INCH-POUND MS27645E
20 January 1998
SUPERSEDING MS27645D
5 December 1994
MILITARY SPECIFICATION SHEET
BEARING, BALL, AIRFRAME, ANTI-FRICTION, SELF-ALIGNING, LIGHT AND HEAVY DUTY
This Specification is approved for use by all Departments and
Agencies of the Department of Defense.
The requirements for acquiring the product described herein shall consist of this specification sheet and the issue of the following specification listed in that issue of the Department of Index of Specifications and Standards (DODISS) specified in the solicitation: MIL-B-7949.
TABLE I. DIMENSIONS AND LOADS
MS DASH NO. |
Ø B |
Ø D |
W |
H |
Ø A |
E |
C |
RADIAL LIMIT LOAD RATING LBS |
THRUST LIMIT LOAD RATING LBS |
6/ 5/ RADIAL LOAD RATING (LBS) FOR AVERAGE LIFE OF 10,000 COMPLETE 90 CYCLES |
AXIAL INTERNAL CLEARANCE (MAX) |
WEIGHT POUNDS (APPROX) |
MAXIMUM STARTING TORQUE (INCH-0Z) |
MINIMUM TORQUE TO DISLODGE SEAL (IN-LB) |
|
2/ BORE +.0000 -.0005 |
OUTSIDE DIAMETER 1/ 2/ +.0000 -.0005 |
WIDTH INNER RING 1/ +.000 -.005 |
WIDTH OUTER RING 1/ +.000 -.005 |
SHOULDER DIAMETER INNER RING (APPROX) |
4/ INNER RING CORNER CHAMFER |
3/ OUTER RING CORNER CHAMFER |
|||||||||
+.015 -.000 |
CASE I |
CASE II |
|||||||||||||
-3A |
.1900 |
.6250 |
.245 |
.203 |
.253 |
.005 |
.016 |
550 |
100 |
550 |
480 |
.023 |
.01 |
1 |
4 |
-4A |
.2500 |
.7500 |
.281 |
.219 |
.321 |
900 |
200 |
900 |
770 |
.025 |
1 |
6 |
|||
-5A |
.3125 |
. 8125 |
.297 |
.234 |
.381 |
.015 |
1000 |
950 |
815 |
.028 |
.02 |
2 |
10 |
||
-6A |
.3750 |
.8750 |
.313 |
.250 |
.453 |
.016 |
1120 |
1120 |
990 |
.030 |
3 |
8 |
|||
-3 |
.1900 |
.7774 |
.297 |
.270 |
.290 |
.005 |
.022 |
900 |
900 |
770 |
.023 |
.03 |
1 |
6 |
|
-4 |
.2500 |
. 9014 |
.484 |
.335 |
.390 |
.032 |
1410 |
300 |
1230 |
1230 |
.025 |
.04 |
1 |
5 |
|
-5 |
.3125 |
1.2500 |
.558 |
.375 |
.561 |
.015 |
2190 |
2190 |
1890 |
.028 |
.10 |
2 |
16 |
||
-6 |
.3750 |
1.4375 |
.620 |
.469 |
.607 |
2980 |
400 |
2980 |
2580 |
.030 |
.15 |
3 |
18 |
||
-8 |
.5000 |
1.6875 |
.620 |
.500 |
.791 |
3670 |
500 |
3670 |
3290 |
.032 |
.23 |
4 |
20 |
||
-10 |
.6250 |
1.9375 |
.813 |
.625 |
.916 |
.044 |
5320 |
600 |
4980 |
4360 |
.034 |
.37 |
6 |
25 |
|
11 Dimensions to be met after plating.
21 Out-of-round tolerances: Bore: +.0002, -.0007; outer dia: +.0005, -.0010.
31 45 chamfer or a radius giving approximately the same grip for staking the bearing in the housing will be acceptable.
41 45 chamfer or a radius giving approximately the same fillet clearance will be acceptable.
51 Case I = load fixed with respect to outer ring.
Case II = load fixed with respect to inner ring.
61 These ratings are for operation up to 250 F. For operation up to 350 F, the ratings shall be reduced by 20%.
71 These bearings are internal self-aligning for 10 in either direction except MS-4A, -5A, and -6A which are self-aligning for 8 in either direction.
AMSC N1A 1 of 3 FSC 3110
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
For Parts Inquires submit RFQ to Parts Hangar, Inc.
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