Section Angular Contact Ball Bearing

                                    Deep Groove Ball Bearings - Small and double-sealed.

                                    Miniature Angular Contact Ball Bearings - Double Shielded, Single Row.

                                    Thin Section Ball Bearing - 440C Stainless Steel

                                    Angular Contact Ball Bearings - Double Row, Selectable Orientation.

                                    Deep Groove Ball Bearings - Single Row, Inch Sizes.

                                    Deep Groove Ball Bearings - With pilot flange and clamping collar.

                                    Ball Bearings - Corrosion and High-Temperature Resistant, Double-Sealed.

                                    Deep Groove Ball Bearings - With retaining ring and double-sealed.

                                    Deep Groove Ball Bearings - Stainless Steel and Double-Sealed.

                                    Deep Groove Ball Bearings - With retaining ring and double-sealed, stainless steel.

                                    Deep Groove Ball Bearings - Small, Stainless Steel, Double-Sealed.

                                    Angular Contact Ball Bearings - Open, Single or Double Row.

                                    Ball Bearing - Flanged, Single Row, Inch, Full Complement, FSRM Series

                                    Deep Groove Ball Bearings - Open.

                                    Self-Aligning Ball Bearings - Open and Double-Row.

                                    Angular Contact Ball Bearings - Universal Combination.

                                    Thin Section Four-Point Contact Ball Bearing

                                    Ball Bearings - Heat-Resistant Grease.

                                    Deep Groove Ball Bearings - Contact Seals, Stainless Steel.

                                    Deep Groove Ball Bearings - Small and Open.

                                    Deep Groove Ball Bearings - Economical Model, Small, Double-Sealed.

                                    Thin Section Four-Point Contact Ball Bearing - Sealed

                                    Deep Groove Ball Bearings - Heat-resistant.

                                    Deep Groove Ball Bearings - Small, Sealed with or without Contact.

                                    Deep Groove Ball Bearings - Economical Model, with Flange and Double-Sealed.

                                    Insert Ball Bearing - Single Row, Inch, 7600 Series

                                    Insert Ball Bearing - Single Row, Inch, ER Series

                                    Deep Groove Ball Bearings - Sealed with or without contact.

                                    CAD
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D / 3D
                                    • 2D
                                    • 2D / 3D
                                    Days to Ship Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    8 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more Same day or more

                                    Show Stock Products

                                    8 Days or more 7 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    8 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more 8 Days or more 8 Days or more Same day or more

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more 8 Days or more Same day

                                    Show Stock Products

                                    Same day or more

                                    Show Stock Products

                                    7 Days or more 9 Days Same day or more

                                    Show Stock Products

                                    Specifications
                                                            • inCAD Components
                                                            • inCAD Components
                                                                  • inCAD Components
                                                                      • inCAD Components
                                                                        • inCAD Components
                                                                        • inCAD Components
                                                                        • inCAD Components
                                                                        • inCAD Components
                                                                        • inCAD Components
                                                                        • inCAD Components
                                                                            • inCAD Components
                                                                            • inCAD Components
                                                                            • inCAD Components
                                                                              • inCAD Components
                                                                              • inCAD Components
                                                                              • inCAD Components
                                                                                  • inCAD Components
                                                                                  • inCAD Components
                                                                                        • inCAD Components
                                                                                        TypeBallBallAngular Bearing (Single) / Angular Bearing (Double)Angular Bearing (Single) / Angular Bearing (Double)BallBallBallBallBallBallBallBallBallBallAngular Bearing (Double)BallAngular Bearing (Single)BallAngular Bearing (Single)BallAngular Bearing (Double)BallBallBallBallBallBallBallAngular Bearing (Single) / Angular Bearing (Double)BallBallSelf-Aligning BallAngular Bearing (Single)BallBallBallBallBallBallBallBallBallBallBallBall
                                                                                        Inner/Outer Ring MaterialSteel / Stainless SteelSteel / Stainless SteelSteel / Stainless SteelSteelSteel / Stainless SteelSteel / Stainless SteelSteelSteelSteelSteelSteelStainless SteelSteelSteelSteelStainless SteelSteel / Stainless SteelSteelSteel / Stainless SteelStainless SteelSteelSteel / Stainless SteelStainless SteelStainless SteelSteelStainless SteelStainless SteelStainless SteelSteelSteelSteelSteelSteelSteelStainless SteelStainless SteelSteelStainless SteelSteelStainless SteelSteelSteelSteelSteelSteel
                                                                                        Bearing StyleOpen Type / Double Shielded / Rubber Seal Type / Single ShieldedOpen Type / Double Shielded / Rubber Seal Type / Single ShieldedOpen Type / Double ShieldedOpen TypeOpen Type / Double Shielded / Rubber Seal TypeOpen Type / Double Shielded / Rubber Seal Type / Single Shielded--Double Shielded / Rubber Seal TypeOpen Type / Double Shielded / Rubber Seal Type / Single ShieldedDouble ShieldedOpen Type / Double Shielded / Rubber Seal Type / Single ShieldedDouble ShieldedDouble ShieldedOpen Type / Double Shielded / Rubber Seal Type--Double ShieldedDouble Shielded-Open TypeOpen Type / Double Shielded / Rubber Seal TypeDouble ShieldedDouble ShieldedDouble ShieldedDouble ShieldedDouble ShieldedDouble ShieldedOpen Type-Open TypeOpen TypeOpen Type-Double ShieldedRubber Seal TypeOpen TypeDouble Shielded-Double ShieldedRubber Seal TypeDouble Shielded--Rubber Seal Type
                                                                                        Outer Ring ShapeStandard / With U-Shaped GrooveStandard / With U-Shaped Groove / With Retaining Ring / FlangedStandardStandardStandard / FlangedStandard / With Retaining RingStandard / Flanged-GroovedStandardStandardStandard / With Retaining RingFlangedStandardStandardStandard / Flanged-StandardStandard-StandardStandard / FlangedStandardStandardWith Retaining RingStandardWith Retaining RingStandardStandardFlangedStandardStandardStandard-StandardStandardStandardStandard-StandardStandardFlangedGrooved-Standard
                                                                                        PrecisionClass 0 (ABEC-1) / Class 4 (ABEC-7) / Class 5Class 0 (ABEC-1) / Class 4 (ABEC-7) / Class 5Class 0 (ABEC-1) / Class 4 (ABEC-7) / Class 5Class 0 (ABEC-1) / Class 4 (ABEC-7) / Class 5Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 5Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1) / Class 2 / Class 4 (ABEC-7) / Class 5-Class 0 (ABEC-1)Class 0 (ABEC-1)Class 4 (ABEC-7)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)Class 0 (ABEC-1)--Class 0 (ABEC-1)
                                                                                        I.D. d(Ø)10 ~ 3001 ~ 4606 ~ 24010 ~ 1501 ~ 102 ~ 92 ~ 944.5 (1-3/4") ~ 1016 (40")12 ~ 3510 ~ 16010 ~ 1210 ~ 602 ~ 2510 ~ 5010 ~ 751.5 ~ 944.5 (1-3/4") ~ 1016 (40")2 ~ 82 ~ 850.8 (2") ~ 101.6 (4")10 ~ 503.175/0.1250 ~ 15.875/0.625010 ~ 206 ~ 2010 ~ 5010 ~ 5010 ~ 402 ~ 810 ~ 906.4 (1/4") ~ 19.1 (3/4")10 ~ 5010 ~ 2010 ~ 5044.5 (1-3/4") ~ 1016 (40")5 ~ 2010 ~ 403 ~ 82 ~ 850.8 (2") ~ 304.8 (12")10 ~ 303 ~ 82 ~ 812.7 (1/2") ~ 31.8 (1-1/4")16 (5/8") ~ 49.3 (1-15/16")10 ~ 50
                                                                                        O.D. D(Ø)15 ~ 4203 ~ 62017 ~ 42026 ~ 2803 ~ 195 ~ 265 ~ 3047.8 (1-7/8") ~ 1066.8 (42")32 ~ 8019 ~ 30026 ~ 2819 ~ 1105 ~ 4215 ~ 11030 ~ 1304 ~ 2647.8 (1-7/8") ~ 1066.8 (42")5 ~ 286 ~ 1947.8 (1-7/8") ~ 117.6 (4-5/8")26 ~ 909.525/0.3750 ~ 34.925/1.375022 ~ 4719 ~ 4722 ~ 9015 ~ 9022 ~ 685 ~ 2826 ~ 15017.5 (11/16") ~ 44.5 (1-3/4")15 ~ 9030 ~ 5226 ~ 8047.8 (1-7/8") ~ 1066.8 (42")13 ~ 4726 ~ 806 ~ 245 ~ 2266.8 (2-5/8") ~ 320.8 (12-5/8")22 ~ 628 ~ 245 ~ 1644.5 (1-3/4") ~ 65.3 (2-9/16")47 (1-27/32") ~ 90.2 (3-35/64")19 ~ 90
                                                                                        Width B(mm)3 ~ 781 ~ 906 ~ 808 ~ 941 ~ 61.5 ~ 81.5 ~ 104.8 (3/16")10 ~ 215 ~ 6285 ~ 272.3 ~ 94 ~ 2714.3 ~ 541.2 ~ 84.8 (3/16")2.3 ~ 93 ~ 13.644.8 (3/16")8 ~ 203.967/0.1562 ~ 8.733/0.34386 ~ 146 ~ 146 ~ 204 ~ 206 ~ 162.3 ~ 97 ~ 408.1 (5/16") ~ 16 (5/8")3 ~ 209 ~ 158 ~ 164.8 (3/16")4 ~ 148 ~ 182 ~ 82.3 ~ 7-6 ~ 164 ~ 82.3 ~ 516 (5/8") ~ 19.1 (3/4")31.8 (1-1/4") ~ 52.1 (2-3/64")5 ~ 21
                                                                                        Basic Dynamic Load Rating(N)855 ~ 35500080 ~ 530000600 ~ 4300004650 ~ 31000068 ~ 2340171 ~ 4550169 ~ 46591557 ~ 814346100 ~ 335001920 ~ 2530003860 ~ 43401920 ~ 62000169 ~ 7001850 ~ 680007150 ~ 125000112 ~ 45634271 ~ 246610169 ~ 4563470 ~ 40001557 ~ 45381300 ~ 67000631 ~ 59992700 ~ 1280052 ~ 2562700 ~ 35000680 ~ 298002700 ~ 19500143 ~ 38794750 ~ 1040001468 ~ 6895850 ~ 350005550 ~ 127005300 ~ 260001202 ~ 108235915 ~ 109003900 ~ 24800209 ~ 3333166 ~ 33332287 ~ 90971130 ~ 16500560 ~ 4000165 ~ 16104560 ~ 238436584 ~ 233541720 ~ 35000
                                                                                        Specifications, EnvironmentStandard / Dust ResistantStandardStandard / For High SpeedStandardStandardStandard / Dust ResistantStandard-StandardStandardStandardHeat Resistance / AntirustStandardStandardStandardStandard-StandardStandard-StandardStandardStandardStandard / Heat Resistance / Water Resistance / Non-magneticStandardStandardStandardStandardStandard / For High Speed-StandardStandardStandard-Standard / Heat ResistanceStandard / Dust ResistantStandardStandard-Standard / Heat ResistanceStandard / Dust ResistantStandard--Standard / Dust Resistant
                                                                                        Load DirectionRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadialRadial
                                                                                        Number of Raceway Ring RowsSingle TrackSingle Track-Single Track / Double RowSingle TrackSingle TrackSingle Track-Single TrackSingle TrackSingle TrackSingle TrackSingle TrackSingle TrackDouble RowSingle Track-Single TrackSingle Track-Double RowSingle TrackSingle TrackSingle TrackSingle TrackSingle TrackSingle TrackSingle TrackSingle Track / Double RowSingle TrackSingle TrackDouble RowSingle Track-Single TrackSingle TrackSingle TrackSingle Track-Single TrackSingle TrackSingle TrackSingle TrackSingle TrackSingle Track
                                                                                        Size StandardsMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesMetric SeriesMetric SeriesMetric SeriesInch SeriesInch SeriesMetric Series
                                                                                        Rolling Element MaterialSteel / Stainless SteelSteel / Stainless SteelSteel / Stainless Steel / CeramicsSteelSteel / Stainless SteelSteel / Stainless Steel / ChromeSteelSteelSteelSteelSteelStainless SteelSteelSteelSteelStainless SteelSteel / Stainless SteelSteelSteel / Stainless SteelStainless SteelSteelSteel / Stainless SteelStainless SteelStainless SteelSteelStainless SteelStainless SteelStainless SteelSteelSteelSteelSteelSteelSteelStainless SteelStainless SteelSteelStainless SteelSteelStainless SteelSteelSteelSteelSteelSteel

                                                                                        Loading...

                                                                                        Application example related to this category

                                                                                        Modules

                                                                                        Related Categories to Ball Bearings