Technical Indicators

1. Excircle diameter: φ 80-φ 150mm;

2. Prism thickness: 17-20mm;

3. Rotating center aperture: φ25mm; Material: GCr15;

5. Hardness: HRC62-65;

6. Flatness of working face: Grade 0 (Grade II): ≤ 0.03um; Grade 1 (Grade III): ≤ 0.05um; Grade 2 (Grade 4): ≤ 0.1 um; [Customized class 00 (first class): ≤ 0.02 um;]

7,Flatness of datum plane: Grade 0 (Grade II): ≤ 1um; Grade 1 (Grade III): ≤ 1.5 um; Grade 2 (Grade 4): ≤ 1.5 um; [Customized Grade 00 (Grade I): ≤ 1um;]

8,Verticality of working surface to datum plane: Grade 0 (Grade II): ≤ ± 10 ″; Grade 1 (Grade III): ≤ ± 15 ″; Grade 2 (Grade 4): ≤ ± 20 ″; [Customized Grade 00 (Grade I): ≤ ± 5 ″;]

9. Surface roughness of working face: Ra ≤ 0.025um;

10. Surface roughness of datum plane: Ra ≤ 0.05 um;

11. Parallelism between the upper surface and the datum plane: 2 um;

12. Working angle deviation: Grade 0 (Grade II): ≤ ± 1 ″; Grade 1 (Grade 3): ≤ ± 2 ″; Grade 2 (Grade 4): ≤ ± 5 ″; [Customized Grade 00 (Grade I): ≤ ± 0.5 ″;]

13. Measurement uncertainty of working angle: Class 0 (Class II): ≤ 0.3 ″; Grade 1 (Grade III): ≤ 0.5 ″; Grade 2 (Grade 4): ≤ 1.0 ″; [Customized level 00 (first class): ≤ 0.2 ″;]

14,Effective working area of working face: circular area with S ≥ φ15mm (or 15mm * 15mm or D15mm);

Maintenance

1. Before using the prism, clean oil stain on the working surface of the prism with aviation washing gasoline, and then wipe it with a clean thick cloth or chamois.

2. In the process of using prisms, sweat gloves should be worn and handled with care to avoid hand contact with the working surface.

3. It is forbidden to use organic solvents such as alcohol to clean prism, because they will absorb moisture in the air and corrode the working surface of the prism.

4. Prisms should be used in a dry and clean environment.

5. After using the prism, it should be cleaned and wiped with aviation washing gasoline in time. It should be put into the dryer or the oil seal and stored in a dry place for proper storage. Do not collide, scratch or rust.

6. During transportation, the prism must be protected from bruise, rain, corrosive articles and harmful gases.