{"product_id":"busch-4203-4-groove-carbide-twist-drills-3-32-shank-0-70mm-2-30mm","title":"Busch 4203 4 Groove Carbide Twist Drills on 3\/32\" Shanks .70mm to 2.30mm","description":"\u003cp\u003eThe Busch 4203 series carbide twist drills feature a 4-groove design optimized for cutting softer organic materials such as coral and pearls. Mounted on 3\/32\" shanks, these drills are available in 13 sizes ranging from 0.70mm to 2.30mm, making them a versatile addition to any jeweler's or craftsperson's drill collection. Sold individually, each drill delivers outstanding service life when used correctly.\u003c\/p\u003e\n\n\u003cp\u003eFor best results and longest tool life, use these drills in a drill press. As with any drill, excess leverage or canting can cause breakage. When working freehand, operate within the recommended speed range. These drills are \u003cstrong\u003enot suitable for glass, ceramics, or gemstones\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-groove carbide construction\u003c\/strong\u003e engineered for softer materials including coral and pearls\u003c\/li\u003e\n\u003cli\u003eOutstanding service life compared to standard twist drills\u003c\/li\u003e\n\u003cli\u003e3\/32\" shank fits standard flex shaft handpieces and drill presses\u003c\/li\u003e\n\u003cli\u003e13 sizes available from 0.70mm to 2.30mm\u003c\/li\u003e\n\u003cli\u003eSold by the piece — select only the size you need\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGroove Type\u003c\/th\u003e\n\u003ctd\u003e4-Groove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Materials\u003c\/th\u003e\n\u003ctd\u003eCoral, pearls, and other soft organic materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNot For Use On\u003c\/th\u003e\n\u003ctd\u003eGlass, ceramics, gemstones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreehand Speed Range\u003c\/th\u003e\n\u003ctd\u003e5,000–9,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrill Press Speed Range\u003c\/th\u003e\n\u003ctd\u003e8,000–14,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e0.70mm–2.30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003ePer piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eDrill Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.707\u003c\/td\u003e\n\u003ctd\u003e0.70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.708\u003c\/td\u003e\n\u003ctd\u003e0.80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.709\u003c\/td\u003e\n\u003ctd\u003e0.90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.710\u003c\/td\u003e\n\u003ctd\u003e1.00mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.711\u003c\/td\u003e\n\u003ctd\u003e1.10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.712\u003c\/td\u003e\n\u003ctd\u003e1.20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.713\u003c\/td\u003e\n\u003ctd\u003e1.30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.714\u003c\/td\u003e\n\u003ctd\u003e1.40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.715\u003c\/td\u003e\n\u003ctd\u003e1.50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.716\u003c\/td\u003e\n\u003ctd\u003e1.60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.718\u003c\/td\u003e\n\u003ctd\u003e1.80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.721\u003c\/td\u003e\n\u003ctd\u003e2.10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB128.723\u003c\/td\u003e\n\u003ctd\u003e2.30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse a starting guide hole when drilling freehand to improve accuracy and reduce breakage risk.\u003c\/li\u003e\n\u003cli\u003eDrill press use is recommended for maximum tool longevity.\u003c\/li\u003e\n\u003cli\u003eAvoid excess lateral pressure or canting, which can cause breakage.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNot for use with glass, ceramics, or gemstones.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Busch 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