Multi-Deck Rotary Switches
MILITARY QUALIFIED
Series 09
Series 08
Series 08 and 09 military switches are qualified
to MIL-DTL-3786/13. They include 30°, 36°, 45°
and 60° angles of throw with solder lug terminals
in sealed and unsealed styles. See front and
rear views at right. Standard variations which do
notaffectswitchperformancecanalsobemarked
as qualified product–contact Grayhill.
Front view shows terminal location of
Series 09, 30° angle of throw.
Transpose rear view for terminal location
of other angles of throw.
30° Angle of Throw
36° Angle of Throw
.562 .020
(14,27 0,51)
DIA.
.781 .020
(19,83 0,51)
OVꢁR TꢁRMINALS
.718 .020
(18,24 0,51)
OVꢁR
.260 .015
TꢁRMINALS
(6,60 0,38)
C
OF NON-TURN
TAB
L
.500 .020
(12,7 0,51)
DIA.
The military style is dimensionally the same as
the standard except for the solder lug. Convert
standard style switch drawings to military style
drawings by including this terminal detail and
changing the over-terminal dimensions shown
here.Grayhillcanprovidecompletespecification
drawings. Qualified switches can be ordered by
the Grayhill number or the "M" number; they will
be marked per MIL-DTL-3786/13.
15°
36°
Sꢁꢁ NOTꢁ
30°
.094 .010
(2,38 0,25)
Terminal Detail
.034 .003
(0,86 0,08)
Note: Common location for a single pole per
deck switch. For common location on
.068 .005
(1,73 0,13)
multi-pole switches, see circuit diagrams.
SPECIFICATIONS
Electrical Ratings
Standard Style
Rated: To make and break the following loads:
1/4 amp, 115 Vac resistive; 1/4 amp, 6-28 Vdc
resistive; 20 mA, 115 Vdc resistive; 50 mA, 115
Vac inductive; 20 mA, 28 Vdc inductive; to carry
4 amps continuous.
ContactResistance:50milliohmsmaximumafter Materials and Finishes
life
Military Qualified
Insulation Resistance: 1,000 megaohms
minimum between terminals and shaft
Dielectric Strength: 500 Vac (atmospheric
pressure) and 350 Vac (reduced pressure)
between mutually insulated parts.
DeckSeparators,EndPlateandSwitchBases:
Diallyl per (MIL-M-14) ASTM-D-5948
Rotor Mounting Plate: Thermoplastic
Mounting Bushing: Brass, tin/zinc-plated.
Shaft, Cover, Stop Plate, Retaining Ring,
Through Bolts, Shaft Extension, Stop Arm,
ThrustWashers,CoverPlateandRearSupport
Plate, Lockwashers and Nuts: Stainless steel
Detent Balls: Steel, nickel-plated
Contact Resistance: After 25,000 cycles of
operation, 50 milliohms maximum
The Series 08M and 09M also meet the
requirementsofMIL-DTL-3786SR13formoisture
resistance, stop strength, rotational torque,
vibration (10 to 2,000 cps), medium and high
shock, salt spray, explosion, thermal shock (-
65°C to 85°C) and terminal pull. ꢀhen tested at
sea level, 25°C and 68% relative humidity with
failure criteria of 50 milliohms maximum contact
resistanceand500Vacbreakdownvoltage,these
switches will make and break 250 mA at 28 Vdc
inductive (250 millihenries): 1/2 amp: at 28 Vdc
resistive: 1/2 amp; at 115 Vac: 60 ꢃz resistive for
10,000 cycles of operation.
Insulation Resistance: 1,000 megohms
minimum between terminals and shaft
Voltage Breakdown: 1,000 Vac initially
(500 Vac or better after most environmental tests)
Life Expectancy: 50,000 mechanical cycles of
operation. Note: Actual life is determined by a
number of factors, including electrical loading,
rate of rotation and environment, as well as
maximumcontactresistance,minimuminsulation
resistance and minimum voltage breakdown
required at the end of life.
Detent Springs: Tinned music wire
Terminals, Stator (Base) Contacts and
Common Plate: Brass, gold plate .00001"
minimum over silver plate .0003" minimum
Rotor Contact: Silver alloy, gold-plated .00001"
minimum
Mounting Hardware: Two mounting nuts .062"
(1,57) thick by .312" (7,92) across flats and one
internal tooth lockwasher are supplied with this
switch.
Mounting Nuts, Washers: Brass, tin/zinc-
plated and or stainless steel.
Electrical Ratings
Military Qualified
Materials and Finishes
Standard Style
SwitchBases:Melamineper(MIL-M-14)ASTM-
D-5948
Cover,DeckSeparatorsandEndPlate:Phenolic
per (MIL-M-14) ASTM-D-5948
Rotor Mounting Plate: Thermoplastic
Mounting Bushing: Brass, tin/zinc-plated.
Shaft, Retaining Rings, Through Bolts, Shaft
Extension, Stop Washers, Stop Arm, Thrust
Washers, Nuts, CoverPlateandRearSupport
Plate: Stainless steel
Qualified to the following MIL-DTL-3786/13
Circuit Values: (Also see Standard Style
description.) The Series 08M and 09M have been
tested to meet the requirements of MIL-S-3786,
Style SR13, the majority of which are listed. At
85°C, approximately 68% relative humidity and
sealevelpressure, theswitcheshavebeentested
to make and break the following loads, as stated
in MIL-DTL-3786/SR13: 125 milliamperes at 28
Vdcresistive:75milliamperesat115Vacresistive.
ADDITIONAL CHARACTERISTICS
Standard Style and Military Qualified
Contacts: Shorting or Non-shorting contacts
available in 30°, 36° and 45° angle of throw rotary
switches. Non-shorting contacts available in 60°
and 90° angle of throw switches. All are wiping
contacts with over 100 grams of contact force.
Stop Strength: 12 lb-inches minimum
Rotational Torque: 8-64 oz-in depending upon
the number of poles per deck and the number of
decks
Extended Studs: Switches of six decks or more
have longer studs with extra stud nuts for
recommended double end mounting.
Detent Balls: Steel, nickel-plated
The switches have also been tested at reduced
barometric pressure (70,000 feet), 25°C at
approximately 68% relative humidity to make and
break the following loads as stated in MIL-DTL-
3786/SR13. 50 milliamperes 28 Vdc resistive; 20
milliamperes 115 Vac resistive. ꢀhen tested to
the above loads at the stated conditions, the
Series 08M and 09M switches meet the following
life-limitingcriteriaafter25,000cyclesofoperation
in accordance with MIL-DTL-3786.
Detent Springs: Tinned Music wire
Terminals, Stator (Base) Contacts and
Common Plate: Brass, gold plate .00001"
minimum over silver plate .0003" minimum
Rotor Contact: Silver alloy, gold-plated .00001"
minimum
Mounting Hardware: Two mounting nuts .062"
(1,57) thick by .312" (7,92) across flats and one
internal lockwasher are supplied with switch.
Lockwasher: Stainless steel
Mounting Nuts, Washers: Brass, tin/zinc-
plated and or stainless steel.
Rotary
20
Grayhill, Inc.
• 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
