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ProTek R/C Ceramic 5x8x2.5mm Dual Sealed "Speed" Ball Bearings (2)
[PTK-MR85-RSZZ-C]

    Low Price: $11.75
ProTek R/C Ceramic 5x8x2.5mm Dual Sealed "Speed" Ball Bearings (2)
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This is a pack of two ceramic 5x8x2.5mm dual sealed "Speed" ball bearings. ProTek R/C "Speed" bearings are high performance ceramic ball bearings designed for the R/C racing enthusiast.

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 TEN-T 
  • Losi 810 
  • Losi 22 
  • Losi TEN-SCTE 
  • Losi 22SCT 
  • Losi TEN-SCTE 2.0 
  • Losi 22 2.0 
  • Hot Bodies TCX 
  • Hot Bodies R10 
  • Kyosho Ultima RT5 
  • Kyosho Ultima SC 
  • Kyosho Ultima DB 
  • Kyosho Ultima RB6 
  • Kyosho Scorpion XXL 
  • Kyosho Ultima RB5 
  • Schumacher CAT K1 
  • XRAY RX8 
  • XRAY T4 
  • Serpent S811 Cobra 
  • Serpent 966 
  • Serpent S811 Cobra T 
  • Serpent S811 Cobra GT 
  • Serpent 747 
  • Mugen Seiki MRX5 WC 
  • Team Magic E4D Drift Spec 
  • Team Magic G4D Touring (Drift Spec) 
  • Team Magic E4RSII Touring Car 
  • Team Magic G4JR Touring Car 
  • Team Magic E4D MF Pro 
  • GMade R1 
  • HoBao Hyper 10 SC 
  • Caster Racing S10B 
  • Caster Racing S10B RTR 
  • ProTek R/C Ceramic 5x8x2.5mm Dual Sealed "Speed" Ball Bearings (2)
    Click to enlarge
    This product was added to our catalog on Thursday, December 18, 2008.
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    Quantity:  Wish List! Buy Now!
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