{"product_id":"mitutoyo-112-189-point-micrometer-1-inch-ratchet-stop","title":"Mitutoyo 112-189 Point Micrometer 1 Inch Ratchet Stop","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MITUTOYO 112-189 is a mechanical point micrometer designed for precision measurement of grooves, steps, keyways, and similar recessed or narrow features that standard flat-anvil micrometers cannot reach. It covers a measurement range of 0 to 1 inch with a resolution of 0.00005 inches and an accuracy of 0.00015 inches. The 38mm throat depth provides clearance for measuring deep or offset features, while the ratchet stop ensures consistent, repeatable measuring force across readings. Both the spindle and anvil are tipped at a 15-degree point angle, allowing access to tight geometries that wider contact faces would bridge over.\u003c\/p\u003e\u003cp\u003eThis instrument is suited for precision machining, tool and die work, and quality control applications where direct measurement of grooves, splines, or step features is required. The 18mm head diameter and 0.5039-inch point length accommodate a range of workpiece configurations. It is commonly used by machinists, metrology technicians, and manufacturing QC inspectors working to close tolerances in both job shop and production environments. The ratchet stop mechanism makes it practical for high-volume repetitive measurement tasks where operator-to-operator consistency matters.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e15-degree point angle on both spindle and anvil for access to narrow grooves and recessed steps\u003c\/li\u003e\n\u003cli\u003e38mm throat depth for clearance on deep or offset workpiece features\u003c\/li\u003e\n\u003cli\u003eResolution of 0.00005 inches with accuracy to 0.00015 inches\u003c\/li\u003e\n\u003cli\u003eRatchet stop delivers consistent measuring force for repeatable results\u003c\/li\u003e\n\u003cli\u003eSteel spindle and anvil construction for durability and wear resistance\u003c\/li\u003e\n\u003cli\u003eTUV certified for quality and measurement reliability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-use point micrometer for measuring grooves, steps, keyways, and similar narrow or recessed features across a 0 to 1 inch measurement range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003ePoint micrometers require no installation but should be handled and stored by calibrated metrology or QC personnel following standard instrument care practices. Clean contact points before each use and verify the zero setting against a known reference before taking measurements. Avoid dropping or overtightening the thimble, as either can shift calibration or damage the spindle point.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0 to 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution\u003c\/strong\u003e: 0.00005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.00015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.001 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Point Angle\u003c\/strong\u003e: 15 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnvil Point Angle\u003c\/strong\u003e: 15 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Length\u003c\/strong\u003e: 0.5039 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Diameter\u003c\/strong\u003e: 6.35mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThroat Depth\u003c\/strong\u003e: 38mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpindle Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnvil Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery\u003c\/strong\u003e: 1x SR44 (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification\u003c\/strong\u003e: TUV Certified\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 112-189\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MITUTOYO","offers":[{"title":"Default Title","offer_id":51558924976434,"sku":"112-189","price":387.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c5debcfdf0c3ebe584b49329d41edebc.jpg?v=1786423109","url":"https:\/\/voomisupply.com\/products\/mitutoyo-112-189-point-micrometer-1-inch-ratchet-stop","provider":"Voomi Supply","version":"1.0","type":"link"}