KP56B airframe control ball bearings drawing
  1. The dynamic load rating given is for outer race rotation. The dynamic load rating for inner race rotation is 8240 pounds.
  2. The static thrust load rating is 13700 pounds.
  3. The bore diameter tolerance is +.0000 / -.0010".
  4. The outside diameter tolerance is +.0000" / -.0010".
  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.

KP56B Airframe Control Ball Bearing

Model: KP56B

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Product Details

Bearing Type KPxxB
Bore Dia (d) 3.5000 in
Outer Dia (D) 4.4375 in
Outer Width (Bo) 0.4690 in
Inner Width (Bi) 0.5310 in
Dynamic Load Rating (Cr) 7,970 lbs
Static Load Rating (Cor) 31,200 lbs
Max. Shaft Shoulder Dia. Inner (Li) 3.8 in
Ball Qty 50
Ball Dia (Dw) 0.2500 in
Max. shaft corner radius, or 45 deg. chamfer (ch1) 0.039 in
Max. housing corner radius, or 45 deg. chamfer (ch) 0.039 in
Material 52100 Chrome steel or equivalent