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ProTek R/C Ceramic 5x13x4mm Metal Shielded "Speed" 1/8 Clutch Bearings (2)
[PTK-695ZZ-C]

    Low Price: $10.99
ProTek R/C Ceramic 5x13x4mm Metal Shielded "Speed" 1/8 Clutch Bearings (2)
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This is a pack of two ceramic 5x13x4mm metal shielded "Speed" 1/8 clutch bearings. ProTek R/C "Speed" bearings are high performance ceramic bearings designed for the R/C racing enthusiast.

These 5x13x4mm rubber sealed bearings are the standard bearing for the Team Losi 8ight inside clutch bearing. Please check the manual that came with your vehicle for the correct size if you are not certain.

Why Ceramic?
Our ProTek Ceramic Bearings are a hybrid type, featuring Chrome Steel inner and outer races, with Si3N4 silicone nitride ceramic balls. Ceramic bearings have many advantages over standard steel bearings, such as decreased weight, higher RPM capabilities, increased corrosion and wear resistance,  as well as reduced friction and vibration.  

So next time you purchase bearings, when you ask yourself "Why should I buy Ceramic?" You should be asking yourself "Why shouldn't I?"

Advantages of Ceramic:

  • High Speed: Hybrid bearings can reach a resistance level of 1,200,000dN with grease lubrication, due to reduced slip, wear extent and heat productivity.
  • Lightweight: The weight of ceramics is 60% lighter than steel, which decreases the centrifugal force and the overall bearing weight.
  • Long Service Life: The service life of hybrid bearings is 3 to 5 times longer than that of steel bearings in comparable working conditions.
  • Self Lubricating: Even when poorly lubricated or with no lubrication, ceramic bearings will continue to function longer than steel bearings under the same level of stress due to their self lubricating properties.
  • Corrosion Resistance: Hybrid bearings have excellent corrosion resistance, and will continue to function while corroded.
  • High Rigidity: The elastic ration of ceramics is 1.5 times greater than that of bearing steel, this dramatically increases the rigidity of the bearing.
  • Low Friction: Ceramic materials have a low friction force. Even under the conditions of boundary lubrication, the surfaces are extremely smooth, so its friction force is low and the rotational friction moment is low.
  • Wear Resistant: The micro-hardness of ceramics can reach a Vickers Hardness level of HV1700 kg/mm2, which dramatically increases the wear-resistance.
Note: It is important with ceramic bearings to ensure that the bearings are properly shimmed (do not shim them too tight), and that you keep them lubricated to ensure long life. Ceramic bearings run smoother with less friction than regular bearings, and should last three to four times as long. We highly recommend the use of Tri-Flow teflon based bicycle lubricant for ceramic bearings. Teflon lubricant works the best as the Teflon will impregnate the balls for longer life.

ProTek R/C is an A Main Hobbies brand.


Part Compatibility:
  • Losi 8IGHT 2.0 
  • Losi 8IGHT-T 2.0 
  • Losi 22 
  • Losi 22SCT 
  • Losi 8IGHT 3.0 
  • Losi 22 2.0 
  • Losi 8IGHT 
  • Losi 8IGHT-T 
  • Agama Racing A8 EVO 
  • Agama Racing A8T EVO 
  • Vaterra Glamis Uno 
  • Vaterra Twin Hammers 
  • ProTek R/C Ceramic 5x13x4mm Metal Shielded "Speed" 1/8 Clutch Bearings (2)
    Click to enlarge
    This product was added to our catalog on Wednesday, February 07, 2007.
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    Quantity:  Wish List! Buy Now!
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