Radial Full Ceramic Ball Bearings

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Full Ceramic Ball Bearings have Rings and Balls that are constructed of Ceramic material. These bearings may be better suited for certain applications better than their stainless steel counterparts – specifically in situations where there is a harsh environment where stainless steel would not survive or in situations where magnetism is of concern (ceramics are non-magnetic.) Applications such as cryopumps, medical devices, semiconductors, machine tools, turbine flow meters, food processing equipment, robotics and laboratory equipment. Ceramic materials commonly used for bearings are Silicon Nitride (Si3N4) and Zirconia Oxide (ZrO2).

Full ceramic ball bearings can continue to operate under extremely high temperatures and are capable of operating up to 1472 Deg. F. Ceramic is much lighter than steel and many bearings are 1/3 the weight of a comparable steel bearing. Full ceramic bearings are highly corrosion resistant and will stand up to most common acids, they will not corrode in exposure to water or salt water. And finally full ceramic ball bearings are non-conductive.

Full-Ceramic-Ball-Bearings
Full-Ceramic-Ball-Bearings

Radial Full Ceramic Ball Bearings are Suitable for the following applications:

  • High corrosion resistance
  • Qualify for extreme temperatures
  • Qualify for dry running conditions
  • Low weight
  • Absolutely Non-magnetic
  • Qualify for media- and starved lubrication
  • High stiffness
  • High reliability
  • Low abrasion
  • Low operating costs

Full Ceramic Bearings for Extreme Applications

Product ID (d) OD (D) Width (W) Radius (r) Static Load (lb) Dynamic Load (lb) Weight (gm)Ref
0.0937 0.1875 0.0937 0.003 6 14 0.25 View
0.125 0.25 0.1094 0.003 13 33 0.5 View
0.125 0.3125 0.1406 0.003 24 60 1 View
0.125 0.375 0.1406 0.005 24 60 1.5 View
0.125 0.375 0.1562 0.012 29 73 1.5 View
0.125 0.5 0.1719 0.012 29 73 3.3 View
0.1562 0.3125 0.125 0.003 14 33 0.75 View
0.1875 0.3125 0.125 0.003 14 33 0.5 View
0.1875 0.375 0.125 0.003 33 76 1 View
0.1875 0.5 0.196 0.012 64 148 3.25 View
0.25 0.375 0.125 0.003 17 37 0.75 View
0.25 0.5 0.1875 0.005 57 114 2.5 View
0.25 0.625 0.196 0.012 77 168 5 View
0.3125 0.5 0.1562 0.005 31 56 1.75 View
0.375 0.875 0.2812 0.016 305 575 12.5 View
0.5 1.125 0.3125 0.016 505 885 26 View
0.0937 0.1875 0.0937 0.003 6 14 0.25 View
0.125 0.25 0.1094 0.003 13 33 0.5 View
0.125 0.3125 0.1406 0.003 24 60 1 View
0.125 0.375 0.1406 0.005 24 60 1.5 View
0.125 0.375 0.1562 0.012 29 73 1.5 View
0.125 0.5 0.1719 0.012 29 73 3.3 View
0.1562 0.3125 0.125 0.003 14 33 0.75 View
0.1875 0.3125 0.125 0.003 14 33 0.5 View
0.1875 0.375 0.125 0.003 33 76 1 View
0.1875 0.5 0.196 0.012 64 148 3.25 View
0.25 0.375 0.125 0.003 17 37 0.75 View
0.25 0.5 0.1875 0.005 57 114 2.5 View
0.25 0.625 0.196 0.012 77 168 5 View
0.3125 0.5 0.1562 0.005 31 56 1.75 View
0.375 0.875 0.2812 0.016 305 575 12.5 View
0.5 1.125 0.3125 0.016 505 885 26 View

CERAMIC VS. STEEL

Item

Bearing Steel

Ceramics (SI3N4)

Characteristics of Ceramic Bearings

Density (g/m?)

7.8

3.2

Higher Speed Decreased centrifugal force Reduced Ball Skidding Lower Operating Temperature Less wear Less Friction

Heat Resistance (ºC)

180

800

Maintains stability at high temperatures

Coefficient of linear thermal expansion (1/ºC)

12.5 X 10-6

3.2 X 10-6

Minimal Ball Deformation Lower operating Temperature Stable Running Preload Reduced Contact Angle Change

Vicker’s Hardness (HV)

750

1,500

Reduced Ball/Race Contact Area Minimum Ball Deformation Less Friction More Rigid Less Wear Lower Operating Temperature

Young’s Modulus (Gpa)

206

314

Poisson’s Ratio

.30

.29

Magnetism

Ferromagnetic

Non-Magnetic

Reduced Torque in Strong Magnetic Field

Conductivity

Conductive

Non-Conductive

No Electrical Arcing Through Balls Less Wear Reduced Race Way Pitting and Fluting

Corrosion Resistance

Not Good

Excellent

Less Wear Harsh Environment Durability Longer Life