Mitutoyo 511-848, Micrometer Head Bore Gauge, Range 24.0 - 32.0", Graduation .0005"
Part No. 511-848 | Mitutoyo Series 511
Product Description
The Mitutoyo 511-848 is a large-bore micrometer head bore gauge designed for measuring internal diameters from 24–32" (609.6–812.8 mm). Unlike conventional bore gauges that rely primarily on combinations of anvils and spacers, this model incorporates a built-in micrometer head that allows the measuring size to be adjusted within its 2" micrometer travel.
The 511-848 uses a 2-point contact system for bore measurement and includes a 0.0005" graduation dial indicator. Its wide-range accuracy is 0.00008" (2 µm), with 0.5 µm repeatability and 1 µm adjacent error based on the supplied Series 511 data.
Supplied 2" and 4" sub-anvils extend the gauge's application range, while the carbide ball contact point is suited to repeated dimensional inspection. The gauge is particularly useful where large internal bores need to be checked efficiently during machining, overhaul or maintenance work.
As a comparator-type instrument, the 511-848 should be zeroed against a suitable reference before measurement. A setting ring or an outside micrometer set to the nominal dimension can be used. Gently rocking the gauge inside the bore helps locate the minimum reading and establish the measured diameter.
For a smaller bore range, the Mitutoyo 511-847 covers 16–24".
Key Benefits
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24–32" (609.6–812.8 mm) measuring range for large internal bores.
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Built-in 2" micrometer head allows convenient size adjustment.
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0.0005" graduation dial indicator provides clear readings.
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0.00008" (2 µm) wide-range accuracy.
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0.5 µm repeatability and 1 µm adjacent error.
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2" and 4" sub-anvils supplied for extended measurement applications.
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Carbide ball contact point supports repeated inspection.
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Protective dial cover helps protect the indicator during handling.
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Supplied in a fitted case for storage and transport.
Who This Product Is Best For
The 511-848 is suited to heavy engineering workshops, engine and compressor overhaul teams, large-part machining operations, pump and gearbox maintenance departments, and quality-control laboratories. It is useful for inspecting large bores during first-off inspection, in-process machining checks and maintenance or rebuild work.
How to Use
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Select the appropriate anvil or sub-anvil arrangement for the nominal bore size.
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Adjust the built-in micrometer head to the required measuring dimension.
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Zero the gauge against a suitable setting ring or an outside micrometer set to the nominal dimension.
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Insert the gauge carefully into the bore.
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Gently rock the gauge to locate the minimum dial reading.
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Compare the reading with the nominal reference dimension.
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Repeat measurements at different depths and angular positions to check for taper or ovality.
Frequently Asked Questions
What is the Mitutoyo 511-848 used for?
The 511-848 is used to measure large internal bore diameters from 24–32" (609.6–812.8 mm), particularly in machining, overhaul and maintenance applications.
What is the measuring range of the 511-848?
The measuring range is 24–32" (609.6–812.8 mm).
How accurate is the Mitutoyo 511-848?
The stated wide-range accuracy is 0.00008" (2 µm), with 0.5 µm repeatability and 1 µm adjacent error.
What is the dial indicator graduation?
The included dial indicator has a 0.0005" graduation.
What is the advantage of the built-in micrometer head?
The micrometer head allows the gauge to be adjusted within its specified micrometer travel, reducing the need to rely solely on repeated anvil and spacer combinations when setting different bore sizes.
What sub-anvils are supplied with the 511-848?
The supplied sub-anvils are 2" and 4".
Do I need a setting ring to use the 511-848?
The bore gauge is a comparator and should be zeroed against a known reference before measurement. A suitable setting ring or an outside micrometer can be used for this purpose.
What is the difference between the 511-848 and 511-847?
The 511-848 covers 24–32", while the 511-847 covers 16–24". Select the model according to the internal bore range that needs to be measured.
How do I buy the Mitutoyo 511-848 in Kuwait?
Call +965 9807 4888 or email mathews@generaltechkuwait.com for pricing, availability and delivery information.
