{"product_id":"starrett-54148-o1-oil-hardening-flat-stock-tool-steel","title":"Starrett 54148 O1 Oil-hardening Flat Stock Tool Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54148 is an O1 oil-hardening flat stock bar made from AISI Type O1 tool steel, a widely used cold-work tool steel valued for its dimensional stability and ease of hardening in oil quench. This flat stock measures 0.5 inches thick, 0.625 inches wide, and 18 inches long, with a thickness tolerance of plus or minus 0.001 inches and an edge squareness of 0.003 inches per inch. It is supplied in the annealed (soft) condition and is intended for machining, grinding, and fabrication before hardening. Machinists, toolmakers, and die makers use this material to produce punches, dies, gauges, cutting tools, and similar toolroom components.\u003c\/p\u003e\u003cp\u003eO1 flat stock in this size range is a standard toolroom staple for job shops, maintenance departments, and production toolrooms. The 0.5 inch by 0.625 inch cross section is well suited to making small punches, forming blades, and precision fixtures where tight dimensional control before heat treatment is required. The 18 inch length allows for multiple blanks to be cut from a single piece, reducing material waste. This grade machines freely in the annealed state and responds predictably to conventional oil-quench hardening cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — stable, predictable hardening response\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for close-tolerance machining\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSupplied annealed for ease of machining prior to hardening\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening flat stock blank for general toolroom use, suitable for fabrication of punches, dies, gauges, and cutting tools wherever AISI Type O1 tool steel stock is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and drilling should be performed in the annealed state before heat treatment. Heat treatment of O1 tool steel, including hardening and tempering, should be carried out by qualified toolroom personnel following established metallurgical procedures and applicable shop safety practices. Secure the workpiece properly before any machining operation. Wear appropriate PPE when cutting or grinding tool steel.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI Type O1 Oil Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 54148\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542740009266,"sku":"54148","price":126.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_7770e836-f1cd-440a-aa41-f0520468b73f.jpg?v=1785905853","url":"https:\/\/voomisupply.com\/products\/starrett-54148-o1-oil-hardening-flat-stock-tool-steel","provider":"Voomi Supply","version":"1.0","type":"link"}