{"product_id":"spi-91-313-7-v-block-set-90-degree-hardened-steel","title":"Spi 91-313-7 V-block Set 90 Degree Hardened Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 91-313-7 is a hardened steel V-block set designed for precision workholding and inspection tasks in machine shops, tool rooms, and metrology applications. Sold as a matched 2-block set, each block features a 90-degree V-angle and accepts round stock from 0.5 inches minimum up to 1-3\/32 inches maximum capacity. The blocks measure 2 inches in overall length, 1-1\/2 inches in overall width, and 1-1\/2 inches in overall height. Two clamps are included. Hardness is rated at 50-60 Rc, supporting consistent performance in close-tolerance setups. Machinists, quality technicians, and tool and die professionals are the primary installers and users of this product.\u003c\/p\u003e\u003cp\u003eThese V-blocks are suited for use in precision grinding setups, layout work, roundness inspection, and cylindrical part holding on surface plates or machine tables. The 90-degree V-angle accommodates a range of cylindrical workpieces commonly encountered in production and inspection environments. The matched pair format supports simultaneous support of a workpiece at two points, which is standard practice for shaft and pin inspection or grinding operations requiring axial alignment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSold as a matched 2-block set for consistent two-point workpiece support\u003c\/li\u003e\n\u003cli\u003e90-degree V-angle accommodates cylindrical stock from 0.5 to 1-3\/32 inches diameter\u003c\/li\u003e\n\u003cli\u003eHardened steel construction at 50-60 Rc for durability in demanding shop environments\u003c\/li\u003e\n\u003cli\u003eV parallelism of 0.0003 inches and V accuracy of 0.0002 inches for precision setups\u003c\/li\u003e\n\u003cli\u003eSquareness of 0.0003 inches per inch supports accurate layout and grinding operations\u003c\/li\u003e\n\u003cli\u003eTwo clamps included for securing workpieces during use\u003c\/li\u003e\n\u003cli\u003eStyle A configuration; non-magnetic design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard Style A V-block set suitable for use in general precision machining, inspection, and layout applications requiring 90-degree V-block workholding of cylindrical parts up to 1-3\/32 inches in diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eV-blocks are typically set up by machinists or quality technicians on surface plates or machine tool tables. Clean the mounting surface and block base thoroughly before positioning to ensure accurate seating. Secure workpieces using the included clamps before performing any grinding, inspection, or layout operations. Do not use these blocks as a substitute for properly rated vises or fixtures in heavy cutting operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eV Angle\u003c\/strong\u003e: 90 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Capacity\u003c\/strong\u003e: 0.5 inches (12.70 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Capacity\u003c\/strong\u003e: 1-3\/32 inches (27.78 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches (50.80 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 1-1\/2 inches (38.10 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: 1-1\/2 inches (38.10 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hardened Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 50-60 Rc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV Parallelism\u003c\/strong\u003e: 0.0003 inches (8.00 micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV Accuracy\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.0003 inches per inch (8.00 micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: 2-Block Set with 2 Clamps included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 91-313-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690848420146,"sku":"91-313-7","price":101.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ec3aac0826ba369f852bb37d327d722a.jpg?v=1788276243","url":"https:\/\/voomisupply.com\/products\/spi-91-313-7-v-block-set-90-degree-hardened-steel","provider":"Voomi Supply","version":"1.0","type":"link"}