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HEIGHT GAGES AND ACCESSORIES
Standard Reference Bars
These Standard Reference Bars are invaluable for use in checking table movement of machine tools, accuracy of vernier height gages, surface plate transfer measurement and for final inspection of precision machine tools and coordinate measuring machines.

The "channel design" places additional measuring pads at appropriate points over the length of the bar as reference points for x, y, and z axis measurements. Channel design permits use of the bar on its base (vertical), or, on its back, or either side (horizontal). The alternating gage block jaws and spacer blocks are permanently wrung and fastened together to form 1" increments for inch bars and 25mm increments for metric bars.

A special bushing arrangement allows the master stack to conform to thermal conditions prevailing during use, thus providing a true master even under less than perfect laboratory conditions. Mating surfaces are treated during assembly to prevent corrosion.

Non-standard lengths and mesuring increments are available on special order. A Certificate of Calibration included. All models are furnished with a storage case.

Specifications
Description
Inch System
Metric System
Tolerance (Stack) expressed in µin. expressed in µm
Maximum

Minimum

2.5L +10 in inches

-10

.00025L + .25 in mm.

-.25

Parallelism: Gage surfaces to base and each other 15 µin. 0.4 µm
Uncertainty of calibration 10 + 2.0L in inches

expressed in µin.

.25 + .002L in mm

expressed in µm

Standard Reference Bars are available in 12", 19", 25" and 49" lengths as well as 300, 500, 650, 950 and 1250mm lengths. For more information on reference bars, contact our sales department at 440-835-0001 (phone), 440-892-9555 (fax) or via e-mail at sales@starrett-webber.com.
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