Measuring and Layout — FAQ
Why choose Mitutoyo over other caliper brands?
Mitutoyo maintains stricter manufacturing tolerances and uses higher-grade materials than competitors. Their calipers hold accuracy longer, resist wear better, and provide consistent measurements across decades of use. The initial investment pays for itself through reduced calibration frequency and replacement costs.
Should I buy digital or traditional vernier calipers?
Buy digital for speed and ease of reading in high-volume production. Choose vernier for reliability in harsh environments, battery-free operation, and developing fundamental measurement skills. Professional shops often own both: digital for routine work and vernier as a trusted backup.
How often should I calibrate my Mitutoyo caliper?
Calibrate annually for professional use or after any drop/impact. Monthly checks against a known standard (like a gauge block) verify zero accuracy. If measurements seem inconsistent or the jaws show wear, send for professional calibration immediately. Proper storage in a case extends calibration intervals.
What does ±0.03mm accuracy actually mean?
It means any measurement will be within 0.03mm of the true value 95% of the time. This includes potential errors from jaw misalignment, temperature variation, and user technique. For a 10mm measurement, the actual dimension is between 9.97mm and 10.03mm. Always consider this tolerance when machining to tight fits.
Can I use Mitutoyo calipers for both inside and outside measurements?
Yes, all Mitutoyo four-way calipers measure outside dimensions (OD), inside dimensions (ID), depth, and step features. Use the main jaws for OD, the smaller upper jaws for ID, the depth blade for depths, and the jaw faces for step measurements. Each function requires proper technique for accurate results.
What's the difference between resolution and accuracy?
Resolution is the smallest increment you can read (0.02mm), while accuracy is how close the measurement is to the true value (±0.03mm). A caliper can have fine resolution but poor accuracy if it's miscalibrated. High resolution without matching accuracy creates false precision—always check both specifications.
