{"product_id":"starrett-50978-micrometer-calibration-standard-125mm","title":"Starrett 50978 Micrometer Calibration Standard 125mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 50978 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers. Measuring 125mm in length, this calibration standard features spherical contact ends that provide consistent, repeatable point contact during calibration checks. It includes a heat insulating handle, which prevents thermal expansion errors caused by hand warmth during use. Dimensional accuracy is critical in precision measurement environments, and this standard is suited for use by machinists, quality control technicians, metrologists, and tool calibration specialists working in machine shops, manufacturing facilities, and metrology labs.\u003c\/p\u003e\n\u003cp\u003eThis calibration standard is used to set and verify outside micrometers in the 125mm range. It is appropriate for both shop-floor spot checks and formal calibration procedures. The heat insulating handle allows the technician to hold the standard without transferring body heat to the measuring surface, preserving dimensional integrity during the verification process. It is a practical reference tool for any environment where micrometer accuracy is routinely audited.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e125mm nominal length for calibrating micrometers in that measurement range\u003c\/li\u003e\n  \u003cli\u003eSpherical contact ends provide consistent point contact for repeatable readings\u003c\/li\u003e\n  \u003cli\u003eIncludes heat insulating handle to minimize thermal expansion errors during handling\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.5 pounds for easy bench or toolbox storage\u003c\/li\u003e\n  \u003cli\u003eSold individually for single-standard calibration setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with outside micrometers requiring a 125mm calibration reference standard. No specific compatible model numbers were provided in the product data.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration standards of this type are handled by metrology technicians or quality assurance personnel, not installed in the traditional sense. Always allow the standard to thermally stabilize in the measurement environment before use. Hold the standard exclusively by the heat insulating handle to avoid transferring body heat to the measuring surfaces. Store in a protective case away from temperature extremes and physical shock to preserve dimensional accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Length\u003c\/strong\u003e: 125mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Spherical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Insulating Handle\u003c\/strong\u003e: Included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 50978\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542702555442,"sku":"50978","price":76.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3b43e8acd954c3b917a937434f3b71ae_84ac1f77-cc7c-4715-bb5c-70eef93b7ad6.jpg?v=1785904771","url":"https:\/\/voomisupply.com\/products\/starrett-50978-micrometer-calibration-standard-125mm","provider":"Voomi Supply","version":"1.0","type":"link"}