The Mitutoyo dial bore gage set with indicator 50150mm 511703 combines high-grade alloy steel measuring anvils with a precision dial indicator for reliable inner diameter checks. Technicians favor this configuration when verifying tight tolerances in hydraulic cylinders, bearings, and bore assemblies on machining centers.
Designed for repeatable, toolroom-grade accuracy, the set supports 50 to 150 mm measuring range with robust hardened contacts. The 511703 dial indicator delivers clear deflection readings and stable response, making setup faster on the shop floor.
| Model | Measuring Range | Anvil Material | Indicator | Resolution |
|---|---|---|---|---|
| 50150mm set with 511703 | 50–150 mm | Hardened alloy steel | 511703 dial indicator | 0.01 mm |
| Travel | 8 mm indicator stroke | Ceramic jewel contact | Stainless steel beam | 0.01 mm graduations |
| Calibration | ISO/IEC 17025 traceable | Plated anti-wear finish | Shock-resistant movement | ±0.02 mm accuracy |
| Accessories | Adjustable anvils | Storage case | Protective cover | Gauge block pair |
Mounting and Handling of the 50150mm Set
Correct mounting of the dial bore gage set minimizes tilt error and protects the steel anvils. Use the right positioning force, then lock the indicator to a stable magnetic or surface plate before reading.
Handle the 511703 indicator with care, avoiding shock or sudden contact with hard edges. Maintain cleanliness on the measuring faces to preserve accuracy and reduce wear across the 50 to 150 mm range.
Measurement Procedure for Bore Inspection
Following a repeatable measurement procedure ensures consistent bore results with this dial bore gage set. Setup, zeroing, and rocking the tool reveal size and form deviations quickly.
Position the anvils inside the bore, apply the proper measuring force, and read the indicator at multiple angular positions. Record values to compare against the drawing tolerance band for diameter and cylindricity.
Adjustment and Calibration Practices
Periodic adjustment keeps the indicator linearity and return to zero within specified limits. Skilled technicians check the 511703 dial indicator against gauge blocks and master pins to verify performance.
Use calibration certificates to track deviations over time. Schedule recalibration at intervals that match the workload and environmental conditions of your machining area.
Recommended Practices and Key Takeaways
- Mount the dial bore gage on a stable surface to avoid indicator shock
- Clean anvils and contact points before each use to maintain accuracy
- Zero the indicator in the reference bore at the target diameter
- Use multiple angular readings to assess taper and ovality
- Follow a regular calibration schedule aligned with your inspection volume
FAQ
Reader questions
How do I set zero on the indicator for a new bore measurement?
Position the anvils inside the reference bore at the nominal diameter, lock the micrometer screw, and rotate the indicator bezel to set zero at the center of the measuring range.
What measuring force should I apply with this set?
Apply a consistent, light seating force until the indicator shows slight movement, then stabilize the tool to read the peak value without overcompressing the contacts.
Can I measure tapered bores using the 50150mm set?
Yes, by rocking the gage axially while traversing the bore, you can detect taper and assess the form deviation across the 50 to 150 mm range with the dial indicator.
How often should I calibrate the 511703 dial indicator in this set?
Schedule calibration every six months or sooner in high-volume environments, and always verify linearity with gauge blocks before critical inspection jobs.