Precision is our Profession
Precision is our ProfessionMitutoyo Optical Parallels, Series 157
- Designed to inspect parallelism and flatness of measuring faces of micrometers.
- Each set consists of 4 thicknesses.
- Supplied in fitted wooden case.
Technical Data
Flatness: .000004” / 0.1μm
Parallelism: .000008” / 0.2μm
Diameter: 1.18” / 30mm
Parallelism check between measuring faces by means of interference fringe produced by an optical parallel.
The parallelism between the measuring faces can be determined as follows--place the optical parallel to the anvil and observe the number of interference fringes produced on the spindle side under the measuring force of the
micrometers. The parallelism is about 1μm (0.32μm x 3 = 0.96μm).
Fringe on the anvil side must not be more than one.
| Optical Parallels, Series 157 | ||||
| Code | Model | Micrometers to be checked | Thickness of Parallel | Price |
| Metric | ||||
| 157-903 (4pcs/set) | OP-25 | 0-25mm | 12, 12.25, 12.37mm | 22,700.00 |
| 157-904 (4pcs/set) | OP-50 | 25-50mm | 25, 25.12, 25.25, 25.37mm | 59,200.00 |
| Inches | ||||
| 157-901 (4pcs/set) | OP-1 | 0-1" | 0.5", 0.5062", 0.5125", 0.5178" | 24,800.00 |