Home » Bearings Catalog » Ball Bearings » Airframe Control Ball Bearings: Single and Double Row » B539DD


Category: Airframe Control Ball Bearings: Single and Double Row

  1. The dynamic load rating given is for outer race rotation. The dynamic load rating for inner race rotation is 2050 pounds.
  2. The static thrust load rating is 1700 pounds.
  3. The bore diameter tolerance is +.0007 / -.0007".
  4. The outside diameter tolerance is +.000" / -.001".
  5. The tolerance for the inner race width and the outer race width is +.000" / -.005"
  6. The load ratings listed for these bearings are determined by the formulas used specifically for airframe bearings. These ratings are not equivalent to ratings calculated from the ABMA formulas used for most antifriction bearing products.
  7. This bearing is intended for commercial applications. You must notify the AST sales department contact at the time of your inquiry if the bearing will be used in an airworthy application.
  8. The bearing has two removable seals made of woven fabric Teflon.
Attributes Values
Bearing Type BxxxDD
Bore Dia (d) 0.7500
Outer Dia (D) 1.1875
Outer Width (Bo) 0.2500
Inner Width (Bi) 0.2810
Dynamic Load Rating (Cr) 1,900
Static Load Rating (Cor) 3,750
Max. Shaft Shoulder Dia. Inner (Li) 0.9
Ball Qty 24
Ball Dia (Dw) 0.1250
Max. shaft corner radius, or 45 deg. chamfer (ch1) 0.015
Max. housing corner radius, or 45 deg. chamfer (ch) 0.015
Material 52100 Chrome steel or equivalent
Additional Information
Closures and Seals
Tolerances and Precision
Internal Clearance
Fitting and Mounting
Load and Life Calculation Information
eDrawings file (.ePRT, eASM)
The information in AST Bearings herein is provided for informational purposes only. This information should not be relied upon for design, development or other purposes.
Contact AST Bearings for the most current product information as it applies to you and for your product information.