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689 Bearing | AXIS 689 Miniature Ball Bearing - 9x17x4

689 Miniature Ball Bearing - 9x17x4


Product Code: 2278-BRG-689
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Description Technical Specs
This 689 Bearing is a high-precision premium miniature ball bearing made to ABEC 3 precision standards from AXIS. What sets this 689 bearing apart from others is the ABEC 3 precision standard that this bearing is made to, the grade 10-balls used, and the superb electric motor quality rating (EMQ). ABEC 3 means that the bearing itself has a micron deviation from a nominal of 20.000mm of -8 micrometers. The standard ABEC 1 precision standard that almost all ball bearings are made to today has a deviation of -10 micrometers. In simple terms, the more precision a bearing is, the better it will perform in any given application especially when pertaining to a miniature bearing. The grade 10 balls within this bearing are typically only found within ABEC 5 or higher bearings because of their more true roundness and precision. The balls within a bearing share the load capacity, so this also increases the working life versus the standard grade 25 balls used in other brands. The electric motor quality rating means that the bearing must operate at an extremely low noise level with minimal to no vibration. To achieve this, the 689 bearing features raceways that are precision honed to a superb finish.

More specifically, 689 miniature bearings are found within a broad range of industrial and scientific applications such as medical and industrial handpieces, flow meters, fuel controls, gyros, synchros, servos, motors, cryogenic coolers, pulmonary assist devices, and more. For additional information or to get a quote on a 689 miniature ball bearing contact our customer support team and we will be happy to assist you!

689 Miniature Bearing Dimensions

  • Bearing Size: 689
  • Dimension (d): 9mm
  • Dimension (D): 17mm
  • Dimension (B): 4mm
  • Dynamic Load Rating: 230 LBS
  • Static Load Rating: 130 LBS
  • Grease Limiting Speed: 36000 RPM
  • Oil Limiting Speed: 43000 RPM
  • Weight: 0.0075 LBS

About Us
Ball Bearings
    • Premium Quality Precision Ball Bearing
    • Made to ABEC 3 Precision Standards
    • Fine Hones Race Ways
    • Electric Motor Quality Rated (EMQ)
    • Uses Superior Grade-10 Bearing Balls

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