b'e lectronicb oreg ages781a ccu b oree lectronic b ore g ages b oreg agem easuringt ips( witHo utput ) Whether to use a two-point or three-point contact .080"-8"/2-200MM measuring tool is usually a matter of preference, but AccuBore is a high-quality, trigger-activated, two-point and three-pointindustry 4.0 there are some differences.contact bore gaging system with extended range. Its convenient single- A two-point contact rod-type inside micrometer is usually hand operation provides speed and control. Simply squeeze the trigger,lighter, easier to handle, and more versatile over long insert the gage into the bore and release the trigger for an instant readingranges from approximately 6-107" (150-2700mm).from the large, easy-to-read digital display. Anytwo-pointcontactmicrometer,regardlessof aGes oreWhatmakesAccuBoresuperiortoothergagesarefeaturesliketherange, can probe a hole better to find the geometry mechanically-drivenparallelanvilswhichextendsimultaneously,of that hole than a three-point contact. establishing a more true alignment to the axis of the bore. This providesMost three-point contact tools have setting rings to G Bconsistent pressure, resulting in more accurate readings than models withensure accuracy. If you desire very close tolerance spring-driven contacts which are subject to pressure variations. work with two-point contact inside micrometers, it is Speedandconveniencearefurtherenhancedbytherepositionablerecommended that they be set to a ring gage or to an AccuBore indicator, which may be swiveled and rotated for left, rightoutside micrometer.hand or even vertical viewing. The gage also features a set of "Go/No- A three-point contact micrometer has an advantage Go" lights in the readout display that quickly indicates whether a borein that it can be seated in position more quickly than measurement is within a preset tolerance. a two-point contact tool. F eatures UsuallythesetoolscanalsobereadtoafinerEquippedwithanRS232output-idealforusewithDataSureaccuracy. The three-point tool will tell the maximum Wireless Data Collection System true diameter that can enter the hole a little fasterWireless capability than a two-point contact tool.Single-hand operation with right- and left-hand viewing flexibility Micrometer heads used in these tools are accurateLarge, easy-to-read display to .0001" or 0.002mm, but overall accuracy onEnhanced wear life with carbide-faced contactsavailable fromtools that add rods is dependent on good practice 1/2" to 8" and technique. Convenient "Go/No-Go" tolerance indicator lights To ensure accuracy, these practices should be followed: True alignment with mechanically-driven parallel anvilsAlways make sure that there are no specks ofResolution .00005" (0.001mm) dirt between the clamping surfaces of the rodsAccuracy of up to .00015" (0.004mm) and micrometer heads Push button inch/metric conversionTighten all rods uniformly, not too tightly, not tooPreset and preset recall loosely, but a fairly firm assemblyHold, max/min and zeroing capabilitiesAssemblinglongsectionsshouldbedone vertically or, with support, horizontally Blind bore measurement is standard for .50" (12.7mm) and aboveBecause temperature can affect long rods usedSpecializedheadsavailableforthread,grooveandothernon- in these tools, they should be assembled in the standard measurements on request same environment in which they will be used781BXTZ-138starrett.com 45'