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Control Bearings

MDW, MDPP, MDSP Precision Series
MS27643/MS27647 • MIL-B-7949



Bearing
Number
D
MS
27647
Dash No.
Bore
Outside Diameter
Widths
d
D
B
C
+0.0000,-.0003
+0.000,-.008
+0.0000,-.0004
+0.000,-.010
+0.0000,-0.0025
+0.000,-.064
+0.000,-.005
+0.00,-.13
in.
mm
in.
mm
in.
mm
in.
mm
MDW4K2 (1)
-4AR
0.2500
6.350
0.6250
15.875
0.5620
14.275
0.500
12.70
*MDW4K (1)
-4R
0.2500
6.350
0.7500
19.050
0.8750
22.225
0.750
19.05
*MDW4
-
0.2500
6.350
0.7500
19.050
0.8750
22.225
0.750
19.05
MDW5
-5R
0.3125
7.938
0.8750
22.225
0.9380
23.825
0.813
20.65
MDW6
-6R
0.3750
9.525
1.0625
26.988
1.1880
30.175
1.063
27.00
MDW8
-8R
0.5000
12.700
1.4375
36.512
1.5000
38.100
1.375
34.92
*MDPP3
-
0.1900
4.826
0.7774
19.746
0.4950
12.570
0.473
12.01
MDPP4
-
0.2500
6.350
0.9014
22.896
0.6200
15.750
0.491
12.47
MDPP5
-
0.3125
7.938
1.2500
31.750
0.7450
18.920
0.687
17.45
*MDPP6
-
0.3750
9.525
1.4375
36.512
0.8700
22.100
0.794
20.17
*MDPP8
-
0.5000
12.700
1.6875
42.862
0.9320
23.670
0.856
21.74
*MDPP10
-
0.6250
15.875
1.9375
49.212
0.9950
25.270
0.920
23.37
MS27643
MDSP3 (2)
-3R
0.1900
4.826
0.7774
19.746
0.5000
12.700
0.392
9.96
MDSP4 (2)
-4R
0.2500
6.350
0.9014
22.896
0.6870
17.450
0.464
11.79
MDSP5 (2)
-5R
0.3125
7.938
1.2500
31.750
0.8120
20.620
0.656
16.66
MDSP6 (2)
-6R
0.3750
9.525
1.4375
36.512
0.9370
23.800
0.750
19.05
*MDSP8 (2)
-8R
0.5000
12.700
1.6875
42.862
1.0000
25.400
0.812
20.62
*MDSP10 (2)
-10R
0.6250
15.875
1.9375
49.212
1.1250
28.580
0.937
23.80


Bearing
Number
D
MS
27647
Dash No.
d 1
r 1
r
Wt.
Radial
Limit Load
Rating
Thrust
Limit Load
Rating
Approx.
+0.015,-.000
+0.38,-.00
+0.015,-.000
+0.38,-.00
Approx.
in.
mm
in.
mm
in.
mm
lbs.
kg
lbs.
l\l
lbs.
N
MDW4K2 (1)
-4AR
0.339
8.61
0.005
0.13
0.016
0.41
0.025
0.011
1400
6200
500
2240
*MDW4K (1)
-4R
0.380
9.65
0.005
0.13
0.016
0.41
0.04
0.018
2770
12200
900
4000
*MDW4
-
0.375
9.52
0.005
0.13
0.016
0.41
0.06
0.027
3750
16600
1240
5500
MDW5
-5R
0.469
11.91
0.005
0.13
0.016
0.41
0.07
0.032
5140
22800
1600
7100
MDW6
-6R
0.573
14.55
0.005
0.13
0.016
0.41
0.12
0.054
8440
37500
2600
11600
MDW8
-8R
0.712
18.08
0.005
0.13
0.032
0.81
0.29
0.132
15520
69500
4700
20800
*MDPP3
-
0.302
7.67
0.005
0.13
0.018
0.46
0.04
0.018
2950
13200
1700
7500
MDPP4
-
0.410
10.41
0.005
0.13
0.032
0.81
0.06
0.027
5370
24000
1800
8000
MDPP5
-
0.469
11.91
0.015
0.38
0.032
0.81
0.17
0.077
11000
49000
4000
17600
*MDPP6
-
0.551
14.00
0.015
0.38
0.032
0.81
0.26
0.118
15760
69500
5300
23600
*MDPP8
-
0.735
18.67
0.015
0.38
0.044
1.12
0.38
0.172
23600
1E+05
7800
34500
*MDPP10
-
0.890
22.61
0.015
0.38
0.044
1.12
0.53
0.240
28400
1E+05
9400
41500
MS27643
MDSP3 (2)
-3R
0.304
7.72
0.005
0.13
0.022
0.56
0.04
0.018
1420
6400
200
900
MDSP4 (2)
-4R
0.430
10.92
0.005
0.13
0.032
0.81
0.06
0.027
1780
8000
300
1340
MDSP5 (2)
-5R
0.515
13.08
0.015
0.38
0.032
0.81
0.16
0.073
3740
16600
600
2650
MDSP6 (2)
-6R
0.564
14.33
0.015
0.38
0.032
0.81
0.24
0.109
5100
22800
800
3550
*MDSP8 (2)
-8R
0.775
19.68
0.015
0.38
0.044
1.12
0.36
0.163
7120
31500
1000
4400
*MDSP10 (2)
-10R
0.869
22.07
0.015
0.38
0.044
1.12
0.53
0.240
9000
40000
1300
5850


  • + Double row.
  • + Equipped with Teflon seals.
  • + Exposed surfaces except bore, cap, and seals are cadmium plated.
  • + Prelubricated.
  • (1) Retainer type.
    (2) These bearings are self-aligning for 10° in either direction
  • Note: These bearings should not be used as track rollers, cam follower rolls, and the like.

     

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