81/82 - 5/8 ” Square Single-Turn Panel Control
85/86 - 5/8 ” Square Single-Turn Panel Control with Rotary Switch
How to Order
81
85
A
A
2
2
A
A
-
-
B
B
28
28
-
-
A
A
15
15
/
/
A 15
R51
L
L
Models 81 & 82: Part number for multiple section potentiometers
must have a taper and resistance value for each section.
Models 85 & 86: Part number must contain a switch type.
A
B
C
D
E
F
J
K
# SECTIONS
1
Single
2
Double
3
Triple
4
Quad
ANTI-ROTATION LUG
Single .305 R, 90 °CW
Double .305 R, 90 ° & 270 °CW
Single .305 R, 270 °CW
No Lug
Single .531 R, 90 °CW
Single .305 R, 180 °CW
Single .375 R, 90 °CW
Double .375 R, 90 ° & 270 °CW
POTENTIOMETER TYPE
L
RoHS Compliant
Blank Standard
APPLICABLE MODELS
81,82
81,82,85,86
81,82,85,86
81,82,85,86
A
B
C
E
J
N
R
U
BUSHING
Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.65 mm) L
Locking 3/8 ” (9.65 mm) D x 1/2 ” (12.7 mm) L
Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L
Locking 1/4 ” (6.35 mm) D x 1/2 ” (12.7 mm) L
Plain 3/8 ” (9.65 mm) D x 1/4 ” (6.35 mm) L
Plain 1/4 ” (6.35 mm) D x 3/8 ” (9.65 mm) L
Plain 10 mm D x 9 mm L
Plain 7 mm D x 6 mm L
81
82
85
86
MODEL
Single-Turn, PC Pins
Single-Turn, J-Hooks
Single-Turn, Pot/Rotary Switch, PC Pins
Single-Turn, Pot/Rotary Switch, J-Hooks
SHAFT
AVAILABLE
LENGTH
ONLY IN
(FMS)
BUSHING
Code Description
Code
12 3/8 ”L
C, N, J
16 1/2 ”L
A, C, J, N
20 5/8 ”L
A, B, C, E, J, N
24 3/4 ”L
A, B, C, E, J, N
28 7/8 ”L
A, B, C, E, J, N
32 1 ”L
A, B, C, E, J, N
36 1-1/8 ”L
A, B, C, E, J, N
40 1-1/4 ”L
A, B, C, E, J, N
METRIC
10 10 mmL
U
13 13 mmL
U
16 16 mmL
R
19 19 mmL
R
22 22 mmL
R, U
30 30 mmL
R
42 42 mmL
R
50 50 mmL
R
SWITCH TYPE (MODELS 85 & 86 ONLY)
(R50) DPST N.O./N.C. CW Detent In-Line Term
(R51) DPST N.O./N.C. CCW Detent In-Line Term
(R52) DPST N.O./N.O. CW Detent In-Line Term
(R53) DPST N.O./N.O. CCW Detent In-Line Term
(R54) DPST N.C./N.C. CW Detent In-Line Term
(R55) DPST N.C./N.C. CCW Detent In-Line Term
(R56) DPST N.O./N.C. CW Detent Horz Term
(R57) DPST N.O./N.C. CCW Detent Horz Term
(R58) DPST N.O./N.O. CW Detent Horz Term
(R59) DPST N.O./N.O. CCW Detent Horz Term
(R60) DPST N.C./N.C. CW Detent Horz Term
(R61) DPST N.C./N.C. CCW Detent Horz Term
(R70) DPDT CW Detent In-Line Term
(R71) DPDT CCW Detent In-Line Term
(R72) DPDT CW Detent Horz Term
(R73) DPDT CCW Detent Horz Term
ELEMENT TYPE
TAPER/TOLERANCE
(A) Linear Cermet ±10 %
(H) Linear Cermet ±5 %
AVAILABLE ONLY IN
SHAFT TYPE
A
B
C
E
F
G
K
L
M
N
P
R
T
V
Single Plain 1/4 ” (6.35 mm) D
Single Slotted 1/4 ” (6.35 mm) D
Single Flatted 1/4 ” (6.35 mm) D
Single Slotted 1/8 ” (3.18 mm) D
Single Flatted 1/8 ” (3.18 mm) D
Dual Concentric Plain 1/4 ” (6.35 mm) D - 1/8 ” (3.18 mm) D
Outer Operates Section 1
Dual Concentric Plain 1/8 ” (3.18 mm) D - 5/64 ” (1.98 mm) D
Outer Operates Section 1
Dual Concentric Plain 1/4 ” (6.35 mm) D - 1/8 ” (3.18 mm) D
Outer Operates Section 1/2
Dual Concentric Plain 1/8 ” (3.18 mm) D - 5/64 ” (1.98 mm) D
Outer Operates Section 1
Dual Concentric Plain 1/4 ” (6.35 mm) D - 1/8 ” (3.18 mm) D
Outer Operates Section 1/2/3
Dual Concentric Plain 1/8 ” (3.18 mm) D - 5/64 ” (1.98 mm) D
Outer Operates Section 1/2
Single Slotted 6 mm D
Single Slotted 4 mm D
Dual Concentric Plain 6 mm D - 3 mm D
Outer Operates Section 1
LENGTHS
(CODE)
16,20,24,28
16,20,24,28
20,24,28
12,16,20,24,28
Consult Factory
36,40
32,36
36,40
32,36
36,40
32,36
16,19,22,50
10, 13, 22
30, 42
BUSHINGS
(CODE)
A, B, J
A, B, J
A, B, J
C, E, N
C, N
A, J
C, N
A, J
C, N
A, J
C, N
R
U
R
(C)
(D)
(F)
(G)
(S)
(T)
CW Audio Cermet ±10 %
CW Audio C-P ±20 %
CCW Audio Cermet ±10 %
CCW Audio C-P ±20 %
CW Audio C-P ±10 %
CCW Audio C-P ± 10 %
(B) Linear C-P ±20 %
(E) Linear C-P ±10 %
RESISTANCE CODE
VALUE IN OHMS
(05) - 100
(30) - 15 K
(28) - 150
(16) - 20 K
(06) - 200
(17) - 25 K
(07) - 250
(18) - 50 K
(08) - 500
(19) - 75 K
(09) - 750
(20) - 100 K
(10) - 1 K
(31) - 150 K
(29) - 1.5 K (21) - 200 K
(11) - 2 K
(22) - 250 K
(12) - 2.5 K (23) - 500 K
(13) - 5 K
(24) - 750 K
(14) - 7.5 K (25) - 1 M
(15) - 10 K
(10) - 1 K
(18) - 50 K
(12) - 2.5 K
(20) - 100 K
(13) - 5 K
(22) - 250 K
(15) - 10 K
(23) - 500 K
(16) - 20 K (25) - 1 M
(17) - 25 K
(10) - 1 K
(18) - 50 K
(12) - 2.5 K
(20) - 100 K
(13) - 5 K
(22) - 250 K
(15) - 10 K
(23) - 500 K
(17) - 25 K (25) - 1 M
(18) - 50 K
Boldface features are Bourns standard options.
All others are available with higher minimum order
quantities.
REV. 04/06
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
