LOSA6940 6x12mm Sealed Ball Bearing

Losi LOSA6940 6×12mm Sealed Ball Bearing (4)

The LOSA6940 is a genuine Losi sealed ball bearing set used in a wide range of RC vehicles for drivetrain, wheel, and gearbox support. Each bearing measures 6×12×4mm and is rubber-sealed to help keep dirt and debris out while allowing smooth, low-friction rotation.

This part is considered a standard maintenance item and is commonly replaced when bearings become noisy, gritty, or develop play. It is used in many locations depending on the vehicle, including wheel hubs, transmissions, and differential support areas.

Official manufacturer listings confirm the set includes four sealed 6×12mm bearings and note that the part has been discontinued in several channels, meaning availability may be limited.

Features:

• Genuine Losi replacement bearing set
• 6×12×4mm size (standard RC bearing dimension)
• Rubber-sealed to reduce dirt and moisture contamination
• Improves drivetrain smoothness and efficiency
• Commonly used in wheels, gearboxes, and driveline support points
• Direct replacement maintenance part

Specifications:

• Part Number: LOSA6940
• Type: Ball Bearing Set
• Size: 6 × 12 × 4 mm
• Seal Type: Rubber sealed (2RS-style)
• Quantity: 4 bearings

Summary

This is a general-purpose RC bearing set used across many Losi platforms. It is mainly a maintenance item that keeps drivetrains running smoothly by reducing friction and replacing worn or contaminated bearings.