Yokomo BB-74-2A 4x7x2.5mm Metal Ball Bearings Pair  [BB-74-2A]

Yokomo BB-74-2A 4x7x2.5mm Ball Bearing (2 pcs.)
Price:
£4.61
Brand:
Yokomo
Model:
BB-74-2A
GTIN:
0639342205141
Condition:
Brand New
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Precision Bearings for RC Drivetrains

The Yokomo BB-74-2A ball bearings are designed to restore smooth wheel and gear movement. These 4x7x2.5mm metal bearings suit a number of Yokomo chassis, offering steady support where rotational accuracy matters.

Model Compatibility and Usage

Compatible with chassis such as MRTC-BD919 and MRTC-BD10 series, the BB-74-2A is handy for replacing tired bearings or upgrading running gear. They address common friction points in the drivetrain.

Inspection and Maintenance Checklist

Inspect bearings for roughness or play and remove any grit before re-lubing. Routine checks after wet or abrasive runs will prolong service life and maintain handling consistency.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

How do I know if a bearing is causing handling issues

Feel for rough rotation on the shaft and listen for grinding noises. Noticeable play or uneven spin indicates the bearing should be removed and inspected or replaced.

Is it okay to use light oil instead of grease

Light oil reduces drag and can be useful for high-speed parts, while grease offers longer protection. Choose based on conditions and service intervals.

Any tips for pressing bearings in without damage

Apply force evenly to the outer race, use a bearing driver or appropriate socket, and avoid contacting the inner race to prevent scoring the balls or races.

Can I run these bearings dry for lower friction

Running dry may reduce short-term drag but increases wear long term. A light, appropriate lubricant balances low friction with protection against wear.

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