Base Bracket (without Rubber Ring)
Model A
in. (mm)
B
in. (mm)
C
in. (mm)
D
(Dia.)
in. (mm)
E
in. (mm)
F
in. (mm)
G
in. (mm)
H
in. (mm)
L
(Dia.)
in. (mm)
Wt.
lbs. (kg)
BB-47

10.24
(260)

7.87
(200)
3.94
(100)
4.72
(120)
2.95
(75)
1.38
(35)
8.86
(225)
3.94
(100)
.67
(17)
5.1
(2.3)
BB-53

10.63
(270)

7.09
(180)
3.94
(100)
5.31
(135)
3.15
(80)
1.57
(40)
9.84
(250)
4.84
(123)
.67
(17)
5.3
(2.4)
BB-67

10.24
(260)

7.88
(200)
3.94
(100)
6.69
(170)
2.95
(75)
1.38
(35)
8.86
(225)
4.84
(123)
.67
(17)
4.5
(2.0)
BB-69

10.20
(259)

7.80
(198)
3.90
(99)
6.69
(170)
2.70
(75)
1.00
(25)
9.00
(228)
5.10
(129)
.75
(19)
4.6
(2.1)
BB-75

12.99
(330)

8.66
(220)
7.87
(200)
7.48
(190)
5.51
(140)
2.36
(60)
13.39
(340)
6.69
(170)
.87
(22)
12.3
(5.6)
BB-83

15.35
(390)

10.63
(270)
9.45
(240)
8.31
(211)
7.09
(180)
2.36
(60)
15.35
(390)
7.68
(195)
.87
(22)
16.9
(7.7)

Rubber Ring
Model A
in. (mm)
B
in. (mm)
C
in. (mm)
D
(Dia.)
in. (mm)
E
in. (mm)

F
in. (mm)

Use with Base
Bracket No.
RR-425 5.91
(150)
4.72
(120)
4.69
(119)

4.25
(108)

.79
(20)

.59
(15)
BB-47
RR-625 7.87
(200)
6.69
(170)
6.65
(169)
6.26
(159)
.79
(20)
.59
(15)
BB-53, -67, -69
RR-787 9.84
(250)
8.66
(220)
8.27
(210)
7.87
(200)
.98
(25)
.79
(20)
BB-75, -83