Digimatic Holtest SERIES 468 — Three-point Bore Micrometers | MITUTOYO
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• These three-point bore Digimatic micrometers for inside measurement are suitable for highly accurate measurements.
• Can measure deep holes using an extension rod (optional).
• Can measure close to the bottom of a blind hole.
• Titanium-coated measuring pins provide excellent durability and impact resistance.
• Two values can be preset as a reference point, allowing you to store multiple measured values of setting rings and to quickly prepare for measurement.
SPECIFICATIONS
Metric
| Order No. | Range*² (mm) |
Resolution (mm) |
Maximum permissible error J MPE (μm)*¹ |
Extension Rod (optional) |
| 468-161 | 6 - 8 | 0.001 | ±2 (maximum difference 2) | 952322 (100 mm) |
| 468-162 | 8 - 10 | |||
| 468-163 | 10 - 12 | |||
| 468-164 | 12 - 16 | ±3 (maximum difference 3) | 952621 (150 mm) |
|
| 468-165 | 16 - 20 | |||
| 468-166 | 20 - 25 | 952622 (150 mm) |
||
| 468-167 | 25 - 30 | |||
| 468-168 | 30 - 40 | |||
| 468-169 | 40 - 50 | |||
| 468-170 | 50 - 63 | 952623 (150 mm) |
||
| 468-171 | 62 - 75 | ±4 (maximum difference 4) | ||
| 468-172 | 75 - 88 | |||
| 468-173 | 87 - 100 | |||
| 468-174 | 100 - 125 | ±5 (maximum difference 5) | ||
| 468-175 | 125 - 150 | |||
| 468-176 | 150 - 175 | |||
| 468-177 | 175 - 200 | |||
| 468-178 | 200 - 225 | ±6 (maximum difference 6) | ||
| 468-179 | 225 - 250 | |||
| 468-180 | 250 - 275 | |||
| 468-181 | 275 - 300 |
Inch / Metric
| Order No. | Range*² (in) |
Resolution | Maximum permissible error J MPE (μm)*¹ |
Extension Rod (optional) |
| 468-261 | 0.275 - 0.35 | 0.00005 in/ 0.001 mm |
±0.0001 (maximum difference 0.0001) |
952322 (100 mm) |
| 468-262 | 0.35 - 0.425 | |||
| 468-263 | 0.425 - 0.5 | |||
| 468-264 | 0.5 - 0.65 | ±0.00015 (maximum difference 0.00015) |
952621 (150 mm) |
|
| 468-265 | 0.65 - 0.8 | |||
| 468-266 | 0.8 - 1 | 952622 (150 mm) |
||
| 468-267 | 1 - 1.2 | |||
| 468-268 | 1.2 - 1.6 | |||
| 468-269 | 1.6 - 2 | |||
| 468-270 | 2 - 2.5 | 952623 (150 mm) |
||
| 468-271 | 2.5 - 3 | ±0.0002 (maximum difference 0.0002) |
||
| 468-272 | 3 - 3.5 | |||
| 468-273 | 3.5 - 4 | |||
| 468-274 | 4 - 5 | 0.0001 in/ 0.001 mm |
±0.00025 (maximum difference 0.00025) |
|
| 468-275 | 5 - 6 | |||
| 468-276 | 6 - 7 | |||
| 468-277 | 7 - 8 | |||
| 468-278 | 8 - 9 | ±0.0003 (maximum difference 0.0003) |
||
| 468-279 | 9 - 10 | |||
| 468-280 | 10 - 11 | |||
| 468-281 | 11 - 12 |
• Power source: SR44 battery (1 pc.), 938882 included as standard (for operational checks)
• Battery life: Approx. 1.2 years under normal use
• Position detection method: Electromagnetic induction-type rotary encoder
*1 Additionally, the difference in permissible error allowable is limited to a value within this range, as given in parentheses, and 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 | Digital |
| Range | L2* | L1 |
| 6 - 8, 8 - 10, 10 - 12 mm | 59 | 175 - 177 |
| 12 - 16, 16 - 20 mm | 84 | 197 - 201 |
| 20 - 25, 25 - 30 mm | 93 | 206 - 211 |
| 30 - 40, 40 - 50 mm | 103 | 214 - 224 |
| 50 - 63, 62 - 75, 75 - 88, 87 - 100 mm |
105 | 219 - 232 |
| 100 - 125, 125 - 150, 150 - 175, 175 - 200, 200 - 225, 225 - 250, 250 - 275, 275 - 300 mm |
151 | 286 - 311 |
* L2 is maximum depth of measurement possible.
Note: External view differs depending on measurement range.
Reference dimensions when measuring a blind hole
| Range (mm) | L3 (mm) | L4 (mm) | L5 (mm) |
| 6 - 12 | 2 or below | - | 2.5 |
| 12 - 20 | 0.3 or below | 5.6 | 3.5 |
| 20 - 30 | 8.3 | 5.2 | |
| 30 - 50 | 13.0 | 10.0 | |
| 50 -100 | 17.0 | 14.0 | |
| 100 - 300 | 12.4 or below | 21.0 | 13.8 |
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