Holtest (Type II) SERIES 368 — Three-point Bore Micrometers | MITUTOYO
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HT-R-TYPE2
• The Holtests (type II) have three contact points made of alloy steel for a more economically priced tool.
• Same accuracy as the titanium-coated Holtest models.
• Constant-force device allows stable measurement.
• Can measure deep holes using an extension rod (optional).
SPECIFICATIONS
Metric ___ Individual
| Order No. | Range*² (mm) |
Graduation (mm) |
Maximum permissible error J MPE (μm)*¹ |
J MPE (μm)*1 Extension Rod (optional) |
| 368-764 | 12 - 16 | 0.005 | ±3 (maximum difference 3) |
952621 (150 mm) |
| 368-765 | 16 - 20 | |||
| 368-766 | 20 - 25 | 952622 (150 mm) |
||
| 368-767 | 25 - 30 | |||
| 368-768 | 30 - 40 | |||
| 368-769 | 40 - 50 | |||
| 368-770 | 50 - 63 | 952623 (150 mm) |
||
| 368-771 | 62 - 75 | ±4 (maximum difference 4) |
||
| 368-772 | 75 - 88 | |||
| 368-773 | 87 - 100 | |||
| 368-774 | 100 - 125 | ±5 (maximum difference 5) |
||
| 368-775 | 125 - 150 | |||
| 368-776 | 150 - 175 | |||
| 368-777 | 175 - 200 | |||
| 368-778 | 200 - 225 | ±6 (maximum difference 6) |
||
| 368-779 | 225 - 250 | |||
| 368-780 | 250 - 275 | |||
| 368-781 | 275 - 300 |
*1 Additionally, the difference in permissible error allowable is limited to a value within this range, as given in parentheses, an is measured with the entire measuring surface in contact with the object measured.
*2 The measurement range cannot be enlarged by measuring heads that are not standard-supplied (the accuracy is not guaranteed).
Note: Setting rings are optional.
| แบรนด์สินค้า | MITUTOYO |
|---|---|
| Digital/Analog | Analog |
| Inch-Metric | Metric |
| Range | L2 | L1 |
| 12 - 16, 16 - 20 | 82 | 126 - 130 |
| 20 - 25, 25 - 30 | 94 | 137 - 142 |
| 30 - 40, 40 - 50 | 102 | 145 - 155 |
| 50 - 63, 62 - 75, 75 - 88, 87 - 100 | 105 | 150 - 163 |
| 100 - 125, 125 - 150, 150 - 175, 175 - 200 200 - 225, 225 - 250, 250 - 275, 275 - 300 |
161 | 227 - 252 |
Note: External appearance differs depending on the measuring range.
Reference dimensions when measuring a blind hole
| Range (mm) | L3 (mm) | L5 (mm) |
| 12 - 20 | 2.6 or below | 3.5 |
| 20 - 30 | 3.4 or below | 5.2 |
| 30 - 50 | 10.0 | |
| 50 - 100 | 14.0 | |
| 100 - 300 | 19.6 or below | 13.8 |
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