781BXT AccuBore® Electronic Bore Gages with Output .080"-8"/2-200MM AccuBore is a high-quality, trigger-activated, two-point and three-point contact bore gaging system with extended range. Its convenient single-hand operation provides speed and control. Simply squeeze the trigger, insert the gage into the bore and release the trigger for an instant reading from the large, easy-to-read digital display. What makesAccuBore superior to other gages are features like the mechanically-driven parallel anvils which extend simultaneously, establishing a more true alignment to the axis of the bore. This provides consistent pressure, resulting in more accurate readings than models with spring-driven contacts which are subject to pressure variations. Speed and convenience are further enhanced by the repositionable AccuBore® indicator, which may be swiveled and rotated for left, right hand or even vertical viewing.The gage also features a set of "Go/No-Go" lights in the readout display that quickly indicates whether a bore measurement is within a preset tolerance. Fea tures • Bluetooth® capability • Single-hand operation with right- and left-hand viewing flexibility • Large, easy-to-read display • Enhanced wear life with carbide-faced contacts – available from 1/2" to 8" • Convenient "Go/No-Go" tolerance indicator lights • True alignment with mechanically-driven parallel anvils • Resolution .00005" (0.001mm) • Accuracy of up to .00015" (.004mm) • Push button inch/metric conversion • Preset and preset recall • Hold, max/min and zeroing capabilities • Blind bore measurement is standard for .50" (12.7mm) and above • Specialized heads available for thread, groove and other non-standard measurements on request • Output capability for Statistical Process Control (SPC) analysis. Download data via USB to a PC or RS232 connection. Bore Gage Measuring Tips Whether to use a two-point or three-point contact measuring tool is usually a matter of preference, but there are some differences. Atwo-pointcontactrod-typeinsidemicrometerisusually lighter, easier to handle, and more versatile over long ranges from approximately 6-107" (150-2700mm). Any two-point contact micrometer, regardless of range, can probe a hole better to find the geometry of that hole than a three-point contact. Most three-point contact tools have setting rings to ensure accuracy. If you desire very close tolerance work with two-point contact inside micrometers, it is recommended that they be set to a ring gage or to an outside micrometer. A three-point contact micrometer has an advantage in that it can be seated in position more quickly than a two-point contact tool. Usually these tools can also be read to a finer accuracy. The three-point tool will tell the maximum true diameter that can enter the hole a little faster than a two-point contact tool. Micrometer heads used in these tools are accurate to ±.0001" or 0.002mm, but overall accuracy on tools that add rods is dependent on good practice and technique. To ensure accuracy,these practices should be followed: • Always make sure that there are no specks of dirt between the clamping surfaces of the rods and micrometer heads • Tighten all rods uniformly, not too tightly, not too loosely, but a fairly firm assembly • Assembling long sections should be done vertically or, with support, horizontally • Because temperature can affect long rods used in these tools, they should be assembled in the same environment in which they will be used 781BXTZ-138 Electronic Bore Gages 204 B ore G ages New!