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B500DD/MB500DD Series

B500DD series bearings are used for airframe control. These tube-type bearings are extra light torque products.

Extra Light Torque Tube Type
Aircraft Control Bearing

  • Manufactured to AS27646 per AS7949
  • Extra light duty
  • Single row ball bearing
  • PTFE coated fiberglass seals
  • All external surfaces except bore and seals are cadmium plated
  • Pre-lubricated (see grease specifications)
  • This series is dimensionally interchangeable with the unshielded B500 series

MB500DD Series

  • Manufactured to AS21428 per SAE AS7949
  • When ordering precision parts be sure to add the “M” prefix to the standard part number
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B500dd Series
wdt_ID Part Number MS 27646- Bore d (in.) <br>+.0007 to -.0007 <br> +.0000 to -.0005 Outside Diameter D (in.)<br>+.0000 to -.0010<br>+.0000 to -.0005 Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025 Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005 Inner Land Diameter d1 (in.) Inner Ring Chamfer c1 (in.) Outer Ring Chamfer c (in.) Radial Limit Load Rating (lbs.) † Thrust Limit Load Rating (lbs.) † Footnote(**) Footnote(***)
1 B538DD -38 0.6250 1.0625 0.281 0.250 0.777 0.015 0.015 3280 1500
2 B539DD -39 0.7500 1.1875 0.281 0.250 0.895 0.015 0.015 3750 1700
3 B540DD -40 0.8750 1.3125 0.281 0.250 1.016 0.015 0.015 4220 1900
5 B541DD -41 1.0625 1.5000 0.281 0.250 1.216 0.015 0.015 5000 2200
6 B542DD -42 1.3125 1.7500 0.281 0.250 1.451 0.015 0.015 5950 2700
7 B543DD -43 1.5625 2.0000 0.281 0.250 1.702 0.015 0.015 6880 3200
8 B544DD -44 1.8125** 2.2500*** 0.281 0.250 1.970 0.015 0.015 7980 3600 +.0010 inch/-.0010 inch  +.0000 inch/-.0008 inch +.0000 inch/-.0015 inch  +.0000 inch/-.0007 inch
9 B545DD -45 2.0625** 2.6250*** 0.281 0.250 2.286 0.015 0.015 9220 4000 +.0010 inch/-.0010 inch  +.0000 inch/-.0008 inch +.0000 inch/-.0015 inch  +.0000 inch/-.0007 inch
10 B546DD -46 2.3125** 2.8750*** 0.281 0.250 2.527 0.015 0.015 10150 4400 +.0010 inch/-.0010 inch  +.0000 inch/-.0008 inch +.0000 inch/-.0015 inch  +.0000 inch/-.0007 inch
Part Number MS 27646- Bore d (in.) <br>+.0007 to -.0007 <br> +.0000 to -.0005 Outside Diameter D (in.)<br>+.0000 to -.0010<br>+.0000 to -.0005 Inner Ring Width B (in.)<br>+.000 to -.005<br>+.0000 to -.0025 Outer Ring Width C (in.)<br>+.000 to -.005<br>+.000 to -.005 Inner Land Diameter d1 (in.) Inner Ring Chamfer c1 (in.) Outer Ring Chamfer c (in.) Radial Limit Load Rating (lbs.) † Thrust Limit Load Rating (lbs.) † Footnote(**) Footnote(***)
† Refer to the Technical Info section for Bearing Life Calculations.
* Maximum shaft or housing fillet which bearing corner will clear. Notes:
  1. Do not use bearings as track rollers, cam follower rolls or for similar applications.
  2. Check with Schatz Bearing Corporation for current approval status.
  3. Contact Schatz Bearing Corporation’s Engineering Department for further technical information.
  4. Check with Schatz Bearing Corporation’s Sales Department for price and availability.
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