Micrometers
3-Wire Thread Measuring System • Fast and accurate method of thread measuring available for use with micrometer
Individual Holder and Wire Set
Wire holders and 3 thread measuring wires assembled for each thread pitch.
B
Micrometer with a graduation of .00005".
Vertically adjustable platform
for positioning and supporting threaded parts and plug gages between anvil of micrometer.
Locking clamp holds micrometer securely in place.
PD
M
156-106 Stand Assembly
Base Assembly
Compatible with micrometers with .25 in / 6.35 mm anvils & spindles.
W
Inch Order No. * 1, * 2
Metric Order No. * 1
Thread Per Inch
Thread Measuring Wire Diameter
mm Diameter
Inch Diameter
Pitch
PD = Pitch Diameter M = Measurement over wires W = Wire diameter C = Constant C = .86603 x Pitch (inches) -3W P.D. = M-C W = .57735 x P
64AAA201 64AAA202 64AAA203 64AAA204 64AAA205 64AAA206 64AAA207 64AAA208 64AAA209 64AAA210 64AAA211 64AAA212 64AAA213 64AAA214 64AAA215 64AAA216 64AAA217 64AAA218 64AAA219 64AAA220 64AAA221 64AAA222 64AAA223 64AAA224 64AAA225 64AAA226 64AAA227 64AAA228 64AAA229 64AAA230 64AAA231 64AAA232 64AAA233 64AAA234 64AAA235 64AAA236
64AAA251 64AAA252 64AAA253 64AAA254 64AAA255 64AAA256 64AAA257 64AAA258 64AAA259 64AAA260 64AAA261 64AAA262 64AAA263 64AAA264 64AAA265 64AAA266 64AAA267 64AAA268 64AAA269 64AAA270 64AAA271 64AAA272 64AAA273 64AAA274
120 100
.00481 .00577 .00601 .00642 .00722 .00802 .00902 .01031 .01155 .01203 .01312 .01443 .01604 .01804 .01925 .02062 .02138 .02221 .02406 .02624 .02887 .03208 .03608 .04124 .04441 .04811 .05020 .05249 .05774 .06415 .07217 .07698 .08248 .09623 .10497
.2mm .1155 .225mm .1299 .30mm .1732 .35mm .2021 .40mm .2309 .45mm .2598 .25mm .1443 .50mm .2887 .55mm .3175 .60mm .3464 .70mm .4041 .75mm .4330 .80mm .4619 .85mm .4907 .90mm .5196 1.00mm .5774 1.25mm .7217 1.50mm .8660 1.75mm 1.0104 2.00mm 1.1547 2.50mm 1.4434 3.00mm 1.7321 3.50mm 2.0207 4.00mm 2.3094
.00455 .00511 .00568 .00682 .00796 .00909 .01023 .01137 .01250 .01364 .01591 .01705 .01818 .01932 .02046 .02273 .02841 .03410 .03978 .04546 .05683 .06819 .07956 .09092
95 90 80 72 64 56 50 48 44 40 36 32 30 28 27 26 24 22 20 18 16 14 13 12 11 10
Applications • Measure set of thread plug gages and working thread plug gages. • Monitor the wear on working thread plug gages. • Monitor and control pitch diameter variation during thread fabrication. • Reduce measurement time to a fraction of the time normally taken using the traditional three wire method. • Use in conjunction with Go/No-go thread ring gages to control thread size to the most demanding specifications. • Determine out of roundness and taper that may exist in threaded parts. • Applications for preplating and post plating thread measurement.
*1 For 6.35mm Spindle Diameter holder only, add “H” suffix to Order No. (i.e. 64AAA201H)
11.5
Tolerance of Wires: • Diameter +/- .000010” • Roundness +/- .000010” • Surface finish 2 micro inches AA, lapped • Hardness HRC 59-64 • Certification of accuracy included • Traceable to NIST • Meets or exceeds all ANSI and ISO specs
9 8 7 6
7.5
5.5
5 .11547 * 1 For 6.35mm Spindle Diameter holder only, add "H" suffix to Order No. (i.e. 64AAA201H) * 2 For 8mm Spindle Diameter holder only, add “H8” suffix to Order No. (i.e. 64AAA201H8)
B-74
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