Set of 2 x CarbonBird™ Motor bearings. NMB brand - OEM replacement part - Fits the 775kv 1220kv 1175kv series motors.  

Also fits the bell side of the newer ribbed red/black CarbonBird ; post July 2013 Series motors 888kv ; 775kv ; 1175kv.

Features

High quality NMB USA bearing (these are not comparable to cheapo generic Chinese bearings)

size - fits the 3.17mm 1/8" shaft - 7.8mm Od - 3.5mm depth

Important Notes

• requires oil - one drop on installation - 1 drop every 5 hours running - wipe away excess.
• Bearings are sometimes mistaken to be faulty when the issue is a BENT SHAFT from crash or pilot assymetrical tool forces on the collet, which bends the shaft or collet or both - be sure to check trueness of the shaft if bearing replacement does not have an immediate effect of reducing motor noise.
• never expose to moisture or Loctite - do not try to install with any kind of Loctite - High risk! - Loctite entering any bearing will permanently damage it!
• can be damaged by metal hammer forces on the side - always use a plastic mallet - and Aluminium tap  - to remove old bearings - motor must be apart - hold the stator section by hand - NEVER in a vice - strike with a plastic mallet - nylon punch
• for full motor care  - see motor care page - CarbonBird motors 
• can be damaged in minutes if exposed to high hardness particles - micro-size abrasive sand/dust particles - choose your take off and landing zones carefully !  We recommend carry a large mat and using that as a LZ
• put a small circumference of industrial grease in the outer edge  of the stator,  then push bearing in - don't put grease into the bearing itself - bearing runs on auto oil 20W50 - this vicosity works very well - also later the bearing can be changed easily if grease is used - we don't recommend loctite go anywhere near bearings
• Set the pressure of the shaft correctly - bearings are held in under axial compression run smooth and silent if the axial pressure of the delrin washer (against the distance to the grub screw)  is correct ; if the shaft depth-to-grub-screw is too tight the engine will not spin freely - if the pressure is too loose and the engine bell has free play the engine will vibrate against the cogging forces of the magnets