1
Optical and Mechanical
Encoders
8
Mechanical Encoders
SErIES 71
binary Code
fEa TurES
1 1
/4" or /8" Shaft Diameters
25,000 Cycles at 125 mA
Optional Seal Versions
Adjustable Stop Versions
DIMENSIONS in inches (and millimeters)
.761 .046
.312 .020
0.125"
(7,92 0,51) (19,33 1,17)
Diameter
C
OF SHAFT L
.375 .020
.500 .015
Shaft
.031 (0,79)
.094 .010 FLAT
(9,53 0,51)
(12,7 0,38)
REF.
(2,39 0,25)
Rear mounting
.250 .020
DIA.
72
(6,35 0,51)
plate stamping
indicates CODED
output terminals,
.562 .015
C not decimal posi-
(14,27 0,38)
L
OF
tions.
BUSHING
FLATS
SHAFT IS
.125 + .001/ .002
SHOWN
(3,18 + 0,03/ 0,05)
IN POSITION 1 .203 .005
SEE
.750 .020
(5,16 0,13)
DETAIL A
(19,05 0,51)
1/4 32-UNEF-2A
.687 .015 OVER TERMINALS
THREAD
(17,45 0,38)
0.250"
DIA.
Diameter
C
3/8 32-UNEF-2A
Shaft OF SHAFT L
.219 .004
THREAD
FLAT
(5,56 0,10)
72
Detail A
C
L
OF
SHAFT IS
BUSHING
.034 .003
SHOWN
KEYWAY
(0,86 0,08)
IN POSITION 1 .250 + .001/ .002
.068 .005
(6,35 + 0,03/ 0,05) BUSHING KEYWAY
.066 .002 (1,68 0,05) WIDE (1,73 0,13)
All dimensions and rear view not shown for
BY .036 .003 (0,91 0,08)
the .250" diameter shaft type are the same
FROM A .375 (9,53) DIAMETER
as the .125" diameter shaft type.
Grayhill part number and date code marked on label. Customer part number marked on request.
CODE aND TruTh TablE OPTIONS
Shaft and Panel Seal adjustable Stop Switches
Output Decimal Position
Shaft is sealed by o-ring inside the bushing; Adjustable stop switch lets you limit the number of
Terminal 0 1 2 3 4 5 6 7 8 9
panel is sealed by o-ring at the base of the positions. Remove and relocate pins in the front
1 l l l l l
plate. A sticker holds the pins in place. With the
bushing. Seals do not alter dimensions as shown
2 l l l l
in the drawing when switch is mounted. Panel exception of holes in the front plate, all dimensions,
4 l l l l
seal is silicone rubber. Shaft seal is an o-ring ratings, and characteristics are the same as the
8 l l
per MIL-P-5516B. Shaft and panel seal is not other Series 71 coded switches. For diagrams,
l Indicates contact is made to the common.
available on adjustable stop switch. see Standard Switch.
SPECIfICa TIONS OrDErING INfOrMa TION
Electrical rating additional Characteristics
Shaft Diameter Part
rated: To make and break 125 mA at 30 Vdc
rotational Torque: 8 to 16 oz-in.
and Description Number
resistive at standard conditions Contacts: Non-shorting wiping contacts
1/8" Continuous Rotation 71aY23401
life Expectancy: 25,000 cycles at rated load;
Shaft flat Orientation: As shown in the
1/8" Cont. Rot., Sealed 71aY23402
50,000 cycles mechanical. For ratings at different
drawing, switch would provide a decimal 1
1/4" Continuous Rotation 71bY23403
loads and conditions, contact Grayhill. output.
1/4" Cont. Rot., Sealed 71bY23404
Contact resistance: 100 milliohms maximum
1/8" Adjustable Stops 71aD36-3118
(50 milliohms initially)
Materials and finishes
1/4" Adjustable Stops 71bD36-3119
Insulation resistance: As measured between
base: Diallyl per MIL-M-14
mutually insulated parts
available from your local Grayhill
rotor Mounting Plate: Thermoplastic.
Initially: 50,000 megohms minimum
Distributor.
rotor Contact: Phosphor Bronze, gold-plated
After Life: 10,000 megohms minimum
For prices and discounts, contact a local
30 microinches minimum
Voltage breakdown: 500 Vac between mutually
Sales Office, an authorized local Distributor or
Terminals: Brass, gold plate (20 microinches
insulated parts
min) over silver plate (300 microinches min) Grayhill.
Carry Current: These switches will carry 3
additional Materials: Other switch materials
amperes with a maximum contact temperature
and finishes are the same as listed for the
rise of 20C.
standard switch.
Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.com
2
C
GRAYHILL
81073
4X-ON Electronics
Largest Supplier of Electrical and Electronic Components
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