- Designed to inspect parallelism and flatness of measuring faces of micrometers. For details, refer to “Quick Guide to Precision Measuring Instruments”.
- Each set consists of 4 sizes to aid in testing parallelism at various angular positions of the micrometer spindle.
SPECIFICATIONS
Metric
| Order No. | Range of micrometer to be checked | Sizes of parallels included in set | Diameter | Flatness | Parallelism | Remarks |
|---|---|---|---|---|---|---|
| 157-903 | 0 – 25mm | 12.00, 12.12, 12.25, 12.37mm | 030 | 0.1µm | 0.2µm | For 25mm |
| 157-904 | 25 – 50mm | 25.00, 25.12, 25.25, 13.37mm | For 50mm |
Inch
| Order No. | Range of micrometer to be checked | Sizes of parallels included in set | Diameter | Flatness | Parallelism | Remarks |
| 157-901 | 0 – 1″ | .5000″,.5062″, .5125″, .5187″ | 030 | 0.1µm | 0.2µm | For 25mm |
| 157-902 | 1 – 2″ | 1.0000″, 1.0062″, 1.0125″, 1.0187″ | For 50mm |
SERIES 158 Optical Flats
- Used for inspecting the flatness of very flat surfaces. For details, refer to “Quick Guide to Precision Measuring Instruments”.
SPECIFICATIONS
Metric
| Order No. | Thickness | Diameter | Flatness grade |
|---|---|---|---|
| 158-117 | 12mm | 045 | 0.2µm |
| 158-118 | 045 | 0.1µm | |
| 158-119 | 15mm | 060 | 0.2µm |
| 158-120 | 060 | 0.1µm |
Inch
| Order No. | Thickness | Diameter | Flatness grade |
| 158-122 | .5″ | 1.8″ | .000004″ |
| 158-124 | .6″ | 2.4″ |
