Mitutoyo 511-848, Micrometer Head Bore Gauge, Range 24.0 - 32.0", Graduation .0005"
Part No. 511-848 | Range 24–32" (609.6–812.8 mm) | Graduation 0.0005" | Accuracy 0.00008" (2 µm) | Micrometer Head Travel 2"
Product Overview
The Mitutoyo 511-848 Series 511 micrometer head bore gauge is designed for measuring large internal bore diameters from 24–32" (609.6–812.8 mm). Its built-in micrometer head allows the measuring size to be adjusted across 2" of travel, reducing the need for frequent anvil changes when working with large bores.
The gauge is supplied with 2" and 4" sub-anvils to configure the measuring setup for the specified range. The included dial indicator has a 0.0005" graduation, while the supplied Series 511 data specifies 0.00008" (2 µm) wide-range accuracy, 0.5 µm repeatability and 1 µm adjacent error at the head.
The carbide ball contact point is designed for repeated contact with the measured bore, while the Ø3/8" gauge stem and fitted case provide the specified configuration for workshop and inspection use.
Like other comparative bore gauges, the 511-848 should be zeroed against a known reference before measurement. A suitable setting ring or outside micrometer can be used to establish the nominal dimension.
For a smaller large-bore range, the Mitutoyo 511-847 covers 16–24". The 511-858 is another 24–32" model with a different dial graduation.
Key Benefits
-
24–32" (609.6–812.8 mm) measuring range for large internal bores.
-
Built-in micrometer head with 2" of travel for convenient size adjustment.
-
0.0005" dial graduation for clear analogue readings.
-
0.00008" (2 µm) wide-range accuracy according to the supplied Series 511 data.
-
0.5 µm repeatability and 1 µm adjacent error at the head.
-
2" and 4" sub-anvils supplied for configuring the measuring range.
-
Carbide ball contact point for repeated bore inspection.
-
Ø3/8" gauge stem.
-
Supplied in a fitted case for storage and transport.
Who This Product Is Best For
The Mitutoyo 511-848 is suitable for heavy engineering workshops, engine and compressor overhaul operations, large-part machining cells and dimensional inspection environments where internal bore sizes fall within the 24–32" range.
It can be used by machinists checking large machined bores, inspectors verifying first-off and finished components, and maintenance engineers assessing bore wear during overhaul and repair work.
How to Use / How It Works
-
Configure the gauge with the appropriate sub-anvil for the nominal bore size.
-
Adjust the built-in micrometer head to the required nominal dimension.
-
Establish the reference using a suitable setting ring or an outside micrometer.
-
Zero the dial bore gauge against the reference dimension.
-
Insert the gauge into the bore and gently rock it to locate the minimum dial reading.
-
Use the dial reading to determine the deviation from nominal.
-
Repeat measurements at different depths and angular positions to check for taper, ovality or other dimensional variation.
Because the 511-848 is a comparative measuring instrument, correct zeroing against a suitable reference is important for reliable measurements.
Frequently Asked Questions
What is the Mitutoyo 511-848 used for?
It is a micrometer head bore gauge designed for measuring large internal bore diameters from 24–32" (609.6–812.8 mm).
What is the correct range of the Mitutoyo 511-848?
The supplied Series 511 specification identifies the 511-848 as a 24–32" model, equivalent to 609.6–812.8 mm. It should not be listed as a 240–320 mm model.
What is the dial graduation?
The included dial indicator has a 0.0005" graduation.
How accurate is the Mitutoyo 511-848?
The supplied catalogue data specifies 0.00008" (2 µm) wide-range accuracy, with 0.5 µm repeatability and 1 µm adjacent error.
How much travel does the micrometer head have?
The built-in micrometer head has 2" of travel.
Which sub-anvils are supplied?
The supplied specification identifies 2" and 4" sub-anvils.
Why use a micrometer head bore gauge?
The built-in micrometer head allows the measuring setup to be adjusted across its specified travel, which can reduce the need for repeated anvil changes when measuring large bores.
What is the difference between the 511-848 and 511-858?
Both models are specified for the 24–32" range, but the 511-848 is supplied with a 0.0005" dial indicator, while the 511-858 is identified in the supplied product information as having a 0.0001" dial.
Which model should I choose for a smaller range?
The Mitutoyo 511-847 covers 16–24", while the 511-848 covers 24–32".
How can I buy the Mitutoyo 511-848 in Saudi Arabia?
Contact General Tech Services in Dammam for pricing, availability and delivery information. You can call +966 569 289 544 or email mathews@generaltechsaudi.com.
