Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
.203 ± .003
(5,16 ± 0,08)
ACROSS
FLATS
DIMENSION
D
A
POS. 1
OPTIONAL
PANEL SEAL
GASKET
.093 ± .005
(2,36 ± 0,13)
.171 ± .015
(4,34 ± 0,38)
.125 (3,18)
REF.
TERMINALS ARE
.016 ± .003 (0,41 ± 0,08) SQ.
TERMINAL SEALANT
IN STYLE T
COMMON Ø .025 ± .002
(0,64 ± 0,06) AND EXTEND
TO SAME PLANE AS
POSITION TERMINALS
.125 ± .015
(3,18 ± 0,38)
.020 ± .003
(0,51 ± 0,08)
.020 ± .004
(0,51 ± 0,10)
.062 ± .003
(1,57 ± 0,08)
.171 ± .015
(4,34 ± 0,38)
Ø .025 ± .002
(0,64 ± 0,05)
GRAYHILL
91012
+.001- .002
Ø.125
.375±.015
(9,53±0,38)
.250±.015
(6,35±0,38)
DIMENSION "B"
.125±.015
(3,18±0,38)
1/4-28 UNF-2A
THREAD
.250±.015
(6,35±0,38)
TERMINAL
SEALANT
IN STYLE "T"
(3,18 + 0,03 -0,05)
.064 ± .005
(1,63 ± 0,13)
.020 ± .004
(0,51 ± 0,10)
.062 ± .004
(1,57 ± 0,10)
.032 ± .004
(0,81 ± 0,10)
.064 ± .005
(1,63 ± 0,13)
.016 ± .004
(0,41 ± 0,10)
.046 ± .004
(1,17 ± 0,10)
.021 ±.004
(0,53 ± 0,10)
GRAYHILL
91012
Ø.125 + .001 - .002
(3,18 + 0,03 - 0,05)
.375±.015
(9,53±0,38)
.250±.015
(6,35±0,38)
1/4-28 UNF-2A
THREAD
.250±.015
(6,35±0,38)
TERMINAL
SEALANT
IN STYLE "T"
.658±.015
(16,71±0,38)
.153±.015
(3,89±0,38)
.234±.015
(5,94±0,38)
Solder Lug Style
PC Mount Style
Front view same as
PC Mount style.
DIMENSIONS In inches (and millimeters)
SERIES 50 SERIES 51
0.5" Diameter, 200mA,
.698" Behind Panel
FEATURES
• Optional Complete Seal for
PC Board Assembly and Cleaning
• Small 1/2" Diameter
• Choice of 22.5°, 30°, 36°, 45°, 60°
and 90° Angles of Throw
• Up to 4 Poles on 1 Deck
• Up to 16 Positions Per Switch
• PC or Solder Lug Termination
• Positive Shaft Grounding for
EMI/RFI Shielding
Angle of Angle Angle of Angle
Throw A Throw A
22.5° 101.25° 45° 112.5°
30° 105° 60° 120°
36° 108° 90° 135° DB
Dimension Style T All Others All 22.5°
.576 ± .015 .537 ± .015 .537 ± .015
(14,63 ± 0,38) (13,64 ± 0,38) (13,64 ± 0,38)
Dimension Series 50 Series 51
.500 ± .015 .562 ± .015
(12,70 ± 0,38) (14,27 ± 0,38)
Side View
All others as shown at left
Grayhill part number and date code
marked on label. Customer part
number marked on request. Military
part number marked when required.
PC TERMINAL DETAIL
All angles of throw, except 22.5°
PC COMMON DETAIL
All angles of throw, except 22.5°
SOLDER LUG TERMINAL DETAIL
All angles of throw, except 22.5°
SOLDER LUG TERMINAL DETAIL 22.5°
Rotary
4
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
PC MOUNT
.500 ± .015
(12,7 ± 0,13)
DIA. CIRCLE
OF CENTERS
.156 ± .015
(3,96 ± 0,13)
LOCATION
OF COMMONS
2 POLES
COMMON TERMINAL
(1 POLE)
11.25˚
22.5˚
POS. 1
DIM. A ±
.005 (0,13)
POLE 1
POS. 1
THREE POLES
Dimension A, diameter circle of common centers,
is .175 (4,45) for Solder Lug and .232 (5,89) for PC.
CIRCUIT DIAGRAMS AND REAR VIEWS: Solder Lug and PC Mount
TWO POLES
Circuit as Viewed From Shaft End
TWO POLES
TWO POLES
TWO POLESONE POLE
ONE POLE
ONE POLE
ONE POLE
FOUR POLES
TWO POLES
THREE POLES
ONE POLE
TWO POLESONE POLE
Rear View
7
8
9
10
14
15
16
13
11 12
1
2
3
4
5
6
C2
C1
7
8
910
11
12
1
2
3
4
5
6
7
8
910
11
12
1
2
34
5
6
C2
C1
7
8
910
11
12
1
2
34
5
6
C3
C2 C1
7
8
910
11
12
1
2
34
5
6
C3
C4
C2 C1
6
7
89
10
1
2
3
4
5
C2
C1
6
7
89
10
1
2
3
4
5
5
67
8
1
2
3
4
5
67
8
1
2
3
4
C2
C1
1
2
3
4
5
6
1
2
3
4
5
6
C2
C1
34
1
2
34
1
2
C2
C1
7
8
9
10
14
15
16
13
11 12
1
2
3
4
5
6
90° Angle
of Throw
60° Angle
of Throw
45° Angle
of Throw
30° Angle
of Throw
36° Angle
of Throw
22.5° Angle
of Throw
COMMON TERMINAL
(1 POLE)
SOLDER LUG
.382 ± .015 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.156 ± .015
(3,96 ± 0,13)
LOCATION
OF COMMONS
2 POLES
11.25˚
22.5˚
POS. 1
COMMON TERMINAL (1 POLE)
.382 ± .005 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.156 ± .005 (3,96 ± 0,13)
LOCATION OF COMMONS
2 POLES
30˚
15˚
POS. 1
18˚
36˚
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
LOCATION OF COMMONS
2 POLES
COMMON TERMINAL (1 POLE)
POS. 1
.125 ± .015
(3,18 ± 0,38)
45˚
22.5˚
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
LOCATION OF COMMONS
2 POLES
COMMON TERMINAL (1 POLE)
POS. 1
.125 ± .015
(3,18 ± 0,38)
60˚
30˚
LOCATION OF COMMONS
2 POLES
POS. 1
.125 ± .015
(3,18 ± 0,38)
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
45˚
90˚
LOCATION OF COMMONS
2 POLES
POS. 1
.125 ± .015
(3,18 ± 0,38)
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.175 ± .005
(4,45 ± 0,13)
DIAMETER
CIRCLE OF
COMMON
CENTERS
FOUR POLES
POS. 1
POLE 1
Rotary
5
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
SPECIFICATIONS
Military Qualification
The dimensions for qualified switches are
the same as those indicated in the drawings
of standard switches. Switches with standard
variations, such as shaft and bushing length,
which do not affect switch performance, can be
marked as qualified product. Contact Grayhill
for complete information on variations.
36°, 45°, 60°, 90° (Series 50): The C and M
style switches are qualified to MIL‑S‑3786/20.
They include the following:
Solder lug or PC terminals
With or without panel seal
Series 50 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
30° (Series 51): The C and M style switches
are qualified to MIL‑S‑3786/35. They include
the following:
Solder lug or PC terminals
With or without panel seal
Series 51 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
Additional Characteristics
Contact Type and Forces: Shorting or non‑
shorting wiping contacts with over 80 grams
of contact force.
Shaft Flat Orientation: Flat opposite contacting
position of pole number one (see circuit
diagrams).
Terminals: Switches have the full circle of
terminals, regardless of number of active
position.
Stop Strength: 7.5 pound‑inches minimum
Rotational Torque: 8–24 ounce‑inches,
depending on the number of poles.
SPECIFICATIONS: Other
PROCESS SEALED–Style T
Switch can be mounted on PC board with other
components and subjected to wave soldering
and conventional board cleaning techniques. No
secondary wiring or soldering is necessary.
Bushing is o‑ring sealed; epoxy potting seals the
terminals and the rear of the switch. Designed
for PC assembly, this sealing technique can also
be applied to solder lug terminal switches. A
bushing to panel seal can also be added to the
process sealed versions. Military qualified ver‑
sions are available, see ordering information.
Electrical Ratings
Life Expectancy: With the limiting criteria stated
here, the Series 50 and 51 with non‑shorting
contacts will switch the following loads at
atmospheric and reduced pressures for 25,000
cycles of operations. One cycle is 360° rotation
clockwise and 360° return.
At 85°C, atmospheric pressure
200 mA, 28 Vdc resistive
150 mA, 115 Vac resistive
30 mA, 28 Vdc inductive
100 mA, 28 Vdc lamp load
75 mA, 220 Vac lamp load
At 25°C, reduced pressure (70,000 feet)
200 mA, 28 Vdc resistive
150 mA, 115 Vac resistive
75 mA, 220 Vac resistive
Contact Resistance: 20 milliohms maximum,
(10 milliohms initially).
Insulation Resistance: 1,000 Mohms
minimum between mutually insulated parts.
Voltage Breakdown: 600 Vac minimum
between mutually insulated parts at standard
atmospheric pressure.
Life Expectancy: Listed for the voltage source
and make and break current levels. Contact
Grayhill for more information if any of the
following is true: the life limiting criteria are
more critical than those listed; longer operation
is required; a larger make and break current is
required; the operating environment includes
elevated temperatures or reduced pressures.
Contact Carry Rating: Switch will carry
6 amperes continuously with a maximum
contact temperature rise of 20°C.
Materials and Finishes
Switch Base: Thermoset
Detent Rotor: Nylon
Shaft, Stop Blades, Stop Arm, Thrust washer,
and Retaining Ring: Stainless steel
Detent Balls: Steel, nickel‑plated
Bushing: Zinc, tin‑zinc plated
Detent and Contact Springs: Stainless steel
Common Ring: Brass, gold‑plated over silver
plate.
Terminals: Brass, gold‑plated over silver plate
and nickel plate
Rotor Contact: Precious metal alloy, gold‑
plated
Panel Seal: Silicone rubber
Shaft Seal: Fluorosilicone
Mounting Nuts: Brass, tin‑zinc plated
Mounting Hardware: One mounting nut .089"
thick by .375" across flats and one internal tooth
lockwasher are supplied with the switch.
Maximum Mounting Torque: 15in‑lbs
1/4" SHAFT: Style K
POS. 1
CIRCLE SHOWING
DIMENSIONS OF
HOLE TO BE CUT
IN PANEL.
POS. 1
POS. 1
Ø0.254 Ø0.280
Ø0.380
0.208 0.240 0.350
1/8"Shaft "E" Style "K" Style
3/8-32 UNEF-2A
THREAD
.250
±.015
.375
±.015
+.001
-.002
.250
.250
±.015
.340
±.005
.219
±.004
Rotary
6
"K" Style
POS. 1
Ø0.380
0.350
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
ADJUSTABLE STOPS: Style D
Adjustable stops permit the user to set and
reset the number of positions per poles. Shown
in the diagram, a plastic washer can be removed
to reveal slots at the base of the bushing. Stop
blades can be inserted into the appropriate slots
to limit switch rotation. Positions per pole
configuration can thus be changed to meet the
needs of the application. Dimensions are the
same as the fixed stop version, when plastic
washer is in place. Most desirable for prototype
work. Readily available from local distributor.
Shaft and panel seal switches
are watertight to the panel. They
are not totally process sealed
like the Style “T”. Panel is sealed
by a gasket at the base of the
bushing. Shaft is sealed by an
O-ring inside the bushing. After
mounting, seals do not alter
switch dimensions. See Style
“S” (standard switches) and
Style “M” (military switches) in
the Choices and Limitations
chart.
SHAFT AND PANEL SEAL: Styles S and M
SCREWDRIVER SLOTTED SHAFT: Style B
Form, fit and function equiva-
lent to standard shaft switches.
The dimensions shown have
evolved as the most popular for
this type of switch. See Style “B”
in the Choices and Limitations
chart. Previous users may have
ordered these switches by a
non-descriptive part number
containing a “Y”. Contact
Grayhill, if in doubt about a
cross-reference.
METRIC SHAFT AND BUSHING: Style E
Metric standard dimensions for
the shaft and bushing are shown
in the drawing. Other dimensions
approximately the same as
shown in dimensional drawing.
Contact Grayhill for exact
dimensions. See Style “E” in
the Choices and Limitations
chart.
SUGGESTED ADJUSTABLE STOP
SUBSTITUTION GUIDE
Fixed Adj. Stop Fixed Adj. Stop
Stop Style Stop Style
Style Equivalent Style Equivalent
50A 50D 51A 51D
50C 50CD 51C 51CD
50CP 50CDP 51CP 51CDP
50M 50CD* 51M 51CD*
50MP 50CDP* 51MP 51CDP*
50P 50DP 51P 51DP
50S 50D* 51S 51D*
50SP 50DP* 51SP 51DP*
*Form fit and function equivalents, but not watertight sealed to
the panel.
Stop
Blade
Slots
Plastic
Washer Stop
Blades
ACCESSORY: Non-Turn Washers
In Inches (and millimeters)
Part No. 71J1103
Designed to fit the double flatted bushing
of the metric dimensioned bushing, this
non-turn washer permits a round hole for
the bushing and the tab while still prevent-
ing switch rotation. Washer is only sold
when accompanied by a like number of
switches. Washer is 302 stainless steel.
.250 ± .003
(6,35 ± 0,08)
.060 ± .001
(1,52 ± 0,25)
.400
± .005
DIA.
(10,16
± 0,13) 90° ± 1°
.125
± .005
(3,16
± 0,13)
.015
(0,38)
RADIUS
MAX.
.025
± .001
(0,64
± 0,03)
Dimensions are in millimeters
Part No. 50J1066
Cut round hole for the bushing and for the
non-turn tab. Washer fits the double D
bushing flats. Washer is sold only when
accompanied by an order for a like number
of switches. Washer is 302 stainless steel.
C
L
1,57 ± 0,08
5,08
± 0,05
11,13
± 0,13
DIA.
90˚ ± 1˚
0,64
± 0,05
2,36
± 0,13
.015
(0,38)
RADIUS
MAX.
0.032
0.375
0.125 0.187
SEAL
"A"
.032±.005
(0,81±0,13)
.125±.015
(3,18±0,38)
.050±.005
(1,27±0,13)
7,0
±0,51
9,53
±0,38
6,35
±0,38)
4,0
±0,03 M7 x 0,75
6,0±0,08
3,15
±0,12
"A"
Part No. 50J5140-4
Designed to fit the single flatted bushing of
the "K" style switches, this non-turn washer
prevents switch rotation when using a full
round hole in the panel. Washer is only sold
when accompanied by a like number of
switches. Washer is 302 stainless steel.
Rotary
7
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 50
Angle Number Number of Shorting or
Style Choices1of of Positions Non-Shorting
Series Std., 1/8" Shaft 1/4" Shaft Metric, 4mm Shaft Terminals Throw Poles Per Pole Contacts
36°
45°
60°
90°
Solder
Lug
50
PC Mount
1 02 thru 10 N or S
2 02 thru 05 N or S
1 02 thru 08 N
2 02 thru 04 N
1 02 thru 06 N
2 02 or 03 N
1 02 thru 04 N
202 N
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
A
AT
B
BS
BST
BT
D
S
ST
36°
45°
60°
90°
1 02 thru 10 N or S
2 02 thru 05 N or S
1 02 thru 08 N
2 02 thru 04 N
1 02 thru 06 N
2 02 or 03 N
1 02 thru 04 N
202 N
E
ES
EST
ET
EB
EBS
EBST
EBT
K
KS
KST
KT
KB
KBS
KBST
KT
Standard Style
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
KP
KPT
KSP
KSPT
KBP
KBSP
KBSPT
KBT
EP
EPT
ESP
ESPT
EBP
EBSP
KBSPT
EBT
Angle Number Number of Shorting or
Style Choices of of Positions Non-Shorting
Series Std., 1/8" Shaft 1/4" Shaft Metric, 4mm Shaft Terminals Throw Poles Per Pole Contacts
36°
45°
60°
90°
Solder
Lug
50
PC Mount
1 02 thru 10 N or S
2 02 thru 05 N or S
1 02 thru 08 N
2 02 thru 04 N
1 02 thru 06 N
2 02 or 03 N
1 02 thru 04 N
202 N
C
CB
CBT
CD
CT
M
MB
MBT
MT
36°
45°
60°
90°
1 02 thru 10 N or S
2 02 thru 05 N or S
1 02 thru 08 N
2 02 thru 04 N
1 02 thru 06 N
2 02 or 03 N
1 02 thru 04 N
202 N
EM
EMB
EMBT
EMT
Military Style
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
EMBP
EMBPT
EMP
EMPT
KM
KMB
KMBT
KMT
KMBP
KMBPT
KMP
KMPT
Rotary
8
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 51
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
Angle Number Number of Shorting or
Style Choices of of Positions Non-Shorting
Series Std., 1/8" Shaft 1/4" Shaft Metric, 4mm Shaft Terminals Throw Poles Per Pole Contacts
Solder
Lug
51
PC Mount
C
CB
CBT
CD
CT
M
MB
MBT
MT
EM
EMB
EMBT
EMT
Military Style
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
EMBP
EMBPT
EMP
EMPT
30°
1 02 thru 12 N or S
2 02 thru 06 N or S
3 02 thru 04 N or S
4 02 or 03 N or S
30°
1 02 thru 12 N or S
2 02 thru 06 N or S
3 02 thru 04 N or S
4 02 or 03 N or S
1 Contact Grayhill if 1/4" or metric shaft required with a 22.5° angle of throw.
KM
KMB
KMBT
KMT
KMBP
KMBPT
KMP
KMPT
Angle Number Number of Shorting or
Style Choices1of of Positions Non-Shorting
Series Std., 1/8" Shaft 1/4" Shaft Metric, 4mm Shaft1Terminals Throw Poles Per Pole Contacts
22.5°
30°
Solder
Lug
51
PC Mount
1 02 thru 16 N or S
2 02 thru 08 N or S
1 02 thru 12 N or S
2 02 thru 06 N or S
3 02 thru 04 N or S
4 02 or 03 N or S
A AT
B BT
S ST
BS BST
A
AT
B
BS
BST
BT
D
S
ST
E
ES
EST
ET
K
KS
KST
KT
Standard Style
PPT
BP BPT
SP SPT
BSP BSPT
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
KP
KPT
KSP
KSPT
EP
EPT
ESP
ESPT
22.5°
30°
1 02 thru 16 N or S
2 02 thru 08 N or S
1 02 thru 12 N or S
2 02 thru 06 N or S
3 02 thru 04 N or S
4 02 or 03 N or S
Solder
Lug
PC Mount
SEE BELOW SEE BELOW
SEE BELOW SEE BELOW
Rotary
9
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Single Deck Rotary Switches
Series: Series 51 (30°; 22.5°)
Style*: Letters from Choices Chart
Angle of Throw: Use 22 (for 22.5°), 30
51SPT30–01–1–12S–F
Stop Arrangement:
Needed only with 1 pole switches with
maximum positions.
Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
ORDERING INFORMATION: Series 50
ORDERING INFORMATION: Series 51
ADDITIONAL FEATURES
Economy keylock switch, isolated position,
spring return, and coded switches are available
in similar series. See Keylock and Special
Function Rotary Switch sections.
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Office, an authorized local Distributor, or Grayhill.
Series: Series 50 (36°, 45°, 60°, or 90°)
Style*: Letters from Choices Chart
Angle of Throw: 36, 45, 60, or 90
50AT36–01–1–10N–F
Stop Arrangement:
Needed only with 1 pole switches with
maximum positions.
Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying
the military part number identified on the appropriate slash sheet.
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying
the military part number identified on the appropriate slash sheet.
Rotary
10
