OPT.

3/8-32UNEF-2A

1/4-32UNEF-2A

3/8-32UNEF-2A

M6 X .075-6g

M7 X .075-6g

M10 X 0.75-6g

9.53

(.375)

1.60 ± 0.25

(.063 ± .010)

OPT.

1.194 ± 0.10

(.047 ± .004)

SHAFT

6.35

(.250)

BUSHING

9.53

(.375)

OPT.

6.35

(.250)

0.79 ± 0.25

(.031 ± .010)

OPT.

0.79 ± 0.10

(.031 ± .004)

SHAFT

3.18

(.125)

BUSHING

6.35

(.250)

OPT.

9.53

(.375)

1.52 ± 0.25

(.060 ± .010)

OPT.

5.49 ± 0.10

(.216 ± .005)

SHAFT

6.35

(.250)

BUSHING

9.53

(.375)

MAX. FLAT LENGTH

15.88

(.625)

8.0

(.315)

1.52 ± 0.25

(.060 ± .010)

0.79 ± 0.10

(.031 ± .004)

SHAFT

3.0

(.118)

BUSHING

6.0

(2.36)

8.0

(.315)

1.52 ± 0.25

(.060 ± .010)

0.79 ± 0.10

(.031 ± .004)

SHAFT

4.0

(.157)

BUSHING

7.0

(2.75)

9.5

(.374)

1.80 ± 0.25

(.071 ± .010)

1.00 ± 0.10

(.039 ± .004)

SHAFT

6.0

(.236)

BUSHING

10.0

(.394)

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their specific applications.

51/53 - Sealed 1/2 ” (12.5 mm) Square Control

Shaft/Bushing Styles

STD. LENGTH ‘L’

.500

(12.7)

.625

(15.88)

.750

(19.05)

.875

(22.23)

1.000

(25.4)

A Style Bushing

STD. LENGTH ‘L’

.375

(9.53)

.500

(12.7)

.625

(15.88)

.750

(19.05)

.875

(22.23)

1.000

(25.4)

C Style Bushing

STD. LENGTH ‘L’

.625

(15.88)

.750

(19.05)

.875

(22.23)

1.000

(25.4)

A Style Bushing -

Flatted Shaft

STD. LENGTH ‘L’

.630

(16.0)

.866

(22.0)

.984

(25.0)

S Style Bushing

STD. LENGTH ‘L’

.630

(16.0)

.866

(22.0)

.984

(25.0)

U Style Bushing

STD. LENGTH ‘L’

.630

(16.0)

.866

(22.0)

.984

(25.0)

R Style Bushing

DIMENSIONS:

MM

(INCHES)

How To Order

51

A

A

D

-

B

28

-

A

15

Part number for multiple

section potentiometers

must have a taper

and resistance value

for each section.

SHAFT

AVAILABLE

LENGTH

ONLY IN

(FMS)

BUSHING

Code

Description

Code

12

3/8 ”

C

16

1/2 ”

A, C

20

5/8 ”

A, C

24

3/4 ”

A, C

28

7/8 ”

A, C

32

1 ”

A, C

Metric

16

16 mm

R, S, U

22

22 mm

R, S, U

25

25 mm

R, S, U

ELEMENT TAPER

RESISTANCE

TYPE/TOLERANCE

(CODE)

Code

Description

VALUE IN OHMS

(A)

Linear Cermet ±10 %

(28) — 150

(14) — 7.5 K

(H)

Linear Cermet ±5 %

(06) — 200

(15) — 10 K

(07) — 250

(30) — 15 K

(08) — 500

(16) — 20 K

(09) — 750

(17) — 25 K

(10) — 1 K

(18) — 50 K

(29) — 1.5 K

(19) — 75 K

(11) — 2 K

(20) — 100 K

(12) — 2.5 K

(23) — 500 K

(13) — 5 K

(25) — 1 M

(B)

Linear C-P ±20 %

(10) — 1 K

(18) — 50 K

(E)

Linear C-P ±10 %

(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

(C)

CW Audio Cermet

(10) — 1 K

(18) — 50 K

±10 %

(12) — 2.5 K

(20) — 100 K

(F)

CCW Audio Cermet

(13) — 5 K

(23) — 500 K

±10 %

(15) — 10 K

(25) — 1 M

(17) — 25 K

(D)

CW Audio C-P ±20 %

(10) — 1 K

(18) — 50 K

(S)

CW Audio C-P ±10 %

(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

(G)

CCW Audio C-P

(10) — 1 K

(18) — 50 K

±20 %

(12) — 2.5 K

(20) — 100 K

(T)

CCW Audio C-P

(13) — 5 K

(22) — 250 K

±10 %

(15) — 10 K

(23) — 500 K

(17) — 25 K

(25) — 1 M

(Y)

CW Dual Audio

(10) — 1 K

(18) — 50 K

Taper C-P ±20 %

(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

MODEL

Code

51

53

Description

PC Pins (.100 ” centers)

Solder Lugs

BUSHING CONFIGURATION

Code

A

C

R

S

U

Description

3/8 ” D x 3/8 ” L

1/4 ” D x 1/4 ” L

10 mm D x 9.5 mm L

6 mm D x 8 mm L

7 mm D x 8 mm L

MOUNTING BRACKET/

ANTI-ROTATION LUG

Code

A

D

L

M

N

Description

AR Lug 90 °CW

No AR Lug or Bracket

Front Bracket

Rear Bracket

Front and Rear Bracket

# SECTIONS/DETENTS

Code

A

B

E

F

Description

Single No Detent

Double No Detent

Single w/Center Detent

Double w/Center Detent

Boldface features are Bourns standard options. All others are available with higher

minimum order quantities.

AVAILABLE ONLY IN

SHAFT TYPE

BUSHINGS

LENGTHS

Code

Description

Code

Description

B

Single Slotted 1/4 ”D

A

24,28

C

Single Flatted 1/4 ”D

A

20,24,28,32

E

Single Slotted 1/8 ”D

C

12,16,20,24,28

R

Single Slotted 6 mmD

R

16,22,25

T

Single Slotted 4 mmD

U

16,22,25

U

Single Slotted 3 mmD

S

16,22,25

/

A15

L

RoHS IDENTIFIER

Compliant

L

REV. 05/13