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  5. Optical Flat Parallel Set (Micrometer Calibration) 90mm 1964s RARE

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Optical Flat Parallel Set (Micrometer Calibration) 90mm 1964s RARE

£86.33 Buy It Now, £47.82 Shipping, 30-Day Returns, eBay Money Back Guarantee
Seller: milim9 ✉️ (625) 97.3%, Location: Balti, Balti, GG, Ships to: EUROPE, Item: 156149868087 Optical Flat Parallel Set (Micrometer Calibration) 90mm 1964s RARE. 100%Original NEW!!!     

          

PM-65 plate plane-parallel glass is used for checking the interference method, the flatness and parallelism of surfaces of surfaces of micrometers (smooth and lever) and clamps (lever and indicator). Plane-parallel glass plates PM-65 have the form of straight circular cylinders with polished end faces that are measuring. Cylindrical surface of the plates shall be brushed, with the exception of sites intended for the application of labels. Specifications of PM-65: The measuring range of micrometers and staples from 50 mm to 75 mm. Accuracy class - 2. The actual size deviation is ±10 µm. Deviation of the parallelism of the measuring surfaces - 0.8 microns. The deviation of flatness of the measuring surfaces is ±0.1 µm. Local flatness - ±0,03 µm. The material of manufacture of the PM-65 - glass brand K8 GOST 3514-76. Dimensions: - diameter - 40 mm; height - 65 mm. Weight - 209 g The operating conditions of the PM-65: Working temperature - 20±5° C. Relative humidity - less than 80%. The size of the plate for calibration of micrometers is determined by the shortest distance between the measuring planes. PW-65 has been widely used in tooling industry, in machine engineering, instrument engineering, machinery and many other industries.

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  • Condition: New other (see details)
  • Condition: New with storage-as pictured
  • Brand: USSR
  • Country/Region of Manufacture: Russian Federation
  • Micrometer Type: Depth Micrometer
  • Model: Parallel Set

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  •  Popularity - 2 watchers, 0.1 new watchers per day, 14 days for sale on eBay. Good amount watching. 0 sold, 1 available.
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  •  Seller - 625+ items sold. 2.7% negative feedback. Good seller with good positive feedback and good amount of ratings.

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