| Established in 1952 | |
Page: 1640 |
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The Runt™ fills the need for a shorter, more petite, probe characterization sphere for smaller Coordinate Measuring Machines ( CMM ) and for other special applications. The standard spherical diameter of the master ball is one inch (1.00", 25.4 mm ). The Runt™ is also available in a wide range of master ball diameters of both English and metric sizes to satisfy all requirements. |
 Solidworks rendering of the Runt |
The overall height of the Runt™ equipped with a 1.00 inch ( 25.4mm ) diameter sphere is only 2 3/8 inch ( 2.375", 60.3 mm), which is a full inch shorter than the standard versions. Although manufactured to the highest quality standards the Runt™ is sold for a very reasonable price. The quality of the sphere for the standard version of the Runt (Part Number PM-PB-B100-R) is held to a five microinch (127mm) sphericity which meets the quality requirements for the.revised ANSI-B89.4.1- 1997 specification for the "Performance Evaluation of Coordinate.Measuring Machines". The quality of the sphere for the Ultra Precision version of the Runt™ (Part Number PM-UB-B100-R) is two and one half microinch ( 63.5nm ) sphericity which is state of the art for calibrating the test probes of the highest quality machines. |
In keeping with the very rugged design, the ball is not simply glued on top of the post, but is reinforced by a long metal pin that penetrates deep inside the ball and the post so that a minor tap will not send the ball rolling across the room. This hole is drilled in the ball by using special computer controlled Electrical Machining (EDM) technique which does not disturb the original quality of the ball.
There is an MlOX1.5 threaded hole, in the base of the Runt™, which is used to rigidly fasten it to any mating surface.
Through the use of our Dual Threaded Adapter Screws, (see Technical Data Sheet CMM-14 Table #1.) it can be adapted to the thread size of any C.M.M. table.
The Runt™ is compatible with the standard 1 1/4 inch ( 31.75 mm) diameter extensions of either the 3 inch (7.6 cm) long (Part# P-EP-3) or the 6 inch (15.2cm) long (Part# P-EP-6) (see Technical Data Sheet CMM-12.) the four inch diameter Platform, (Part# PLT-4) (see Technical Data Sheet CMM-6A.) the four inch diameter Magnetic Platform (Part# M-PLT-4) (see Technical Data Sheet CNC-2.) or on the Abalone vacuum chuck (Part# 10140)(see Technical Data Sheet CMM-13, Page 1.).
There is a 3/16 inch (4.8mm) diameter hole drilled at right angles through the post of the Runt™. A pin placed through this hole is used as a wrench to rotate the post to securely tighten or remove it.
Except for the shorter overall length, this device has the same characteristics as the standard version of the post mounted calibration spheres (see Technical Data Sheet CMM-7 Page1 and 2.)
| Part # | Ball Diameter | Ball Material | Price |
Purchase | |
| Click link for IGES file | |||||
| 25.4001 mm | 1.0000" |
Hardened Stainless Steel, The Runt |
$198.77 |  |
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| Post Length - 2.375" (60.33 mm), Post Diameter - 1.250" (31.75 mm) | |||||
|---|---|---|---|---|---|
| Part | Description |
| Click for IGES file | |
| PM-UB-B100R | The Runt, shorter probe calibration sphere |
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Specification Files
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