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Replacement and OEM Parts for Alternator Bearings
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Alternator Bearings

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Alternators, Batteries & Starters
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276 Products found

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  • OEM (Genuine) Bearing, Front

    PartNumber: 31112-5X6-J01
    OEM Bearing, Front - 31112-5X6-J01
    Product Specifications
    • Other Names: Bearings, Front Bearing
    • Item Dimensions: 1.9 x 1.9 x 0.5 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 31114-PGK-A01
    • Part Description: Bearing, Front
    More Info
    $17.06 MSRP: $24.08
    You Save: $7.02 (30%)
  • SKF Alternator Bearing - 6304-2RSJ

    SKF® Alternator Bearing

    PartNumber: 6304-2RSJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311063807
    • Part Description: Alternator Bearing
    More Info
    $34.01
  • National Generator Commutator End Bearing - 304-DD

    National® Generator Commutator End Bearing

    PartNumber: 304-DD
    Product Specifications
    • Type: A-7
    • Part Description: Generator Commutator End Bearing
    $38.12
  • OEM (Genuine) Bearing, Rear Generator

    PartNumber: 31111-PT0-003
    OEM Bearing, Rear Generator - 31111-PT0-003
    Product Specifications
    • Other Names: Bearings, Rear Bearing
    • Item Dimensions: 2.5 x 2.4 x 0.8 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 31111-PD1-004, 31111-P72-013, 31111-P72-003
    • Part Description: Bearing, Rear Generator
    More Info
    $28.07 MSRP: $39.67
    You Save: $11.60 (30%)
  • SKF Alternator Bearing - 6305-2RSJ

    SKF® Alternator Bearing

    PartNumber: 6305-2RSJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311063814
    • Part Description: Alternator Bearing
    More Info
    $27.08
  • National Generator Drive End Bearing - 305

    National® Generator Drive End Bearing

    PartNumber: 305
    Product Specifications
    • Bore: 25.000 mm
    • Design: Single Row Radial"
    • Inner Race Bore: 0.984"
    • Inner Race Radius: 0.040"
    • Inner Race Width: 17.000 mm
    • Outer Race Outside Diameter: 2.441"
    • Outer Race Radius: 1.020 mm
    • Outer Race Width: 0.669"
    • Outside Diameter: 62.000 mm
    • Series: 300
    • Type: A-1
    • Width: 0.669"
    • Part Description: Generator Drive End Bearing
    More Info
    $27.53
  • SKF Alternator Bearing - 6303-2RSJ

    SKF® Alternator Bearing

    PartNumber: 6303-2RSJ
    Product Specifications
    • Inner Diameter: 0.6693"
    • Outer Diameter: 1.8504"
    • UPC: 085311069526
    • Width: 0.5512"
    • Part Description: Alternator Bearing
    More Info
    $25.52
  • National Generator Commutator End Bearing - 303-SS

    National® Generator Commutator End Bearing

    PartNumber: 303-SS
    Product Specifications
    • Bore (Inch): 0.669
    • Bore (mm): 17.000
    • Design: Single Row Radial
    • Inner Race Bore (Inch): 0.669
    • Inner Race Bore (mm): 17.000
    • Inner Race Radius (Inch): 0.040
    • Inner Race Radius (mm): 1.020
    • Inner Race Width (Inch): 0.551
    • Inner Race Width (mm): 14.000
    • Outer Race Outside Diameter (Inch): 1.850
    • Outer Race Outside Diameter (mm): 47.000
    • Outer Race Radius (Inch): 0.040
    • Outer Race Radius (mm): 1.020
    • Outer Race Width (Inch): 0.551
    • Outer Race Width (mm): 14.000
    • Outside Diameter (Inch): 1.850
    • Outside Diameter (mm): 47.000
    • Series: 300
    • Type: A-3
    • Width (Inch): 0.551
    • Width (mm): 14.000
    • Part Description: Generator Commutator End Bearing
    More Info
    $19.56
  • OEM (Genuine) Bearings

    PartNumber: 90099-10140
    OEM Bearings - 90099-10140
    Product Specifications
    • Other Names: Rear Bearing
    • Item Dimensions: 2.5 x 2.2 x 0.8 inches
    • Item Weight: 0.40 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 90068-10140, 90068-10001
    • Part Description: Bearings
    More Info
    $26.38 MSRP: $38.01
    You Save: $11.63 (31%)
  • SKF Alternator Bearing - 6302-2RSJ

    SKF® Alternator Bearing

    PartNumber: 6302-2RSJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311063333
    • Part Description: Alternator Bearing
    More Info
    $25.45
  • National Generator Drive End Bearing - 302-SS

    National® Generator Drive End Bearing

    PartNumber: 302-SS
    Product Specifications
    • Type: A-3
    • Part Description: Generator Drive End Bearing
    $18.54
  • OEM (Genuine) Bearings

    PartNumber: 90099-10192
    OEM Bearings - 90099-10192
    Product Specifications
    • Other Names: Front Bearing
    • Item Dimensions: 2.9 x 2.3 x 0.9 inches
    • Item Weight: 0.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 90068-10002
    • Part Description: Bearings
    More Info
    $17.82 MSRP: $25.65
    You Save: $7.83 (31%)
  • SKF Alternator Bearing - 6306-2RSJ

    SKF® Alternator Bearing

    PartNumber: 6306-2RSJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311063357
    • Part Description: Alternator Bearing
    More Info
    $24.94
  • National Generator Commutator End Bearing - 204-FF

    National® Generator Commutator End Bearing

    PartNumber: 204-FF
    Product Specifications
    • Type: A-9
    • Part Description: Generator Commutator End Bearing
    $15.10
  • OEM (Genuine) Bearings

    PartNumber: 90068-10142
    OEM Bearings - 90068-10142
    Product Specifications
    • Other Names: Bearing, Front Bearing
    • Item Dimensions: 2.0 x 0.6 x 2.1 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 90099-10142
    • Part Description: Bearings
    More Info
    $24.22 MSRP: $34.90
    You Save: $10.68 (31%)
  • SKF Alternator Bearing - 6305-J

    SKF® Alternator Bearing

    PartNumber: 6305-J
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 826732169170
    • Part Description: Alternator Bearing
    More Info
    $22.41
  • National Generator Commutator End Bearing - 201-CC

    National® Generator Commutator End Bearing

    PartNumber: 201-CC
    Product Specifications
    • Bore: 0.472"
    • Inner Race Bore: 0.472"
    • Inner Race Radius: 0.024"
    • Inner Race Width: 0.394"
    • Outer Race Outside Diameter: 1.260"
    • Outer Race Radius: 0.024"
    • Outer Race Width: 0.394"
    • Outside Diameter (In): 1.260"
    • Quantity: 1 per Pack
    • Width: 0.394"
    • Part Description: Generator Commutator End Bearing
    More Info
    $14.58
  • OEM (Genuine) Bearings

    PartNumber: 90068-10033
    OEM Bearings - 90068-10033
    Product Specifications
    • Other Names: Front Bearing
    • Item Dimensions: 13.3 x 11.6 x 2.0 inches
    • Item Weight: 0.80 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 90099-10223
    • Part Description: Bearings
    More Info
    $16.69 MSRP: $24.02
    You Save: $7.33 (31%)
  • National Generator Commutator End Bearing - 200-CC

    National® Generator Commutator End Bearing

    PartNumber: 200-CC
    Product Specifications
    • Bore (Inch): 0.394
    • Bore (mm): 10.000
    • Design: Single Row Radial
    • Feature 4: Industry leading coverage
    • Inner Race Bore (Inch): 0.394
    • Inner Race Bore (mm): 10.000
    • Inner Race Radius (Inch): 0.039
    • Inner Race Radius (mm): 1.000
    • Inner Race Width (Inch): 0.354
    • Inner Race Width (mm): 9.000
    • Outer Race Outside Diameter (Inch): 1.181
    • Outer Race Outside Diameter (mm): 30.000
    • Outer Race Radius (Inch): 0.039
    • Outer Race Radius (mm): 1.000
    • Outer Race Width (Inch): 0.354
    • Outer Race Width (mm): 9.000
    • Outside Diameter (Inch): 1.181
    • Outside Diameter (mm): 30.000
    • Series: 200
    • Type: A-5
    • Width (Inch): 0.354
    • Width (mm): 9.000
    • Part Description: Generator Commutator End Bearing
    More Info
    $15.94
  • OEM (Genuine) Bearings

    PartNumber: 90099-10178
    OEM Bearings - 90099-10178
    Product Specifications
    • Item Dimensions: 2.8 x 2.3 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Part Description: Bearings
    More Info
    $89.37 MSRP: $129.84
    You Save: $40.47 (32%)
  • SKF Generator Commutator End Bearing - 6303-J

    SKF® Generator Commutator End Bearing

    PartNumber: 6303-J
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311069519
    • Part Description: Generator Commutator End Bearing
    More Info
    $20.28
  • National Generator Commutator End Bearing - 202-FF

    National® Generator Commutator End Bearing

    PartNumber: 202-FF
    Product Specifications
    • Type: A-9
    • Part Description: Generator Commutator End Bearing
    $13.95
  • OEM (Genuine) Regulator

    PartNumber: 27700-70030
    OEM Regulator - 27700-70030
    Product Specifications
    • Other Names: Voltage Regulator
    • Item Dimensions: 5.1 x 3.6 x 2.4 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 27700-63021
    • Part Description: Regulator
    More Info
    $227.11 MSRP: $329.95
    You Save: $102.84 (32%)
  • SKF Alternator Bearing - 6202-ZJ

    SKF® Alternator Bearing

    PartNumber: 6202-ZJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311069335
    • Part Description: Alternator Bearing
    More Info
    $15.38
  • National Generator Commutator End Bearing - 201-SS

    National® Generator Commutator End Bearing

    PartNumber: 201-SS
    Product Specifications
    • Type: A-3
    • Part Description: Generator Commutator End Bearing
    $13.94
  • OEM (Genuine) Bearings

    PartNumber: 90068-10222
    OEM Bearings - 90068-10222
    Product Specifications
    • Other Names: Rear Bearing
    • Item Dimensions: 2.5 x 2.1 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Bearings
    More Info
    $19.38 MSRP: $27.90
    You Save: $8.52 (31%)
  • SKF Alternator Bearing - 6201-ZJ

    SKF® Alternator Bearing

    PartNumber: 6201-ZJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311069311
    • Part Description: Alternator Bearing
    More Info
    $15.97
  • National Generator Commutator End Bearing - 202-SS

    National® Generator Commutator End Bearing

    PartNumber: 202-SS
    Product Specifications
    • Bore (Inch): 0.591
    • Bore (mm): 15.000
    • Design: Single Row Radial
    • Inner Race Bore (Inch): 0.591
    • Inner Race Bore (mm): 15.000
    • Inner Race Radius (Inch): 0.024
    • Inner Race Radius (mm): 0.610
    • Inner Race Width (Inch): 0.433
    • Inner Race Width (mm): 11.000
    • Outer Race Outside Diameter (Inch): 1.378
    • Outer Race Outside Diameter (mm): 35.000
    • Outer Race Radius (Inch): 0.024
    • Outer Race Radius (mm): 0.610
    • Outer Race Width (Inch): 0.433
    • Outer Race Width (mm): 11.000
    • Outside Diameter (Inch): 1.378
    • Outside Diameter (mm): 35.000
    • Series: 200
    • Type: A-3
    • Width (Inch): 0.433
    • Width (mm): 11.000
    • Part Description: Generator Commutator End Bearing
    More Info
    $13.04
  • OEM (Genuine) Grooved Ball Bearing

    PartNumber: 12-31-1-739-203
    OEM Grooved Ball Bearing - 12-31-1-739-203
    Product Specifications
    • Other Names: Bearings, Rear Bearing
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Grooved Ball Bearing
    More Info
    $16.05 MSRP: $23.07
    You Save: $7.02 (31%)
  • SKF Generator Drive End Bearing - 6204-2RSJ

    SKF® Generator Drive End Bearing

    PartNumber: 6204-2RSJ
    Product Specifications
    • Quantity Per Application: 1
    • UPC: 085311062633
    • Part Description: Generator Drive End Bearing
    More Info
    $15.88
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About Alternator Bearings

The alternator bearing is important because it ensures that the rotor's shaft gets all the energy possible from the pulley. The transfer of energy is more sufficient when there is less friction.

Alternator bearing function

The alternator bearing has the job of making the alternator turn properly to produce electricity. The electricity is then transferred to the battery, and the electrical power is used in systems such as air conditioning, lighting, and radio. Other systems are powered too but if the alternator bearing goes bad, the electricity won't be transferred to the battery.

Common problems with a bad alternator bearing

An alternator bearing can go bad and once it does you will have a dead battery and a broken alternator.