| Product Description |
Starret Weber Guage Croblox 36-sided optical polygon SR# 330762
Specifications:
Diameter across corners - 6.092
Height - .625"
Angle spacing degrees - 10
Target Size - 17/32 x 17/32
Target area sq. in. - .281
Flatness and parallelism - Top and bottom - .00005"
Maximum Pyramidal error - +/- 15 seconds
Grade - reference 0
Target area flatness - 1µin. (.03 m)
Determination of accuracy - .25 sec.
Maximum Deviation of Faces from Nominal 0-18 -1.0 sec., 19-36 - 2.5 sec.
Chrome carbide polygons provide a hardness of Rockwell 71-73C and a corrosion resistance 10 to 20 times that of 18-8 stainless steel resulting in lifetime accuracy. The last quoted price from Starrett was approx. $15,000 however manufacture was suspended due to a lack of material of suitable size. Make this the "Jewel" of your calibration lab. The condition is excellent. Calibration is available for approx. $750.00. Includes a Storage case.
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