{"id":1294,"date":"2025-11-24T14:17:28","date_gmt":"2025-11-24T14:17:28","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&p=1294"},"modified":"2026-09-28T08:41:20","modified_gmt":"2026-09-28T08:41:20","slug":"fully-ground-double-ended-hss-center-drill","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/ru\/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82\/fully-ground-double-ended-hss-center-drill\/","title":{"rendered":"Double-Ended HSS Center Drills \u2013 Fully Ground"},"content":{"rendered":"
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Double-Ended HSS Center Drills \u2013 Fully Ground Overview<\/h2>\n

These fully ground, double-ended HSS center drills are designed to prepare center holes and establish a controlled start for subsequent drilling. The supplied chart lists seven item codes with pilot diameter d from 1.0 to 5.0 mm, body diameter D from 4 to 11 mm, cutting length l from 1.0 to 5.5 mm and overall length L from 34 to 70 mm. Choose the complete size row for the holder and required hole form, and confirm the exact steel grade and cutting geometry for the ordered item.<\/p>\n

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\u0422\u0438\u043f \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430<\/span>Double-Ended Center Drill<\/span><\/div>\n
Tool Material<\/span>HSS<\/span><\/div>\n
Pilot Diameter d<\/span>1.0\u20135.0 mm<\/span><\/div>\n
Listed Items<\/span>7 Sizes<\/span><\/div>\n<\/div>\n

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Key Configuration<\/h3>\n
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\u25ce<\/div>\n
Double-Ended Geometry<\/div>\n

The product drawing shows a pilot and tapered cutting feature at both ends. Protect the inactive end during clamping.<\/p>\n<\/div>\n

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\u2195<\/div>\n
Size-Specific Reach<\/div>\n

Select the listed cutting length l and overall length L for the required access and setup.<\/p>\n<\/div>\n

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\u25c6<\/div>\n
Fully Ground Finish<\/div>\n

The original product description identifies a fully ground design; confirm the exact geometry and finish for the item code.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Key Product Advantages<\/h3>\n
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Center-Hole Preparation<\/h4>\n

Creates a starting feature for compatible centering operations.<\/p>\n<\/div>\n

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Two Cutting Ends<\/h4>\n

Allows use of the second end when the tool remains serviceable.<\/p>\n<\/div>\n

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Seven Item Codes<\/h4>\n

Each code has its own d, D, l and L dimensions.<\/p>\n<\/div>\n

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HSS Construction<\/h4>\n

Confirm the precise HSS grade for your workpiece and order.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Centering Applications<\/h3>\n

Use a suitable center drill to prepare center holes on a lathe or to establish a starting location before subsequent drilling on a CNC machine or drill press. Choose the tool by workpiece material, hole geometry, holder fit and machine rigidity.<\/p>\n

Application Note:<\/strong> The chart does not specify a point angle, center-hole standard, coating or cutting parameters. Verify those requirements before use; cutting length l does not establish finished center-hole depth.<\/div>\n<\/section>\n
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Workpiece Material Selection<\/h3>\n

The supplied sheet labels a 50 series for general-purpose cutting and a 60 series for higher-speed cutting, and illustrates carbon steel, alloy steel, cast iron, copper alloy and tool steel material groups. It does not map an individual item code to a series or specify the exact HSS grade. Confirm the ordered series and cutting data for the workpiece.<\/p>\n<\/section>\n

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Product Details & Available Configurations<\/h3>\n

All five images below are retained from the original product page. Some may show related configurations; use the seven-row chart in Specifications for the dimensions of this listed series.<\/p>\n

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