608 627 skating bearings steel balls bearings ceramic ball skateboard bearings

  • 80 - 799 Pieces
  • 800 - 4999 Pieces
  • >=5000 Pieces
Brand Name:
Outside Diameter:
7 - 22mm
Lead Time:
Quantity(Pieces) 1 - 50000 >50000
Est. Time(days) 7 Negotiable
Customized logo (Min. Order: 100 Pieces)
Customized packaging (Min. Order: 100 Pieces)


Graphic customization (Min. Order: 100 Pieces) Less
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Quick Details
Deep Groove
Applicable Industries:
Building Material Shops, Machinery Repair Shops, Construction works , Energy & Mining, Sport
Bore Size:
7 - 22 mm
Model Number:
608 627
Precision Rating:
Seals Type:
Number of Row:
Single Row
Place of Origin:
Zhejiang, China
Customizable colors
Can be customized
Neutral Packing or Custom Packaging
Quality Si3N4 Ceramic Ball
Si3N4 Ceramic Balls:
High temperature resistance is 50% lighter than steel balls
Nylon cage:
DuPont nylon cage
Seal/dust cover:
Rubber or steel seal, single side seal.
Product name:
HRC hardness Si3N4 Black ceramic skateboard bearing
Supply Ability
Supply Ability:
100000 Piece/Pieces per Week Skateboard bearing
Packaging & Delivery
Lead Time :
Quantity(Pieces) 1 - 50000 >50000
Est. Time(days) 7 To be negotiated
Product Description
Boarse -Black Si3N4 ceramic ball skate bearing professional manufacturer of skateboard bearings
skateboard bearing,ceramic skateboard bearing,skateboard bearing ceramic products description
Black 627 skating bearings, built-in steel balls, black ceramic balls, professional manufacturing ABEC-9
High precision and high performance endurance skateboard bearings
Quality Si3N4 Ceramic Ball
Si3N4 Ceramic Balls
High temperature resistance is 50% lighter than steel balls
Nylon card
DuPont nylon card
High rate lubricant
Seal/dust card
Rubber or steel seal, single side seal.
Customizable colors
Can be customized
Neutral Packing or Custom Packaging
Detailed description of hybrid ceramic bearings
Temperature resistance and high
Ceramic ball thermal expansion coefficient is small, in high temperature environment will not cause the expansion of the bearing ball because of temperature reasons, thus greatly improving the use of the entire bearing temperature, ordinary bearing temperature in 160 degrees, ceramic ball can reach more than 220 degrees.
High speed
Ceramic ball has the property of oil-free self-lubrication and small friction coefficient, so ceramic ball bearings have a high speed. According to statistics, the ceramic ball bearings have a rotating speed of more than 1.5 times that of ordinary bearings.
Long life

Ceramic balls do not add any grease, that is, even if the grease dries out, the bearing can still operate, thus avoiding premature damage caused by grease dried out in ordinary bearings.
The last point is also the most important pointinsulation, the use of ceramic ball bearings, can make the bearing between the inner and outer rings insulation, because the ceramic ball is an insulator, in the bearing between the inner and outer rings with ceramic balls, you can achieve insulation effect. The retainer, grease and seal are composed. When the rolling element is made of ceramic material, the rolling bearing is defined as a ceramic ball bearing.
Because the ceramic ball itself has self-lubricating properties, the lubrication can be used according to the requirements of the application. It can be used with or without lubricating oil. The seal can also be used with RS or ZZ. The retainer can be made of nylon or pom material, then the ferrule, Rolling elements are two indispensable elements of bearings. When these two elements are not the same material, there is a hybrid bearing. When the rolling element is made of a ceramic material, it is defined as a hybrid ceramic ball bearing (Hybrid construction ceramic ball bearing). Commonly used ceramic ball materials are zirconia (ZRO2) and silicon nitride (SI3N4); commonly used ferrule materials are bearing steel (Gcr15) and stainless steel (440, 420C) and stainless steel, as well as custom titanium alloy treatment.(Configuration options: can be built-in gcr15 steel ball, zirconia ceramic ball, silicon nitride ball, external multi-color titanium gold selection, black processing, free to choose.)
 Ceramic ball characteritics
1. Low density: Due to the low density of the ceramic sphere material, the centrifugal load is small, so that it can work at higher speeds and generate less heat.
2. Moderate modulus of elasticity: The modulus of elasticity of the ceramic sphere is higher than that of the steel rolling element, the dynamic stiffness of the bearing is increased, but the modulus of elasticity is too large, which reduces the bearing capacity of the bearing due to stress concentration.
3. Small thermal expansion coefficient: The small thermal expansion coefficient helps to reduce sensitivity to temperature changes and thus prevents seizure. For hybrid slide bearings, a wider range of operating speeds is available.
4. High compressive strength: High compressive strength is the requirement of rolling bearings to withstand high contact stress (for ceramic materials, the strength is usually determined by the modulus of rupture measured by the three-point or four-point bending test).
5. High hardness and high toughness: These two characteristics combine to obtain better surface roughness and prevent damage from external hard particles and impact.
6. Good resistance to rolling contact fatigue: This property is critical to the requirements of the bearing rolling elements.
7. Form of spalling failure: If the rolling element fails during work, it should be fatigue spalling. This effective form has a warning sign before it is stuck, which is a practical form that causes the least harm. Ceramic materials also have some special properties in some applications with high application conditions.
8. High temperature resistance and stability: It can maintain its mechanical properties stably in high temperature environment up to 800 °C.
9. Corrosion resistance: It should be resistant to oxidation and corrosion in oxidizing and corrosive environments, especially in contact areas where repeated rolling and squeezing off the surface oil film.
Slider bearing silicon nitride ceramic material and bearing steel's sexual ability
Density (Kg/m3) 3250 7800 Young's modulus (GPa) 310 210 Compressive strength (MPa) >3500
Moderate of rupture (MPa) 700-1000 Vickers hardness (GPa) 14-18 8 Toughness (MPa· m1/2) 5-8 16-20
Thermal expansion coefficient (×10-2/°K) 3 12 Thermal conductivity (W/mK) 20 30 Specific heat (J/KgK) 800 450
Use upper limit temperature (°K) 1050 400-600 Thermal shock resistance High Very high Rolling contact fatigue failure form Peeling Peeling
10. Summary:
Boarse produces high quality skateboard bearings and skating bearings provide the best skating bearings and best service for all who want.
From the beginning, boarse began producing the highest quality ceramic slide bearings for many top companies and distributors. Not only do we need to use the best materials, we also need to use the best processes and technologies. We offer our customers a wide range of skateboard bearing options. In the known bearing industry and the well-known brand of skateboard bearing industry has more than 15 years of history, no other company can handle the output with the quality of boarse bearings. We customize to your needs. Boarse bearings have been and will continue to produce and manufacture the top skateboard bearings on the market today.
From our testing of skateboard bearings and our years of experience in designing skating bearings, we know how to make the best skateboard bearings and how to customize for your brand skating bearings.
The boarse has been completely redesigned and can be skated from scratch, designed for skateboard specifications, including bearing components, lubricants, tolerances and clearances. So it rolls faster than other bearings and lasts longer
Use boarse bearings to start ordering and have the highest quality roller skate bearing of your own brand!

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