Single Deck Rotary Switches
SERIES 24
1" Diameter, 1 Amp,
.580" Behind Panel
FEATURES
• Positive Detent Provides Operator
Feedback
• Stainless Steel or Plastic Shaft
Option
• Unsurpassed Performance in
Numerous Applications
DIMENSIONS
Solder Lug
In inches (and millimeters)
PC Mountable
.250 ± .020
(6,35 ± 0,51)
.578 ± .030
(14,68 ± 0,76)
TERMINAL 9 IN LINE
WITH KEYWAY
.109 ± .015
(2,77 ± 0,38)
Circuit Diagram
Solder Lug and PC Mount
(Switch is viewed from shaft end.)
Note: Common Terminal is
located above Base Terminal 10.
7
8
9
C
L
OF
BUSHING
KEYWAY
C1
.312 ± .020
(7,93 ± 0,51)
.250 ± .020
(6,35 ± 0,51)
.250 + .001/ – .002
(6,35 + 0,03/ – 0,05)
DIA.
1.015 ± .015
(25,78 ± 0,38)
DIA.
BUSHING KEYWAY
.066 ± .002 (1,68 ± 0,05) WIDE
.036 ± .005 (0,91 ± 0,13) DEEP
FROM THE .375 (9,53) DIAMETER
.531 ± .020
(13,49 ± 0,51)
APPROX.
.750 (19,05) DIA. OVER
TERMINAL ENDS AT
INSERTION END
6
5
10
4
3
2
1
3/8-32UNEF-2A
THREAD
.564 ± .020
(14,33 ± 0,51)
ONE POLE
Typical Terminal Detail
(PC
Mount)
BASE TERMINAL
.187 ± .005
(4,75 ± 0,13)
.020 ± .002
(0,51 ± 0,05)
COMMON TERMINAL
.016 ± .002
(0,41 ± 0,05)
.050 ± .002
(1,27 ± 0,05)
.096 ± .003
(2,44 ± 0,08)
Terminal Location
(PC Mount)
.525
(13,34)
TYP.
.363 (9,22)
TYP.
.294 (7,47)
TYP.
.347 (8,81)
TYP.
.213
(5,41)
TYP.
.113 (2,87)
TYP.
COMMON
36° ± 5°
.937 ± .020
(23,80 ± 0,51)
DIA.
36° TYP.
REF.
Rotary Switches
.219 ± .005
(5,56 ± 0,13)
Grayhill part number and date code marked on label. Customer part number marked on request.
SPECIFICATIONS
Electrical Rating
Rated:
To make and break the following loads:
1 amp at 115 Vac, resistive; 0.5 amp at 220
Vac resistive; 1/4 amp, 115 Vac inductive; 1/50
amp, 115 Vdc inductive; 1/10 amp, 6 to 28 Vdc
inductive; 1/10 amp, 115 Vdc resistive; 1 amp,
6 to 28 Vdc resistive; to carry 10 amps continu-
ously.
Contact Resistance:
10 milliohms initial. Af-
ter 25,000 cycles of operation 20 milliohms
maximum.
Insulation Resistance:
50,000 Mohms
minimum initially
Voltage Breakdown:
1,000 Vac, (500 Vac, or
better after most environmental tests).
Life Expectancy:
100,000 mechanical cycles
of operation normally. NOTE: Actual life is
determined by a number of factors, including
electrical loading, rate of rotation, and environ-
ment, as well as maximum contact resistance,
minimum insulation resistance, and minimum
voltage breakdown required at the end of life.
Retaining Rings, Stop Arms, and Thrust
Washers:
Stainless steel
Detent Balls:
Steel, nickel-plated
Shafts:
Stainless steel, or plastic
Detent:
Opposing spring and ball in a hill and
valley raceway.
Detent Springs:
Tinned music wire
Terminals (except common):
Brass, tin plated.
Rotor Contact:
Steel shaft version—phosphor
bronze, silver-plated .0003" minimum. Plastic
shaft version—silver alloy.
Stator (Base) Contact:
Brass, silver-plated
.0003" minimum
Common Plate, including Solder Lug or PC
Tab:
Brass, silver-plated .0003" minimum
Rotor Mounting Plate:
Nylon fabric-based
laminated phenolic per MIL-T-15047
Mounting Nut:
Brass, tin/zinc-plated or
stainless steel.
STANDARD OPTIONS
Special Terminals
RFI Grounding
Not available through distributors.
ORDERING INFORMATION
Switches are single deck, one pole switches of
2 to 10 positions. They have plastic or steel
shaft, with solder lug or PC terminals, with either
shorting or non-shorting contacts (plastic shaft
PC mount in non-shorting only). Ten position
switches have continuous rotation; fixed stop
switch with a metal shaft is available by special
order. Base part numbers are as follows:
Lug style, steel shaft: 24001-X*
Lug style, plastic shaft: 24B36-01-1-X*
PC style, steel shaft: 24878-X*
PC style, plastic shaft: 24P36-01-1-X*
The X is replaced with the number of positions
required (02, 03, etc.) Complete the part num-
ber by adding N for non-shorting contacts or S
for shorting contacts.
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Office, an authorized local Distributor or Grayhill.
Additional Characteristics
Stop Strength:
12 in-lbs
Rotational Torque:
12 in-ozs
Shaft Flat Orientation:
Opposite point of con-
tact (See circuit diagram.)
Environmental:
These switches have passed
the following environmental testing: Altitude
and temperature, 100 hour salt spray; Vibration
10 to 500 cps; Shock 30-G; Humidity; Fungus.
PC Mount:
PC Switches are furnished with 10
base terminals for mounting purposes.
Materials and Finishes
Switch Base:
Melamine per (MIL-M-14)
ASTM-D-5948
Cover, Stop Washers, Bushing:
Brass, tin/
zinc-plated
Contacts:
Both shorting and non-shorting
wiping contacts have over 300 grams
contact force.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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17
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