{"product_id":"boneham-sf328ex-slip-fixed-drill-bushing-0-159-in-id-steel","title":"Boneham SF328EX Slip-fixed Drill Bushing 0.159 in Id Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BONEHAM SF328EX is a slip-fixed drill bushing designed for precision hole-location applications in jig and fixture work. It features an inside diameter of 0.159 inches (No. 21 wire gauge) with a tolerance of +0.0001 to +0.0004 inches, a body outside diameter of 0.500 inches, and a length under head of 0.500 inches. Manufactured from steel with a hardness rating of 60 to 65 HRC, the SF328EX provides consistent bore accuracy and wear resistance through high-cycle drilling operations. Machinists, toolmakers, and fixture builders install this bushing where renewable guidance is required without full liner removal.\u003c\/p\u003e\n\u003cp\u003eThe SF328EX fits standard jig and fixture assemblies that call for an SF-series slip-fixed bushing per ANSI standards. The slip-fixed design allows the bushing to be removed and replaced without disturbing the liner bushing already installed in the jig plate, making it well suited for multi-operation setups where different drill sizes are needed at the same hole location. The head-type configuration and LS-1 compatible lock screw retain the bushing securely during operation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSF-series slip-fixed design allows bushing replacement without liner removal\u003c\/li\u003e\n  \u003cli\u003eInside diameter of 0.159 inches (No. 21 drill size) with +0.0001 to +0.0004 inch tolerance\u003c\/li\u003e\n  \u003cli\u003eBody outside diameter of 0.500 inches, length under head of 0.500 inches\u003c\/li\u003e\n  \u003cli\u003eSteel construction hardened to 60 to 65 HRC for long service life\u003c\/li\u003e\n  \u003cli\u003eHead outside diameter of 51\/64 inches, head height of 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003eLS-1 compatible lock screw seat for positive retention in the liner\u003c\/li\u003e\n  \u003cli\u003eRenewable bushing — replaces without machining the jig plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard liner bushings and jig plates requiring an SF-series slip-fixed bushing. Accepts LS-1 lock screws. Conforms to ANSI bushing standards for SF-type drill bushings.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by toolmakers or machinists working with drill jig assemblies. Ensure the liner bushing bore and the jig plate are free of chips and burrs before seating the SF328EX. The lock screw must be engaged to prevent rotation or withdrawal during drilling. Do not press or hammer the slip-fixed bushing into the liner — it is designed to slip in and out by hand with the lock screw released.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBushing Type\u003c\/strong\u003e: Slip-Fixed (SF)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.159 inches (No. 21 wire gauge)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter Tolerance\u003c\/strong\u003e: +0.0001 to +0.0004 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Outside Diameter\u003c\/strong\u003e: 0.500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 0.500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Outside Diameter\u003c\/strong\u003e: 51\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Head\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 60 to 65 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRenewable Bushing\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLock Screw Compatibility\u003c\/strong\u003e: LS-1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounterbored\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ANSI\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: BONEHAM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: SF328EX\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BONEHAM","offers":[{"title":"Default Title","offer_id":51734772351282,"sku":"SF328EX","price":23.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d089b0a7b36c5d4ca8f716b32e5b0d8a_153aa069-6d83-47b2-9f5b-c66bbe6fa26d.jpg?v=1788766853","url":"https:\/\/voomisupply.com\/products\/boneham-sf328ex-slip-fixed-drill-bushing-0-159-in-id-steel","provider":"Voomi Supply","version":"1.0","type":"link"}