grayhill, inc. ? 561 hillgrove avenue ? lagrange, illinois 60525-5997 ? usa ? phone: 708-354-1040 ? fax: 708-354-2820 ? www.gr ayhill.com rotary switches single deck rotary switches 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. 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 part number and date code marked on label. customer part number marked on request. typical terminal detail (pc mount) terminal location (pc mount) solder lug pc mountable dimensions in inches (and millimeters) .937 .020 (23,80 0,51) dia. .219 .005 (5,56 0,13) 36 5 .564 .020 (14,33 0,51) common approx. .750 (19,05) dia. over terminal ends at insertion end .109 .015 (2,77 0,38) .531 .020 (13,49 0,51) .050 .002 (1,27 0,05) .096 .003 (2,44 0,08) base terminal .020 .002 (0,51 0,05) common terminal .016 .002 (0,41 0,05) .187 .005 (4,75 0,13) 7 8 9 10 1 2 3 4 6 5 c l of bushing keyway one pole c 1 circuit diagram solder lug and pc mount (switch is viewed from shaft end.) note: common terminal is located above base terminal 10. 36 typ. ref. .113 (2,87) typ. .213 (5,41) typ. .347 (8,81) typ. .363 (9,22) typ. .525 (13,34) typ. .294 (7,47) typ. .250 + .001/ C .002 (6,35 + 0,03/ C 0,05) dia. 1.015 .015 (25,78 0,38) dia. terminal 9 in line with keyway bushing keyway .066 .002 (1,68 0,05) wide .036 .005 (0,91 0,13) deep from the .375 (9,53) diameter 3/8-32unef-2a thread .578 .030 (14,68 0,76) .250 .020 (6,35 0,51) .250 .020 (6,35 0,51) .312 .020 (7,93 0,51) series 24 1" diameter, 1 amp, .580" behind panel 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 versionphosphor bronze, silver-plated .0003" minimum. plastic shaft versionsilver 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. 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. 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 short ing 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. features ? positive detent provides operator feedback ? stainless steel or plastic shaft option ? unsurpassed performance in numerous applications rotary 17
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