Mitutoyo, 2991A-10, Back Plunger Type Dial Indicator with 0.0001″ Graduation
Features:
- The back plunger performs full-stroke measurements
- A revolutionary offset spindle bushing design provides trouble-free stem clamping and a longer clamping range
- Unique shock-proof mechanism protects against shock from sudden spindle retraction
- Includes rotating bezel
- Rack gear is machine ground for tighter fit, increased accuracy
- Greater rigidity in the bearing plate reduces retracing error by up to 20%
- 4-Screw mounting increases impact resistance for better, longer accuracy
- No through screw hole on the frame provides better dust resistance
- Contact point is carbide tipped for lasting accuracy, durability
- Crystal is glare-free with a scratch-resistant coating
- Manufactured to meet ANSI/AGD and ISO/JIS standards
- Supplied in a fitted plastic case
The Mitutoyo back plunger dial indicator is designed with measuring spindles on the back of the indicator. This type of indicator offers the same precision and durability as other Mitutoyo dial indicators but is ideal for use in small spaces where graduations of standard dial indicators are difficult to see. The back plunger style makes this type of indicator suitable for mounting on leveling machine tool tables or inspection jigs. The crystal has a scratch and glare-resistant coating for clearer readings and better durability.
Dimensions:
Technical Details
| Digital/Analog | Analog |
| Inch-Metric | Inch |
| Functions | ANSI/AGD type |
| Range | 0.008″ |
| Range Per Revisison | 0.008″ |
| Graduation | 0.0001″ |
| Accuracy | ±0.0002″ |
| Measuring Force | 0.4-1.5 N |
| Error of Indication One Revolution | ±0.0002″ |
| Mass | 205 g |
| Stem | 9.52 mm / 0.375″ |
| Contact Point | Carbide tipped, thread: 4-48UNF |





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