Control Bearings
B500DD Series
Extra Light
Torque Tube Type
MS27646 • MIL-B-7949

  • Extra light duty.
  • Single row, ball.
  • Teflon coated glass fabric shields.
  • Exposed surfaces except bore, cap, and shields are cadmium plated.
  • Prelubricated.
  • This series is dimensionally interchangeable with the unshielded B500 series.
B500DD Series - Extra Light - Torque Tube Type
Bearing
Number
MS
27646
Dash
No.
Bore
Outside Diameter
Widths
d
D
B
C
+0.0007,-.0007
+0.018,-.018
+0.0000,-.0010
+0.000,-.025
+0.000,-0.005
+0.00,-.13
+0.000,-.005
+0.00,-.13
in.
mm
in.
mm
in.
mm
in.
mm
B538DD
-38
0.6250
15.875
1.0625
26.988
0.281
7.14
0.25
6.35
B5390D
-39
0.7500
19.050
1.1875
30.162
0.281
7.14
0.25
6.35
B540DD
-40
0.8750
22.225
1.3125
33.338
0.281
7.14
0.25
6.35
B541DD
-41
1.0625
26.988
1.5000
38.100
0.281
7.14
0.25
6.35
B542DD
-42
1.3125
33.338
1.7500
44.450
0.281
7.14
0.25
6.35
B543DD
-43
1.5625
39.688
2.0000
50.800
0.281
7.14
0.25
6.35
B544DD
-44
1.8125 (1)
46.038 (1)
2.2500 (2)
57.150 (2)
0.281
7.14
0.25
6.35
B545DD
-45
2.0625 (1)
52.388 (1)
2.6250 (2)
66.675 (2)
0.281
7.14
0.25
6.35
B546DD
-46
2.3125 (1)
58.738 (1)
2.8750 (2)
73.025 (2)
0.281
7.14
0.25
6.35

Bearing
Number
d 1
r 1 (3)
r (3)
Wt.
Radial
Limit
Load
Rating
Thrust
Limit
Load
Rating
Approx.
Approx.
in.
mm
in.
mm
In.
mm
lbs.
kg
lbs.
N
lbs.
N
B538DD
0.777
19.74
0.015
0.38
0.015
0.38
0.03
0.014
3280
14600
1500
6700
B5390D
0.895
22.73
0.015
0.38
0.015
0.38
0.04
0.018
3750
16600
1700
7500
B540DD
1.016
25.81
0.015
0.38
0.015
0.38
0.05
0.023
4220
18600
1900
8500
B541DD
1.216
30.89
0.015
0.38
0.015
0.38
0.06
0.027
5000
22400
2200
9800
B542DD
1.451
36.86
0.015
0.38
0.015
0.38
0.09
0.041
5950
26500
2700
12000
B543DD
1.702
43.23
0.015
0.38
0.015
0.38
0.10
0.045
6880
30500
3200
14300
B544DD
1.970
50.04
0.015
0.38
0.015
0.38
0.11
0.050
7980
35500
3600
16000
B545DD
2.286
58.06
0.015
0.38
0.015
0.38
0.15
0.068
9220
41500
4000
17600
B546DD
2.527
64.19
0.015
0.38
0.015
0.38
0.17
0.077
10150
45500
4400
19600

(1) +.0010" (+.025mm), -.0010" (-.025mm).
(2) ' +.0000" (+.000mm), -.0015" (-.038mm).
(3) Maximum shaft or housing fillet radius which bearing comers will clear.

Note: These bearings should not be used as track rollers, cam follower rolls, and the like

* Check for availability.