Back Plunger Type Dial Indicators
Product Specifications:
Range: Up to 1 mm (metric) / 0.2 in (inch)
Graduation: 0.001 mm / 0.01 mm (metric), 0.0001 in / 0.001 in (inch)
Accuracy: Up to ±0.001 mm (metric) / ±0.0002 in (inch)
Construction: Rugged design with shockproof mechanism and jeweled bearings for high durability.
Mitutoyo Back Plunger Type Dial Indicator
The Mitutoyo Back Plunger Type Dial Indicator is a precision comparison measuring tool designed for maximum accuracy and visibility in small places. These indicators, which are ideal for installing on leveling machine tool tables or inspection jigs, are built to strict industrial specifications. This tool, supplied by Bombay Tools Supplying Agency Private Limited, is well-known for its longevity and consistency of measurement.
What is a Back Plunger Type Dial Indicator?
A Back Plunger Type Dial Indicator is a tiny, mechanical instrument that measures minor linear displacements with excellent precision. Unlike typical dial indicators, the plunger is positioned in the back, making it appropriate for configurations with limited front access or poor visibility. It is widely utilized in quality assurance, precision machining, and alignment operations in the manufacturing industry.
Features and Benefits
Space-Saving Design: The rear-facing plunger allows for easy installation in limited or difficult-to-access regions, boosting usefulness in tight measurement setups.
High-Resolution Models: Models such as the 2990T-10 have a fine graduation of 0.001 mm, allowing for ultra-precise measurements.
Shock-Proof Mechanism: Mitutoyo’s proprietary shock-proofing provides impact resistance and extends the instrument’s li
Jeweled Bearings: Reduces friction and wear, resulting in improved long-term accuracy and smooth performance.
Balanced Dial Scale: Provides easy-to-read dial markings and a smooth needle response for quick, consistent readings.
Multiple Model Options: To meet diverse application requirements, choose from metric and inch-based models, such as ISO/JIS and ANSI/AGD.
A back plunger type dial indicator measures small linear displacements using a spring-loaded plunger that moves in and out along its axis. It’s commonly mounted on a comparator stand or fixture to check flatness, runout, and dimensional variation on a workpiece. This model offers a range up to 1mm (metric) / 0.2in (inch) with graduation of 0.001-0.01mm and accuracy up to ±0.001mm.
Plunger vs Lever Type Dial Indicators
Plunger-type dial indicators measure displacement along a straight line as the spindle moves in and out, while lever-type indicators use a pivoting arm, which suits confined spaces where straight-line travel isn’t practical. Back plunger dial indicators are mounted from the rear, which suits comparator stands and dedicated gauging fixtures.
Frequently Asked Questions
What is the difference between a plunger-type and lever-type dial indicator?
A plunger-type indicator measures displacement along a straight line as its spindle moves in and out, while a lever-type indicator uses a pivoting arm, which suits confined spaces where straight-line travel isn’t practical.
When should a back plunger dial indicator be used?
It’s suited to setups like comparator stands and fixtures where the indicator is mounted from behind and needs straight-line plunger travel, such as flatness or runout checks.
What is a dial indicator used to measure?
Dial indicators measure small linear displacements, commonly used to check flatness, parallelism, runout, and thickness variation on machined or rotating parts.
What is the measuring range of this dial indicator?
This model has a range up to 1mm (metric) / 0.2in (inch), with graduation of 0.001mm/0.01mm (metric) or 0.0001in/0.001in (inch), and accuracy up to ±0.001mm (metric) / ±0.0002in (inch). High-resolution models such as the 2990T-10 offer a fine graduation of 0.001mm.
How is a dial indicator mounted for use?
Dial indicators are typically mounted on a comparator stand, magnetic base, or dedicated fixture, positioned so the plunger contacts the workpiece surface being checked.
How often should a dial indicator be calibrated?
Calibration frequency depends on usage and your quality system’s requirements. BTSA operates NABL-accredited calibration services in Chennai and Hyderabad.
See BTSA’s guide to lever dial gauges and plunger dial gauges and their accessories, or browse the full Mitutoyo Dial Indicators (Plunger Dial) range.
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