{"product_id":"starrett-53073-small-hole-gage-0-4-to-0-5-inch-full-ball","title":"Starrett 53073 Small Hole Gage 0.4 to 0.5 Inch Full Ball","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 53073 is a small hole gage designed for accurate inside-diameter measurement in tight spaces. With a measurement range of 0.4 to 0.5 inches and a full ball contact style, it transfers bore dimensions directly to an outside micrometer for a precise reading. Overall length is 3.5 inches, making it easy to maneuver in shallow or restricted bores. Machinists, tool-and-die workers, and precision mechanics rely on this type of gage when calipers cannot reach or when bore finish demands a non-marring full ball contact surface.\u003c\/p\u003e\u003cp\u003eThe 53073 is suited for inspecting small bores, holes, and internal grooves in production and maintenance environments. It works in any application where a technician needs to transfer an inside measurement to a micrometer — including engine rebuilding, hydraulic component service, pump bore inspection, and precision machining setups. The full ball style distributes contact evenly across the bore wall, reducing the risk of measurement error from tool tilt.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMeasurement range: 0.4 to 0.5 inches\u003c\/li\u003e\n\u003cli\u003eFull ball contact style for even bore-wall contact and consistent readings\u003c\/li\u003e\n\u003cli\u003e3.5 inch overall length for access in shallow bores\u003c\/li\u003e\n\u003cli\u003eTransfers inside dimensions to an outside micrometer for a precise reading\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight at 0.016 pounds for one-handed use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard small hole gage for use with any outside micrometer covering the 0.4 to 0.5 inch range in precision machining, maintenance, and inspection applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSmall hole gages require no installation. Insert the ball end into the bore, expand the gage until light drag is felt against the bore wall, then lock the knurl and withdraw carefully. Transfer the set dimension to a calibrated outside micrometer immediately. Avoid over-expanding the gage inside the bore, as this can spring the ball and introduce measurement error.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0.4 to 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Style\u003c\/strong\u003e: Full Ball\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.016 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41111600\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: 53073\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541546303794,"sku":"53073","price":83.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1187b003fd4b1b456e003b127ffca506.jpg?v=1785879022","url":"https:\/\/voomisupply.com\/products\/starrett-53073-small-hole-gage-0-4-to-0-5-inch-full-ball","provider":"Voomi Supply","version":"1.0","type":"link"}