Mitutoyo 511-816 Micrometer Head Bore Gauge, Range 250 - 400 mm, Graduation 0.01 mm

Genuine Mitutoyo stock · Fast Kuwait-wide delivery

Part No. 511-816 | Range 250–400 mm

General Tech Services LLC — Genuine Mitutoyo Distributor, Kuwait +965 9807 4888

The Mitutoyo 511-816 micrometer head bore gauge measures large internal diameters from 250–400 mm. A micrometer head mounted on the anvil lets you set the size directly without requiring a setting ring for every dimension. It is suited to large-bore inspection in machine shops, maintenance workshops, calibration laboratories and industrial facilities across Kuwait.

Request a quote in under a minute — call or WhatsApp +965 9807 4888.

Product Overview

Setting a dial bore gauge for large diameters normally requires a setting ring of the same size, and large rings can be expensive and heavy. The Mitutoyo 511-816 has a micrometer head mounted on the anvil, allowing the dimension to be set conveniently and accurately at the bench.

The gauge features a longer plunger stroke while maintaining its original precision. The carbide contact point resists wear during repeated inspection, while the large sponge-structure grip reduces heat transfer from the operator's hand by 50%.

Sub-anvils provide a wide measuring range, and optional extension rods allow the gauge to reach deep holes. An optional inside-length standard, such as a setting ring or Inside Micro Checker, can be used to confirm the setting.

Typical applications include compressor casings, large valve bodies, turbine and gearbox housings. The Mitutoyo 511-816 is suitable for QC inspectors, calibration laboratories, fabrication and machining workshops serving Kuwait's oil, gas and utilities sectors.

Temperature control is important when measuring close-tolerance components. Steel expands by approximately 11.5 μm per metre per °C. At 400 mm, a 10°C temperature difference can move the steel dimension by roughly 46.0 μm. Allow the workpiece and the Mitutoyo 511-816 to reach the same temperature before taking a final reading.

For a larger bore range, see the Mitutoyo 511-817, which covers 400–600 mm.

Ready to order the 511-816? Speak to our metrology team. Call or WhatsApp +965 9807 4888.

Key Benefits

• Heat-insulating grip — reduces heat transfer from the operator's hand by 50%.

• Micrometer head setting — allows large sizes to be set without a matching-size setting ring.

• Deep-hole ready — optional extension rods support measurements in deeper holes.

• Self-centring — the guide helps align the measuring head with the true bore diameter.

• Carbide contact point — provides long wear life.

• Sub-anvils — provide a wide measuring range.

• 0.01 mm graduation — supports precise large-bore measurement.

• Mitutoyo 511 series — designed for repeatable bore measurement.

Ready to order the 511-816? — call or WhatsApp +965 9807 4888.

Who This Product Is Best For

• Machine shops checking compressor casings and large internal bores.

• QC teams measuring bore size, taper and ovality.

• Maintenance teams in oil and gas workshops.

• Calibration laboratories handling precision bore measurement.

• Fabrication and machining workshops.

• Engine, pump and hydraulic rebuild workshops.

• Utilities and industrial maintenance teams.

• Buyers standardising on the Mitutoyo 511-816 for repeatable bore checks.

How to Measure a Bore With This Gauge

1. Fit the appropriate anvil or washer combination for the nominal bore size.

2. Set zero against a setting ring or master using the micrometer head.

3. Insert the gauge into the bore and gently rock it through the bore.

4. Read the turning point on the indicator.

5. Record the deviation from the nominal dimension.

6. Repeat the measurement at different depths and positions to check for taper and ovality.

Frequently Asked Questions

What range does the Mitutoyo 511-816 micrometer head bore gauge measure?

It measures internal diameters from 250–400 mm.

Is a dial indicator included?

Yes, it is supplied with a 0.01 mm indicator.

Do I need a setting ring?

The micrometer head mounted on the anvil lets you set the size directly. A setting ring or Inside Micro Checker is optional for confirmation.

Why does the grip matter?

Heat from the operator's hand can affect precision measurements. The larger insulating grip reduces heat transfer from the hand by 50%, helping readings remain stable.

Which model should I choose if my part is outside 250–400 mm?

The Mitutoyo 511-815 covers 150–250 mm, while the Mitutoyo 511-817 covers 400–600 mm. Choose the model whose range covers the required bore size.

Can the Mitutoyo 511-816 be recalibrated?

Yes. The Mitutoyo 511-816 can be recalibrated periodically through an ISO/IEC 17025-accredited calibration service to help maintain traceable measurements.

How should I store and care for it?

Wipe the measuring faces clean after use, store the instrument in its case away from direct sunlight and coolant, and avoid dropping it. Check zero before each shift and schedule periodic calibration.

How do I order the Mitutoyo 511-816 micrometer head bore gauge in Kuwait?

Pricing is quote-based. Call or WhatsApp +965 9807 4888 with the model number and quantity, and our Ahmadi team will confirm price and availability.

For pricing or to place an order, contact General Tech Services LLC. Call or WhatsApp +965 9807 4888.