Yokomo BB-1140P Pure Evolution SPEC Racing Motor Bearing (4x11x4mm)  [BB-1140P]

Motor bearing for R/C racing (4x11x4mm)

This is a 4x11x4mm metal racing motor bearing intended for R/C electric motor applications. The BB-1140P from Yokomo's Pure Evolution line is presented as a direct replacement-sized bearing for motors that accept the 4x11x4mm form factor, serving the basic role of reducing rotational friction and supporting the motor shaft during high-RPM operation.

Installation notes: confirm the bearing inner and outer dimensions match your motor housing and shaft before removal. When replacing, keep bearings aligned with the shaft and motor endbell to avoid scoring the shaft or seating the bearing off-axis. After installation, check that the rotor spins freely without wobble or binding.

Tuning and maintenance: this bearing functions as a low-friction support that can influence heat generation and bearing life under load. Regular inspection for roughness, play, or discoloration is recommended; replace bearings showing wear. Avoid exposing bearings to moisture and grit during track sessions to prolong service life.