{"product_id":"mitutoyo-129-115-mechanical-depth-micrometer-100mm-4-rod","title":"Mitutoyo 129-115 Mechanical Depth Micrometer 100mm 4 Rod","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MITUTOYO 129-115 is a mechanical depth micrometer designed for precise depth measurement in metalworking, machining, and inspection applications. It features a ratchet stop thimble that delivers consistent measuring force on every use, reducing operator variability. The instrument covers a maximum measurement range of 100 mm using four interchangeable rotating rods, each with a 4 mm diameter. Graduation reads to 0.01 mm metric and 0.0001 inch imperial, with an accuracy of 3 micrometers. The hardened steel measuring faces resist wear under repeated production use. A satin chrome finish reduces glare under shop lighting. A measuring rod lock secures the selected rod during setup and transfer.\u003c\/p\u003e\n\u003cp\u003eThe 129-115 is suited for use in precision machining shops, tool rooms, quality control departments, and production inspection environments. It is commonly used to measure the depth of bores, slots, shoulders, and counterbores. The 101.6 mm base length provides stable seating across wider workpieces. Licensed machinists, quality inspectors, and toolmakers are the primary users. The instrument ships in a fitted plastic case, making it appropriate for both bench use and field inspection work where protection during transport is needed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e100 mm maximum measurement range using 4 interchangeable rotating rods\u003c\/li\u003e\n  \u003cli\u003eRatchet stop thimble ensures constant, repeatable measuring force\u003c\/li\u003e\n  \u003cli\u003eMetric graduation of 0.01 mm and inch graduation of 0.0001 inch\u003c\/li\u003e\n  \u003cli\u003eAccuracy of 3 micrometers for high-precision inspection use\u003c\/li\u003e\n  \u003cli\u003eHardened steel measuring faces for long-term wear resistance\u003c\/li\u003e\n  \u003cli\u003eMeasuring rod lock holds position during reading and transfer\u003c\/li\u003e\n  \u003cli\u003eIncludes fitted plastic storage and transport case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard mechanical depth micrometer suitable for general-purpose depth measurement on metal, machined, and inspected workpieces requiring metric and inch dual-graduation capability.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use is performed by machinists, quality inspectors, or toolmakers familiar with precision hand tools. Before measuring, ensure the base reference surface and workpiece are clean and free of burrs or chips that could affect seating. Use the ratchet stop thimble consistently to maintain uniform measuring force and avoid over-tightening. Store the instrument in its fitted case when not in use to protect the measuring faces and graduated surfaces.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 100 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation (Metric)\u003c\/strong\u003e: 0.01 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation (Inch)\u003c\/strong\u003e: 0.0001 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 3 micrometers (0.00012 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Rods\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRod Type\u003c\/strong\u003e: Rotating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRod Diameter\u003c\/strong\u003e: 4 mm (0.1575 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBase Length\u003c\/strong\u003e: 101.6 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBase Flatness\u003c\/strong\u003e: 0.000080 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Ratchet Stop\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasuring Face Material\u003c\/strong\u003e: Hardened Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Chrome\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Fitted Plastic Case\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: MITUTOYO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 129-115\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MITUTOYO","offers":[{"title":"Default Title","offer_id":51559080165682,"sku":"129-115","price":280.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/98d302bd9c697f3ce22434620fbe2953.jpg?v=1786426846","url":"https:\/\/voomisupply.com\/products\/mitutoyo-129-115-mechanical-depth-micrometer-100mm-4-rod","provider":"Voomi Supply","version":"1.0","type":"link"}