Hexagon Shank Straight Groove Pagoda Drill Nitrided Black Step Drill Bag Reaming Drill Hole Punching Drill
Описание
Features: - Made from high quality High Speed Steel - Ideal for using to cut holes in a variety of materials including steel brass wood plastic etc. - Heat treated and highly polished. Drills perfectly round holes in steel brass plastic wood etc. - Hex shanks design in order to prevent slippage when in chuck - Two flute design drives faster smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps The Cutters Come in the Following Sizes: S: 4-12mm (4mm 6mm 8mm 10mm 12mm) 5 Steps. M: 3-12mm (3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm) 10 Steps. L: 4-20mm (4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm)9 Steps. XL: 4-32mm (4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm 24mm 26mm 28mm 30mm 32mm)15 Steps. Suitable material: - Workpieces with general hardness such as wood plastic PVC plate iron plate plate thickness within 3mm. Please note that stainless steel and spring steel are not applicable. Function: - Deburring Chamfering Cutting or expanding holes - Supporting tools: Pistol drill Hand drill Charging drill Bench drill. Attention: - Because of the outer diameter of each step of the step drill is gradually expanded then the corresponding cutting resistance and linear velocity will also be gradually increased. - Owing to the step drill is completely dependent on the inclined edge that is only with 1mm length If the feed speed is too fast when drilling it will be easily to be annealing caused by abrasion of the oblique edge. - Please give a downward force when drilling do not press down too hard to avoid the edge wearing. - Water injection cooling while working it can effectively extend the service life of the drill bit especially in the case of continuous drilling Package included: 1PC STONEGO Step Drill Bit
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