51/53 - Sealed 1/2 ” (12.5 mm) Square Control
Shaft/Bushing Styles
How To Order
51
A Style Bushing
STD. LENGTH ‘L’
9.53
A
A
D
-
B
28
-
A
15
L
(.375)
1.60 0.25
.500
.625
.750
.875
1.000
(12.7)
(15.88)
(19.05)
(22.23)
(25.4)
OPT.
(.063 .010)
1.194 0.10
OPT.
(.047 .004)
3/8-32UNEF-2A
9.53
(.375)
6.35
(.250)
SHAFT
BUSHING
RoHS IDENTIFIER
Code Description
L
Compliant
C Style Bushing
STD. LENGTH ‘L’
6.35
(.250)
0.79 0.25
(.031 .010)
OPT.
.375
.500
.625
.750
.875
1.000
(9.53)
(12.7)
(15.88)
(19.05)
(22.23)
(25.4)
ELEMENT TAPER
TYPE/TOLERANCE
Code Description
RESISTANCE
(CODE)
VALUE IN OHMS
MOUNTING BRACKET/
ANTI-ROTATION LUG
0.79 0.10
(.031 .004)
OPT.
(A)
Linear Cermet 1ꢀ ꢁ (28) — 150
(14) — 7.5 K
(15) — 1ꢀ K
(30) — 15 K
(16) — 20 K
(17) — 25 K
(18) — 5ꢀ K
1/4-32UNEF-2A
6.35
(H)
Linear Cermet ±5 %
(06) — 200
(07) — 250
(08) — 500
(09) — 750
(1ꢀ) — 1 K
Code Description
3.18
(.125)
SHAFT
BUSHING
A
D
L
AR Lug 9ꢀ °CW
No AR Lug or Bracket
Front Bracket
(.250)
15.88
(.625)
9.53
(.375)
MAX. FLAT LENGTH
A Style Bushing -
Flatted Shaft
STD. LENGTH ‘L’
(29) — 1.5 K (19) — 75 K
M
N
Rear Bracket
Front and Rear Bracket
1.52 0.25
OPT.
(11) — 2 K
(12) — 2.5 K (23) — 500 K
(2ꢀ) — 1ꢀꢀ K
(.060 .010)
.625
.750
.875
(15.88)
(19.05)
(22.23)
(25.4)
(13) — 5 K
(1ꢀ) — 1 K
(25) — 1 M
(B)
Linear C-P 2ꢀ ꢁ
(18) — 5ꢀ K
# SECTIONS/DETENTS
(E)
Linear C-P ±10 %
(12) — 2.5 K (2ꢀ) — 1ꢀꢀ K
1.000
5.49 0.10
(.216 .005)
(13) — 5 K
(22) — 250 K
Code Description
OPT.
3/8-32UNEF-2A
9.53
(15) — 1ꢀ K (23) — 500 K
(16) — 20 K (25) — 1 M
(17) — 25 K
A
B
E
F
Single No Detent
6.35
(.250)
Double No Detent
SHAFT
BUSHING
(.375)
Single w/Center Detent
Double w/Center Detent
(C)
(F)
CW Audio Cermet
±10 %
CCW Audio Cermet
±10 %
(10) — 1 K
(12) — 2.5 K (20) — 100 K
(13) — 5 K (23) — 500 K
(18) — 50 K
.315
(8.0)
S Style Bushing
STD. LENGTH ‘L’
1.52 0.25
(.060 .010)
(15) — 10 K (25) — 1 M
(17) — 25 K
.394
.512
.630
.866
.984
(10.0)
(13.0)
(16.0)
(22.0)
(25.0)
BUSHING CONFIGURATION
Code Description
(D)
CW Audio C-P 2ꢀ ꢁ (1ꢀ) — 1 K
CW Audio C-P ±10 % (12) — 2.5 K (2ꢀ) — 1ꢀꢀ K
(22) — 250 K
(18) — 5ꢀ K
(S)
0.79 0.10
(.031 .004)
A
C
R
S
U
3/8 ” D x 3/8 ” L
(13) — 5 K
M6 X .075-6g
6.0
1/4 ” D x 1/4 ” L
(15) — 1ꢀ K (23) — 500 K
3.0
(.118)
1ꢀ mm D x 9.5 mm L
6 mm D x 8 mm L
7 mm D x 8 mm L
(17) — 25 K (25) — 1 M
SHAFT
BUSHING
(2.36)
(G)
(T)
CCW Audio C-P
±20 %
CCW Audio C-P
±10 %
(10) — 1 K
(12) — 2.5 K (20) — 100 K
(13) — 5 K (22) — 250 K
(18) — 50 K
(15) — 10 K (23) — 500 K
(17) — 25 K (25) — 1 M
8.0
(.315)
U Style Bushing
STD. LENGTH ‘L’
1.52 0.25
(.060 .010)
MODEL
(Y)
CW Dual Audio
(10) — 1 K
(12) — 2.5 K (20) — 100 K
(13) — 5 K (22) — 250 K
(18) — 50 K
.394
.512
.630
.866
.984
(10.0)
(13.0)
(16.0)
(22.0)
(25.0)
Code Description
Taper C-P ±20 %
51 PC Pins (.1ꢀꢀ ” centers)
53 Solder Lugs
0.79 0.10
(.031 .004)
(15) — 10 K (23) — 500 K
(17) — 25 K (25) — 1 M
M7 X .075-6g
7.0
4.0
(.157)
SHAFT
BUSHING
(2.75)
9.5
(.374)
AVAILABLE ONLY IN
SHAFT
AVAILABLE
ONLY IN
BUSHING
Code
C
R Style Bushing
STD. LENGTH ‘L’
1.80 0.25
(.071 .010)
SHAFT TYPE
BUSHINGS
LENGTHS
LENGTH
Code Description
Code
A
Description
(FMS)
.512
.630
.866
.984
(13.0)
(16.0)
(22.0)
(25.0)
Code Description
B
C
D
E
R
T
Single Slotted 1/4 ”D
Single Flatted 1/4 ”D
Single Plain 1/8 ”D
Single Slotted 1/8 ”D
Single Slotted 6 mmD
Single Slotted 4 mmD
Single Slotted 3 mmD
24,28
20,24,28,32
16,20,24,28
12,16,20,24,28
16,22,25
12
16
20
24
28
32
3/8 ”
1/2 ”
5/8 ”
3/4 ”
7/8 ”
1 ”
A
1.00 0.10
(.039 .004)
A, C
A, C
C
C
M10 X 0.75-6g
10.0
A, C
6.0
(.236)
R
A, C
SHAFT
BUSHING
(.394)
U
16,22,25
A, C
U
S
16,22,25
Metric
16
22
25
16 mm
22 mm
25 mm
R, S, U
R, S, U
R, S, U
MM
(INCHES)
DIMENSIONS:
Boldface features are Bourns standard options. All others are available with higher
minimum order quantities.
REV. 09/11
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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