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Commutator-end bearings are vital components in many automotive electric motors, playing a crucial role in ensuring smooth operation and longevity. Selecting the correct bearing is essential for maintaining performance and preventing premature wear or failure of the motor.
Outer Dia (IN): 1.0236" / Inner Dia (IN): 0.3937" / Width (IN): 0.3937
The superior roller end/flange contact virtually eliminates temperature peaks during start-up. Because friction, heat and wear during initial start-up is minimized, special running-in procedures are not necessary.
Thanks to their specific geometry and internal load distribution, all tapered roller bearings can handle combined axial and radial loads. The contact angle of their raceways converges on a common point on the bearing axis, and that angle can be selected...
Our expertise in bearing design, tribology, metallurgy, lubrication and manufacturing have come together to create SKF Explorer class bearings. A new standard of excellence in design, performance and precision manufacturing – one that is still unmatched...
With SKF you’ll get the right support and the right parts, no matter where your application is based. We have 17 000 distribution locations in over 130 countries around the globe. So we’ll get the part to you, no matter what. With SKF you can be...
Fits Commutator End of vehicles in image gallery fitment chart
Exceptional Quality and Performance: This OE replacement alternator bearing is designed to meet, if not exceed, the performance and quality standards of the original equipment installed on your vehicle. Experience the same high-level performance as your...
Direct Replacement, No Fuss: This OE replacement alternator bearing is meticulously designed for your specific vehicle's make and model, promising a direct fit. Installation is as straightforward as it gets - no fuss, no complications. Experience a...
Perfect Compatibility: Compatibility is key. Make sure to check our product specifications (in image gallery) to confirm that this OE replacement alternator bearing matches your vehicle's requirements. Get the perfect fit and optimal performance every...
Fits Commutator End of vehicles in image gallery fitment chart
Exceptional Quality and Performance: This OE replacement alternator bearing is designed to meet, if not exceed, the performance and quality standards of the original equipment installed on your vehicle. Experience the same high-level performance as your...
Direct Replacement, No Fuss: This OE replacement alternator bearing is meticulously designed for your specific vehicle's make and model, promising a direct fit. Installation is as straightforward as it gets - no fuss, no complications. Experience a...
Perfect Compatibility: Compatibility is key. Make sure to check our product specifications (in image gallery) to confirm that this OE replacement alternator bearing matches your vehicle's requirements. Get the perfect fit and optimal performance every...
【❗Fitment (Compatibility Description):❗:】 Direct Replacement Compatible With 1963-1964 Dodge 330 Applications Using Alternator Configurations Listed; Compatible With 38, 40, 42, 55, 60, 61, 70 Amp Alternators Where Specified.
✅【 Function (Component Description):】 Designed To Support Normal Alternator/Generator Rotor Rotation By Providing A Bearing Surface At The Commutator End.
✅【 Replacement Reason (Service Description):】 Commonly Replaced When Wear, Noise, Or Excessive End Play In The Original Bearing Affects Rotor Support.
✅【 Construction and Material:】 Machined Metal Bearing Components Sized For Alternator Service With Materials Selected For Rotational Loads And Service Conditions.
✅【 Direct Replacement Design:】 Design Designed As A Direct Replacement Component For Compatible Vehicles, Matching Original Form and Specifications.
Fits Commutator End of vehicles in image gallery fitment chart
Exceptional Quality and Performance: This OE replacement alternator bearing is designed to meet, if not exceed, the performance and quality standards of the original equipment installed on your vehicle. Experience the same high-level performance as your...
Direct Replacement, No Fuss: This OE replacement alternator bearing is meticulously designed for your specific vehicle's make and model, promising a direct fit. Installation is as straightforward as it gets - no fuss, no complications. Experience a...
Perfect Compatibility: Compatibility is key. Make sure to check our product specifications (in image gallery) to confirm that this OE replacement alternator bearing matches your vehicle's requirements. Get the perfect fit and optimal performance every...
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Commutator-End Bearings
Comparing Different Bearing Types
Ball bearings generally offer lower friction and higher speed capabilities compared to sleeve bearings. They are suitable for applications where high rotational speeds are common. Sleeve bearings, often made of bronze or porous materials impregnated with lubricant, are typically more robust and can handle shock loads better. They are often found in starter motors or other high-torque applications. The choice between ball and sleeve bearings depends on the specific motor's design and operational requirements.
Frequently Asked Questions
What is a commutator-end bearing?
A commutator-end bearing is a component that supports the armature shaft at the end where the commutator is located. It ensures smooth rotation and proper alignment of the armature within the electric motor.
How do I know which bearing size I need?
Consult your vehicle's service manual for the precise specifications. Alternatively, you can measure the old bearing's inner and outer diameters and width, or seek professional advice from a mechanic.
Can I use a different type of bearing than the original?
While sometimes possible, it's generally best to replace a bearing with the same type and specifications as the original. Using an incompatible bearing may lead to reduced performance or premature failure.
What are the signs of a failing bearing?
Common signs include increased noise, such as grinding or whining, and noticeable vibration from the motor. You might also observe a decrease in motor performance.
How often should commutator-end bearings be replaced?
There is no fixed replacement interval; it depends on usage, operating conditions, and the quality of the bearing. Replacement is typically done when signs of wear or failure are detected.
What is the difference between a ball bearing and a sleeve bearing?
Ball bearings use rolling balls to reduce friction and are good for high speeds, while sleeve bearings use a sliding surface and are often more durable for heavy loads and shock.
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