Mitutoyo 511-726 Dial Bore Gauge Range 250 - 400 mm, Graduation 0.001 mm
Part No. 511-726 | Range 250–400 mm | Graduation 0.001 mm
General Tech Services LLC — Genuine Mitutoyo Distributor, Kuwait +965 9807 4888
Product Overview
The Mitutoyo 511-726 dial bore gauge measures internal diameters from 250–400 mm with a self-centring two-point head and a supplied 0.001 mm dial indicator. Its centring guide helps align the measuring head across the true bore diameter, making it suitable for checking bore size, taper and ovality.
The latest 511 series design provides a longer plunger stroke while retaining the established gauge design. A carbide contact point provides wear resistance, while the larger heat-insulating grip reduces heat transfer from the operator's hand by 50%, helping maintain stable readings during extended inspection work.
Interchangeable 0.5 mm washers allow fine step adjustment of the anvils, while optional extension rods provide access to deeper bores. Before measurement, set the gauge against a setting ring or optional Inside Micro Checker.
Typical applications include compressor casings, large valve bodies, turbine housings and gearbox housings. The gauge is suitable for QC inspectors, calibration laboratories, and fabrication and machining workshops serving Kuwait's oil, gas and utilities sectors.
Temperature can affect close-tolerance bore measurements. Steel expands approximately 11.5 μm per metre per °C. At 400 mm, a 10 °C temperature difference can produce approximately 46.0 μm of dimensional change. Allow the workpiece and gauge to reach the same temperature before taking a final reading.
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Key Benefits
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Self-centring two-point head helps align the gauge with the true bore diameter
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Carbide contact point provides durable wear resistance
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Heat-insulating grip reduces heat transfer from the operator's hand by 50%
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Fine setting with interchangeable 0.5 mm washers
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Optional extension rods support measurement of deeper bores
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Longer plunger stroke for practical bore inspection
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Suitable for checking bore size, taper and ovality
Who This Product Is Best For
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Machine shops checking compressor casings
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QC teams measuring bore size, taper and ovality
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Calibration laboratories performing dimensional inspections
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Fabrication and machining workshops
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Oil and gas maintenance teams
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Engine, pump and hydraulic equipment rebuild workshops
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Buyers standardising bore inspection procedures across Kuwait
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 reading.
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Insert the measuring head into the bore.
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Rock the gauge gently through the bore until the indicator reaches its turning point.
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Read and record the deviation from the reference value.
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Repeat the measurement at different depths and positions to check for taper and ovality.
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Keep the measuring faces clean and store the gauge in its case between jobs.
Frequently Asked Questions
What range does the Mitutoyo 511-726 dial bore gauge measure?
It measures internal diameters from 250–400 mm.
Is a dial indicator included?
Yes. The 511-726 is supplied with a 0.001 mm dial indicator.
Do I need a setting ring?
For accurate comparative measurement, set the gauge against a setting ring or master of known size before measuring the workpiece.
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%, helping maintain stable readings.
Which model should I choose for smaller bores?
The Mitutoyo 511-725 covers 160–250 mm, making it the adjacent smaller-range model to the 511-726.
Can the Mitutoyo 511-726 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 and store the instrument in its case away from direct sunlight and coolant. Avoid dropping the gauge, check the reference reading before inspection work, and schedule periodic calibration as required.
How do I order the Mitutoyo 511-726 in Kuwait?
Pricing is quote-based. Call or WhatsApp +965 9807 4888 with the model number and required quantity for pricing and availability.
Request Pricing & Availability
For the Mitutoyo 511-726 dial bore gauge, call or WhatsApp +965 9807 4888 for Kuwait pricing and availability.
