The Mitutoyo Holtest (Type II) mechanical three-point internal micrometer utilizes three self-centering anvils constructed of alloyed steel for accurate and efficient measurements of inside dimensions of bores.
Series 368
Mechanical Holtest (Type II) Three-Point Internal Micrometers
Features & Benefits
The Mitutoyo mechanical Holtest internal micrometer features three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. A hardened steel spindle with a carbide ball and cone with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtest’s ratchet stop mechanism provides a constant measuring force on the hardened-steel spindle to ensure accurate, even measurements.
- Available in Metric and Inch models
- Optional extension rod allows for measuring deep holes
- Optional setting rings for zero point adjustment are available
- Design allows for measurements closer to the bottom of blind bore holes
- Scale on thimble and sleeve is laser etched for easier reading in all conditions
- Holtests up to 100mm / 4″ diameter measurements supplied in a fitted plastic case
- Holtests over 100mm / 4″ diameter measurements supplied in a wooden case
SERIES 368 Technical Data
| Technology: | Mechanical |
|---|---|
| Contact Point: | Alloy Steel |
| Measuring Method: | Three-point method |
| Ratchet/Thimble: | Ratchet Stop |
Product List
| Order No.: | Product Image: | Units: | Range: | Graduation: | Accuracy: | Main Body Assembly: | Mass: | Extension Rod (Optional): |
|---|---|---|---|---|---|---|---|---|
| 368-764 | - | Metric | 12 - 16mm | 0.005mm | ±3µm | 04AZA839 | 150g | 952621 |
| 368-765 | - | Metric | 16 - 20mm | 0.005mm | ±3µm | 04AZA840 | 150g | 952621 |
| 368-766 | - | Metric | 20 - 25mm | 0.005mm | ±3µm | 04AZA848 | 260g | 952622 |
| 368-767 | - | Metric | 25 - 30mm | 0.005mm | ±3µm | 04AZA849 | 280g | 952622 |
| 368-768 | - | Metric | 30 - 40mm | 0.005mm | ±3µm | 04AZA857 | 290g | 952622 |
| 368-769 |  |
Metric | 40 - 50mm | 0.005mm | ±3µm | 04AZA858 | 330g | 952622 |
| 368-770 |  |
Metric | 50 - 63mm | 0.005mm | ±3µm | 04AZA870 | 440g | 952623 |
| 368-771 | - | Metric | 62 - 75mm | 0.005mm | ±4µm | 04AZA871 | 450g | 952623 |
| 368-772 | - | Metric | 75 - 88mm | 0.005mm | ±4µm | 04AZA872 | 560g | 952623 |
| 368-773 | - | Metric | 87 - 100mm | 0.005mm | ±4µm | 04AZA873 | 570g | 952623 |
| 368-774 |  |
Metric | 100 - 125mm | 0.005mm | ±5µm | 04AZA895 | 1020g | 952623 |
| 368-775 | - | Metric | 125 - 150mm | 0.005mm | ±5µm | 04AZA896 | 1110g | 952623 |
| 368-776 | - | Metric | 150 - 175mm | 0.005mm | ±5µm | 04AZA897 | 1200g | 952623 |
| 368-777 | - | Metric | 175 - 200mm | 0.005mm | ±5µm | 04AZA898 | 1300g | 952623 |
| 368-778 |  |
Metric | 200 - 225mm | 0.005mm | ±6µm | 04AZA899 | 1420g | 952623 |
| 368-779 | - | Metric | 225 - 250mm | 0.005mm | ±6µm | 04AZA900 | 1540g | 952623 |
| 368-780 |  |
Metric | 250 - 275mm | 0.005mm | ±6µm | 04AZA901 | 1690g | 952623 |
| 368-781 | - | Metric | 275 - 300mm | 0.005mm | ±6µm | 04AZA902 | 1860g | 952623 |
| 368-864 |  |
Inch | 0.5-0.65" | 0.0002" | ±0.00015" | 04AZA841 | 150g | 952621 |
| 368-865 |  |
Inch | 0.65-0.8" | 0.0002" | ±0.00015" | 04AZA842 | 150g | 952621 |
| 368-866 |  |
Inch | 0.8-1" | 0.0002" | ±0.00015" | 04AZA850 | 260g | 952622 |
| 368-867 | - | Inch | 1-1.2" | 0.0002" | ±0.00015" | 04AZA851 | 280g | 952622 |
| 368-868 |  |
Inch | 1.2-1.6" | 0.0002" | ±0.00015" | 04AZA859 | 290g | 952622 |
| 368-869 |  |
Inch | 1.6-2" | 0.0002" | ±0.00015" | 04AZA860 | 330g | 952622 |
| 368-870 |  |
Inch | 2-2.5" | 0.0002" | ±0.00015" | 04AZA874 | 440g | 952623 |
| 368-871 |  |
Inch | 2.5-3" | 0.0002" | ±0.00020" | 04AZA875 | 450g | 952623 |
| 368-872 | - | Inch | 3-3.5" | 0.0002" | ±0.00020" | 04AZA876 | 560g | 952623 |
| 368-873 | - | Inch | 3.5-4" | 0.0002" | ±0.00020" | 04AZA877 | 570g | 952623 |
| 368-874 | - | Inch | 4-5" | 0.0002" | ±0.00025" | 04AZA903 | 1020g | 952623 |
| 368-875 | - | Inch | 5-6" | 0.0002" | ±0.00025" | 04AZA904 | 1110g | 952623 |
| 368-876 |  |
Inch | 6-7" | 0.0002" | ±0.00025" | 04AZA905 | 1200g | 952623 |
| 368-877 | - | Inch | 7-8" | 0.0002" | ±0.00025" | 04AZA906 | 1300g | 952623 |
| 368-878 | - | Inch | 8-9" | 0.0002" | ±0.00030" | 04AZA907 | 1420g | 952623 |
| 368-879 |  |
Inch | 9-10" | 0.0002" | ±0.00030" | 04AZA908 | 1540g | 952623 |
| 368-880 |  |
Inch | 10-11" | 0.0002" | ±0.00030" | 04AZA909 | 1690g | 952623 |
| 368-881 | - | Inch | 11-12" | 0.0002" | ±0.00030" | 04AZA910 | 1860g | 952623 |