Mitutoyo 511-756 Dial Bore Gauge Rang 10-16", Graduation .0001"
Part No. 511-756 | Range 10"–16" (254–406.4 mm) | Graduation 0.0001"
General Tech Services LLC — Genuine Mitutoyo Distributor, Kuwait +965 9807 4888
Product Overview
The Mitutoyo 511-756 dial bore gauge measures internal diameters from 10"–16" (254–406.4 mm) using a self-centring two-point head and a supplied 0.0001" dial indicator. Carbide contact points provide wear resistance, while the heat-insulating grip reduces heat transfer from the operator's hand by 50% for more stable readings during extended inspections.
The 511-756 uses a two-point contact system with a centring guide to align the measuring head across the true bore diameter as the gauge is gently rocked through the bore. Its longer plunger stroke supports large-bore inspection, while interchangeable 0.5 mm washers allow fine step adjustment of the anvils. Optional extension rods can be used when additional reach is required.
Before measurement, set the gauge against a setting ring or master of known size. An optional Inside Micro Checker can also be used for setting. Typical applications include very large pump and compressor casings, pipe flanges, turbine housings and heavy fabrications.
Temperature control is important for large-bore inspection. Steel expands by approximately 11.5 μm per metre per °C. At 406.4 mm, a 10°C temperature difference can correspond to approximately 46.7 μm of dimensional change. Allow the Mitutoyo 511-756 and the workpiece to reach the same temperature before taking a final reading.
Key Benefits
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Self-centring two-point head — helps align the gauge across the true bore diameter
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Carbide contact point — provides wear resistance for repeated inspection
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Heat-insulating grip — reduces heat transfer from the operator's hand by 50%
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Fine setting — interchangeable 0.5 mm washers allow small step adjustments
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Deep-hole measurement — optional extension rods provide additional reach
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0.0001" graduation — supports detailed internal-diameter inspection
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Mitutoyo 511 series design — suited to repeatable large-bore measurement
Who This Product Is Best For
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Machine shops checking very large pump and compressor bores
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QC inspectors measuring bore size, taper and ovality
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Maintenance teams working on power and desalination plant equipment
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Oil and gas service contractors in Kuwait
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Refinery and industrial maintenance teams
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Engine, pump and hydraulic rebuild workshops
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Fabrication and machining teams inspecting large internal diameters
How to Measure a Bore With This Gauge
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Select the appropriate anvil and 0.5 mm washer combination for the nominal bore size.
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Set the gauge against a setting ring or master of known size and establish the reference.
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Insert the gauge into the bore and gently rock it through the measuring position.
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Identify the turning point of the dial indicator and record the deviation from the nominal dimension.
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Repeat measurements at different depths and positions to check for taper or ovality.
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Keep the gauge and workpiece at the same temperature before taking the final reading.
Frequently Asked Questions
What range does the Mitutoyo 511-756 dial bore gauge measure?
It measures internal diameters from 10"–16" (254–406.4 mm).
Is a dial indicator included?
Yes. The Mitutoyo 511-756 is supplied with a 0.0001" dial indicator.
Do I need a setting ring?
A setting ring or master of known size is used to establish the reference before measurement. An optional Inside Micro Checker can also be used for setting.
Why does the grip matter?
Heat from the operator's hand can affect dimensional stability. The larger heat-insulating grip reduces heat transfer from the hand by 50%.
Which model should I choose for smaller bore sizes?
The Mitutoyo 511-755 covers 6.5"–10" (165.1–254 mm), while the 511-756 covers 10"–16" (254–406.4 mm). Select the model whose measuring range covers the required bore.
Can the Mitutoyo 511-756 be recalibrated?
Yes. Periodic recalibration through an ISO/IEC 17025-accredited calibration service can help maintain measurement traceability.
How should I store and care for the gauge?
Clean the measuring faces after use, store the instrument in its case away from direct sunlight and coolant, and avoid dropping it. Check the reference before inspection and schedule periodic calibration as required.
How do I order the Mitutoyo 511-756 in Kuwait?
Pricing is quote-based. Call or WhatsApp +965 9807 4888 with the model number and required quantity for pricing and availability.
