Multi-Deck Rotary Switches
MILITARY QUALIFIED
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
not affect switch performance can also be marked
as qualified product–contact Grayhill.
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. Grayhill can provide complete specification
drawings. Qualified switches can be ordered by
the Grayhill number or the "M" number; they will
be marked per MIL-DTL-3786/13.
Front view shows terminal location of
Series 09, 30° angle of throw.
Transpose rear view for terminal location
of other angles of throw.
.260 ± .015
(6,60 ± 0,38)
Series 09
30° Angle of Throw
.562 ± .020
(14,27 ± 0,51)
DIA.
.781 ± .020
(19,83 ± 0,51)
OVER TERMINALS
0
9
Series 08
36° Angle of Throw
.718 ± .020
(18,24 ± 0,51)
OVER
TERMINALS
.500 ± .020
(12,7 ± 0,51)
DIA.
8
GRAYHILL
C
OF NON-TURN
L
TAB
GRAYHILL
1
12
10
9
1
11
8
7
6
7
6
5
5
15°
4
SEE NOTE
30°
.094 ± .010
(2,38 ± 0,25)
Note:
Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit diagrams.
Terminal Detail
.034 ± .003
(0,86 ± 0,08)
.068 ± .005
(1,73 ± 0,13)
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.
Contact Resistance:
After 25,000 cycles of
operation, 50 milliohms maximum
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
maximum contact resistance, minimum insulation
resistance and minimum voltage breakdown
required at the end of life.
Contact Resistance:
50 milliohms maximum after
life
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.
The Series 08M and 09M also meet the
requirements of MIL-DTL-3786 SR13 for moisture
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. When tested at
sea level, 25°C and 68% relative humidity with
failure criteria of 50 milliohms maximum contact
resistance and 500 Vac breakdown voltage, 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 Hz resistive for
10,000 cycles of operation.
Materials and Finishes
Military Qualified
Deck Separators, End Plate and Switch Bases:
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,
Thrust Washers, Cover Plate and Rear Support
Plate, Lockwashers and Nuts:
Stainless steel
Detent Balls:
Steel, nickel-plated
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
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
sea level pressure, the switches have been tested
to make and break the following loads, as stated
in MIL-DTL-3786/SR13: 125 milliamperes at 28
Vdc resistive: 75 milliamperes at 115 Vac resistive.
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. When tested to
the above loads at the stated conditions, the
Series 08M and 09M switches meet the following
life-limiting criteria after 25,000 cycles of operation
in accordance with MIL-DTL-3786.
Materials and Finishes
Standard Style
Switch Bases:
Melamine per (MIL-M-14) ASTM-
D-5948
Cover, Deck Separators and End Plate:
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, Cover Plate and Rear Support
Plate:
Stainless steel
Detent Balls:
Steel, nickel-plated
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.
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.
Rotary
20
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
3
2
36°
1
4
3
2
Rotary Switches
GRAYHILL [ GRAYHILL, INC ]
