Bearing Data Specifications
Bearings Used in Aircraft Control Pulleys
ABMA
Bearing
Number |
Military
Standard
Number |
A
Bore
+.0000
-.0005 |
B
OD
+.0000
-.0005 |
C
Width
Inner Race
(I.R.)
+.000
-.005 |
D
Width
Outer Race
(O.R.)
+.000
-.005 |
E
Approx.
Shoulder
Dia.
(I.R.) |
| KP3K |
MS21443-3B |
.1900 |
.7774 |
.297 |
.270 |
.332 |
| KP3AK |
MS21443-3A |
.1900 |
.6250 |
.297 |
.234 |
.297 |
| KP4K |
MS21443-4C |
.2500 |
.9014 |
.484 |
.335 |
.390 |
| KP6 |
MS27640-6 |
.3750 |
1.4375 |
.620 |
.469 |
.591 |
| P4K |
MS21443-4B |
.2500 |
.8750 |
.438 |
.375 |
.423 |
| W4AK |
MS21443-4A |
.2500 |
.7500 |
.438 |
.312 |
.372 |
| P5K |
MS21443-5A |
.3125 |
.8750 |
.625 |
.375 |
.490 |
| PD5K |
MS21443-5B |
.3125 |
.9375 |
.625 |
.563 |
.490 |
| P8 |
MS21443-8 |
.5000 |
1.6875 |
.750 |
.563 |
.768 |
| P10K |
MS21443-10 |
.6250 |
1.1875 |
.438 |
.375 |
.769 |
Notes:
Dimensions in inches unless otherwise specified.
Plating - Except for bore, all exposed surfaces are cadmium plated in accordance with latest specification requirements.
Lubrication - MIL-PRF-81322 or MIL-PRF-23827. All bearings shall be packed with grease conforming to MIL-PRF-81322 unless otherwise specified. If MIL-PRF-23827 is required, add the letter "G" after the MS21443 dash number. MIL-PRF-23827 shall not be used for operation exceeding 250°F.
SAE Aerospace Standards (AS21443 and AS27640) adopted the original military standards and specification. Military Standard callout numbers have been retained for part identification.
Disclaimer: The information presented is believed to be correct as of the date of publication and is subject to change without notice. It is not intended to substitute original drawings, standards and specification documents.
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