Click for larger image

The HP Series Hard Points are used in conjunction  with our BEX Series extension bars and various SMR holders having 1/4" shafts.  This type of  assembly (see photo below) is often used to locate and specify various points using a sphere-fit routine*.  The HP is handy for targeting scribe lines, edges, or other points of interest on surfaces or contours.  It is especially useful for measuring points which are obscured from view.  Using the HP with its targeting assembly to measure hidden points allows you to avoid making additional tracker moves and subsequent rebundles, thereby saving time and potential error buildup.  These adapters make more efficient use of your laser tracker equipment while maintaining the accuracy needed for most tasks.

	The HP is available with an English or metric unit offset.  It includes a 6-32 set screw at the bottom of the 1/4" hole (see sketch at left).  This is used to secure the HP to our BEX extension bars.	Click for larger image
	Model "A" Offset HP 1.000" HP-25MM 25 mm

*A "sphere fit rod" assembly (above right) may be constructed from a BEX bar extension, an SMR adapter, and an HP Hard Point.  It is used to measure a number of points which are all a given distance away from one particular point of interest, making that point of interest the center of an arbitrary sphere.  Then, a sphere-fit routine is commonly used to calculate that center point.  In the picture, the HP is centered on a scribe line.