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Scorpion HK-40xx Yellow Seal ABEC-5 Precision Motor Bearing Upgrade Set

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Product Description

High Performance ABEC-5 SCORPION HK-40 / HKIII-40 Series Yellow Seal Motor Bearing Upgrade Set


Replacement bearings to fit:

  • Scorpion HK-4020, HK-4025, HK-4035, HKIII-4020, HKIII-4025, HKIII-4035, S4035
  • HYPERION 4020 / 4025 Helicopter motors
  • GAUI X7 Motor [217350]-GM-350S.
  • GAUI X5 Stock 4020-910kv motor.
  • Quantum 41xx and 45xx series motors (examples: 4530-500 / 4120-1200)
  • Includes: (2) Special nitrile yellow seals, deep groove precision ball bearings(8x16x5)


  • Replace your stock motor bearings with these precision ABEC-5 "Yellow nitrile rubber sealed" bearings with high tolerance, and more smoothness.
  • These bearings are sealed and pre-greased for a quick drop in upgrade.
  • The special Yellow Nitrile Rubber seals keep gear dust and metal shavings out, these debris can damage bearings that are not sealed.
  • The quality nitrile rubber seals keep the bearing grease clean and contained.
  • Sealed bearings have a longer life span than regular bearings in RC helicopter applications, especially when dust and debris are present.


If it doesn't specify which ABEC rating, it's likely that's it's ABEC-1, or lower!  Most helicopter kits come standard with ABEC-1 bearings. ABEC-5 bearings are much tighter in tolerance than ABEC-1 bearings, thus providing much higher accuracy, longer life, and more smoothness.

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