Mitutoyo 511-212 Small Hole Bore Gauge, Range .24 - .4", Graduation .0001"

Part No. 511-212 | Range 0.24"–0.4" (6.096–10.16 mm)

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

The Mitutoyo 511-212 small hole bore gauge measures small internal diameters from 0.24"–0.4" (6.096–10.16 mm) with a self-centring bridge, long plunger stroke and 0.0001" graduation. It is designed for precise small-bore inspection in machine shops, maintenance workshops, QC environments and industrial applications across Kuwait. Request a quote in under a minute: call or WhatsApp +965 9807 4888.

Product Overview

The Mitutoyo 511-212 is designed for measuring small bores where accurate dimensional control is essential. Its centring bridge self-centres in the bore, helping align the measuring head with the true diameter, while the long plunger stroke supports precise readings.

Interchangeable 0.5 mm washers provide small setting increments, while carbide contact points offer wear resistance for repeated inspection. The large heat-insulating grip reduces heat transfer from the operator's hand by 50%, helping maintain stable measurements during use.

For best accuracy, set the gauge against a setting ring or master of known size before measuring. Typical applications include small valve bores, injector and hydraulic spool housings, bushings and reamed holes.

The 511-212 is suitable for oil and gas maintenance workshops, refinery and petrochemical shutdown crews, CNC machine shops, QC teams and industrial maintenance operations across Kuwait.

Temperature can influence precision bore measurements. Steel expands by approximately 11.5 μm per metre per °C. At 10.2 mm, a 10°C temperature difference can change the dimension by approximately 1.2 μm. Allow the workpiece and gauge to reach the same temperature before taking a final reading.

For a larger bore range, the Mitutoyo 511-206 covers 0.4"–0.74".

Key Benefits

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

• Carbide contact point — provides long wear life.

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

• Fine setting — interchangeable 0.5 mm washers support small setting adjustments.

• Deep-hole ready — optional extension rods provide additional reach when required.

• 0.0001" graduation — supports precise small-bore dimensional inspection.

• Mitutoyo 511 series — established bore gauge design for workshop and quality-control applications.

Ready to order the 511-212? Call or WhatsApp +965 9807 4888 for a fast quote.

Who This Product Is Best For

• Machine shops checking small valve bores, bushings and reamed holes.

• QC teams measuring bore size, taper and ovality.

• Maintenance teams carrying out dimensional checks on industrial equipment.

• Oil and gas maintenance workshops and refinery and petrochemical shutdown crews.

• CNC machine shops requiring repeatable small-bore measurements.

• Engine, pump and hydraulic rebuild workshops.

• Buyers standardising on Mitutoyo 511-series bore gauges for routine inspection.

How to Measure a Bore With This Gauge

1. Fit the appropriate anvil or 0.5 mm washer combination for the nominal bore size.

2. Set the gauge to zero against a setting ring or master of known size.

3. Insert the gauge into the bore carefully.

4. Rock the gauge gently through the bore and identify the turning point on the indicator.

5. Record the deviation from the nominal dimension.

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

Frequently Asked Questions

What range does the Mitutoyo 511-212 small hole bore gauge measure?

It measures internal diameters from 0.24"–0.4" (6.096–10.16 mm).

Is a dial indicator included?

Yes, it is supplied with a 0.0001" indicator.

Do I need a setting ring?

A setting ring or master of known size is recommended for setting the gauge before measurement and achieving accurate readings.

Why does the grip matter?

Heat from the operator's hand can cause the gauge to expand slightly. The insulating grip reduces heat transfer by 50%, helping improve measurement stability.

Can the Mitutoyo 511-212 measure taper and ovality?

Yes. Measurements can be taken at different depths and positions within the bore to identify changes in diameter.

Can it be used for deeper bores?

Optional extension rods can be used when additional reach is required.

Which Mitutoyo model covers a larger bore range?

The Mitutoyo 511-206 covers 0.4"–0.74", while the 511-212 covers 0.24"–0.4".

Can the Mitutoyo 511-212 be recalibrated?

Yes. Periodic calibration through an ISO/IEC 17025-accredited calibration service can help maintain measurement traceability.

How should I store and care for the gauge?

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 use and arrange periodic calibration as required.

How do I order the Mitutoyo 511-212 small hole bore gauge in Kuwait?

Pricing is quote-based. Call or WhatsApp +965 9807 4888 with the model number and required quantity, and General Tech Services LLC will confirm pricing and availability.

For pricing and stock availability, contact General Tech Services LLC, Kuwait. Call or WhatsApp +965 9807 4888 to request a fast quote.