Mitutoyo 511-703 Bore Gauge 50-150mm
Part No. 511-703 | Range 50–150 mm | Accuracy 2 µm | Dial Indicator Not Included
Product Overview
The Mitutoyo 511-703 Series 511 dial bore gauge head is designed for comparative measurement of internal diameters from 50–150 mm. Its 2-point contact system is self-centring in the bore, allowing the gauge to be rocked and rotated to identify diameter variation, taper and ovality at different depths.
The 511-703 uses 11 interchangeable anvils together with a 50 mm sub-anvil and 4 spacers/washers to cover its specified measuring range. A carbide contact point provides a wear-resistant measuring surface for repeated inspection work, while the Ø8 mm gauge stem accepts a compatible dial indicator.
This model is supplied without a dial indicator, allowing the user to select a compatible Mitutoyo dial indicator or Digimatic indicator according to the required resolution and measurement workflow. This configuration is useful when an existing indicator is already available or when digital measurement and SPC data output are required.
The gauge head has a wide-range accuracy of 2 µm, with 0.5 µm repeatability and 1 µm adjacent error according to the supplied Series 511 catalogue data.
Like other comparative bore gauges, the 511-703 should be zeroed against a known reference before measurement. A suitable setting ring or an outside micrometer set to the nominal dimension can be used as the reference.
For a broader measuring range, the Mitutoyo 511-921-20 covers 18–150 mm.
Key Benefits
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Measures internal bore diameters across the 50–150 mm range.
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2-point contact system provides self-centring measurement.
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Supports inspection of bore diameter, taper and ovality.
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11 interchangeable anvils plus a 50 mm sub-anvil provide range adjustment.
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4 spacers/washers support dimensional setup across the measuring range.
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Carbide contact point supports durability during repeated measurements.
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Supplied without a dial indicator, allowing the user to select a compatible indicator.
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2 µm wide-range accuracy with 0.5 µm repeatability.
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Ø8 mm gauge stem for compatible indicator mounting.
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Fitted case provides convenient storage and protection.
For pricing and availability of the 511-703, call +966 569 289 544 or email mathews@generaltechsaudi.com.
Who This Product Is Best For
The Mitutoyo 511-703 is suitable for CNC machine shops, engine rebuilding workshops, hydraulic and pump maintenance teams, toolrooms, and quality-control departments that inspect internal diameters from 50–150 mm.
It is useful for machinists checking machined bores between operations, inspectors performing first-off and in-process dimensional checks, and maintenance personnel assessing bore wear during equipment inspection or rebuilding.
Because the dial indicator is not included, the 511-703 can also suit users who already have a compatible indicator or who want to configure the bore gauge with a particular dial or Digimatic indicator.
How to Use
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Install a compatible dial or Digimatic indicator in the Ø8 mm gauge stem.
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Select the appropriate interchangeable anvil, 50 mm sub-anvil and spacer/washer combination for the nominal bore size.
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Set the gauge to zero using a suitable setting ring or an outside micrometer adjusted to the nominal dimension.
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Insert the measuring head carefully into the bore.
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Rock the gauge gently to locate the minimum dial reading, which represents the comparative bore measurement.
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Compare the reading with the established zero position to determine deviation from nominal.
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Repeat the measurement at several depths and angular positions to check for taper and ovality.
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Clean the measuring contacts after use and store the gauge in its fitted case.
Frequently Asked Questions
What is the Mitutoyo 511-703 used for?
The 511-703 is a Series 511 dial bore gauge head for comparative measurement of internal diameters from 50–150 mm. It can also be used to identify bore variation such as taper and ovality.
Is the dial indicator included with the 511-703?
No. The 511-703 is supplied without a dial indicator. A compatible dial or Digimatic indicator can be selected separately according to the required resolution and measurement requirements.
How accurate is the Mitutoyo 511-703?
The supplied Series 511 catalogue data specifies 2 µm wide-range accuracy, 0.5 µm repeatability and 1 µm adjacent error for the gauge head.
How many interchangeable anvils are supplied?
The specification lists 11 interchangeable anvils together with a 50 mm sub-anvil and 4 spacers/washers.
Does the 511-703 require a setting ring?
The gauge should be zeroed against a known reference before measurement. A suitable setting ring or an outside micrometer set to the nominal bore size can be used. The reference tool is separate from the gauge.
What is the difference between the 511-703 and 511-921-20?
The 511-703 covers 50–150 mm and is supplied without a dial indicator. The 511-921-20 covers a broader 18–150 mm range and is a 3-piece bore gauge set with its specified dial indicator and interchangeable measuring components.
What is the difference between the 511-703 and 511-713-20?
Both models cover the 50–150 mm range. The 511-703 is supplied without a dial indicator, while the 511-713-20 is supplied with a 0.01 mm dial indicator. The 511-703 allows the user to select a compatible indicator separately.
Can I use a Digimatic indicator with the 511-703?
The 511-703 is supplied without an indicator, allowing the user to configure the gauge with a compatible indicator. Confirm indicator compatibility and mounting requirements before ordering.
How can I buy the Mitutoyo 511-703 in Saudi Arabia?
Contact General Tech Services in Dammam at +966 569 289 544 or mathews@generaltechsaudi.com for pricing, stock availability and delivery information.
