Grayhill Single Deck Rotary Switches 51 Series - Manual (Page 3)

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
Ш0.254 Ш0.280
Ш0.380
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