optical and mechanical encoders grayhill, inc. ? 561 hillgrove avenue ? lagrange, illinois 60525-5997 ? usa ? phone: 708-354-1040 ? fax: 708-354-2820 ? www.gr ayhill.com mechanical encoders 0.125" diameter shaft all dimensions and rear view not shown for the .250" diameter shaft type are the same as the .125" diameter shaft type. dimensions in inches (and millimeters) rear mounting plate stamping indicates coded output terminals, not decimal positions. grayhill part number and date code marked on label. customer part number marked on request. code and truth table output decimal position terminal 0 1 2 3 4 5 6 7 8 9 1 * **** 2**** 4**** 8** l indicates contact is made to the common. specifications electrical rating rated: to make and break 125 ma at 30 vdc resistive at standard conditions life expectancy: 25,000 cycles at rated load; 50,000 cycles mechanical. for ratings at different loads and conditions, contact grayhill. contact resistance: 100 milliohms maximum (50 milliohms initially) insulation resistance: as measured between mutually insulated parts initially: 50,000 megohms minimum after life: 10,000 megohms minimum voltage breakdown: 500 vac between mutually insulated parts carry current: these switches will carry 3 amperes with a maximum contact temperature rise of 20c. options shaft and panel seal shaft is sealed by o-ring inside the bushing; panel is sealed by o-ring at the base of the bushing. seals do not alter dimensions as shown in the drawing when switch is mounted. panel seal is silicone rubber. shaft seal is an o-ring per mil-p-5516b. shaft and panel seal is not available on adjustable stop switch. additional characteristics rotational torque: 8 to 16 oz-in. contacts: non-shorting wiping contacts shaft flat orientation: as shown in the drawing, switch would provide a decimal 1 output. materials and finishes base: diallyl per mil-m-14 rotor mounting plate: thermoplastic. rotor contact: phosphor bronze, gold-plated 30 microinches minimum terminals: brass, gold plate (20 microinches) minimum over silver plate (300 microinches) minimum additional materials: other switch materials and finishes are the same as listed for the standard switch. see standard switch. adjustable stop switches adjustable stop switch lets you limit the number of positions. remove and relocate pins in the front plate. a sticker holds the pins in place. with the exception of holes in the front plate, all dimensions, ratings, and characteristics are the same as the other series 71 coded switches. for diagrams, see standard switch. available from your local grayhill distributor. for prices and discounts, contact a local sales office, an authorized local distributor or grayhill. ordering information shaft diameter part and description number 1/8" continuous rotation 71AY23401 1/8" cont. rot., sealed 71ay23402 1/4" continuous rotation 71by23403 1/4" cont. rot., sealed 71by23404 1/8" adjustable stops 71ad36-3118 1/4" adjustable stops 71bd36-3119 series 71 binary code features ? 1 / 4 " or 1 / 8 " shaft diameters ? 25,000 cycles at 125 ma ? optional seal versions ? adjustable stop versions of bushing flats c l .094 .010 (2,39 0,25) of shaft flat c l .203 .005 (5,16 0,13) .687 .015 (17,45 0,38) dia. .562 .015 (14,27 0,38) 1/4 32-unef-2a thread .125 + .001/ C.002 (3,18 + 0,03/ C0,05) .031 (0,79) ref. .761 .046 (19,33 1,17) .312 .020 (7,92 0,51) .375 .020 (9,53 0,51) .250 .020 (6,35 0,51) .500 .015 (12,7 0,38) dia. see detail a .750 .020 (19,05 0,51) over terminals grayhill 81073 8 1 4 c 2 72? shaft is shown in position 1 of bushing keyway c l .219 .004 (5,56 0,10) of shaft flat c l 72 .250 + .001/ C.002 (6,35 + 0,03/ C0,05) 3/8 32-unef-2a thread bushing keyway .066 .002 (1,68 0,05) wide by .036 .003 (0,91 0,08) from a .375 (9,53) diameter detail a .068 .005 (1,73 0,13) .034 .003 (0,86 0,08) shaft is shown in position 1 0.250" diameter shaft encoder 9
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