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693 Full Ceramic Bearings 3X8X4 Ball Bearings


Ceramic Bearings Dimension


42 in stock


693 Full Ceramic Bearings Dimensions (3X8X4)

The 693  (3X8X4) full ceramic ball bearings can be supplied with rings and balls made from zirconia oxide (ZrO2) or silicon nitride (Si3N4) . These bearings are available as full complement (no cage) or with cages made from PEEK, PTFE. These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although. Full complement bearings can be used up to 400°C for zirconia oxide (ZrO2) and up to 800°C for silicon nitride (Si3N4)  while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below –70°C, PTFE cages are preferred. Standard radial play for full ceramic bearings is C3 but other clearances can be supplied to order.

Dimension Type Metric
Inner Dia(d) 3
Outer Dia(D) 8
Width (B1) 4


We Possible Design Modifications Below:

  • Bearing Material: Zirconia Oxide or Silicon Nitride.
  • Ball Material: Zirconia Oxide or Silicon Nitride Ceramic
  • Cage Material: PTFE, PEEK, Full Complement or Ceramic
  • Specific ABEC Rating: Abec 3 or 5
  • Seal Options: Two seals or open bearing
  • Lubrication: Grease, Oil, Dry Lubrication options
  • If you do not see a specific type of bearing on our website, please send us a quote request for custom bearings.


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