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The 4 inch platform ( part number PLT-4 ) is a universal mounting tool. It is used to securely couple a variety of measuring devices to the machine under test. Among these devices are all of the CMM probe characterizing spheres on a post including the Mini Ball Bar (Dumbbell) ™ (see Technical Data Sheets CMM-7 and CMM-9).
The 45 degree Angle block (Part Number BLK 45) is designed for use with the four inch ( 101.6 mm ) platform . For performance evaluation of Computer Numerically Controlled machining centers, it will hold the standard 1.00 inch ( 25.4mm ), part number PM-UB-B100, diameter Ultra Precise Test Sphere on the 1-1/4 inch (31.75mm) diameter post. It will also hold "The Big One", a two inch (50.8mm) diameter Test Sphere mounted on a 2 inch (50.8mm) diameter by 2-1/2 inch (63.5mm) high post (Part Number PM-PB-B200).
All of these tools are coupled to the platform through a M10 x 1.5 diameter threaded stud. The platform has a tapped hole directly in the center and one near the outer edge of the top face. All of the accessories have corresponding tapped holes in them.
In addition to the central tapped hole, there are three 1/4 inch ( 6.35mm ) diameter holes drilled through the platform and counter bored from the bottom. These three holes form the vertices of an equilateral triangle. They are used to mount three 3/4 inch ( 19.05mm ) diameter truncated and tapped spheres to form the three Ball Kinematic Platform ( Part Number 3B-KM, Technical Data Sheet CMM-4) used in Ball Bar (Dumbbell) evaluation of Coordinate Measuring Machines.
This platform is manufactured from a free machining low alloy carbon steel. It may be easily modified to provide extra holes, threads, or other details. Prompt delivery of any modified configuration will be supplied at reasonable cost.
This robust steel platform is four inches ( 101.6mm ) diameter and 1-1/2 inch ( 38.1mm ) thick. It weighs over five pounds ( 2.27kg ).
There is a recess machined in its base that leaves an annular ring around the edge. This ring is precision lapped flat to form an excellent coupling to a CMM or machine tool table.
There is a drilled and counter bored hole through the platform that will accept a 3/8 inch or a 10mm diameter socket head cap screw. This screw will securely clamp the platform to its mating surface.
The 4" platform is supplied with an attractive black oxide finish which helps to retard corrosion. Other finishes are available on special order.
