Premium 19-Piece Twist Drill Bit Set for Metal and Wood

Product Description

19PCS TWIST DRILL SET
H1901-1 black finished
H1901-2 edge ground
H1901-3 edge ground tin coated
H1901-4 fully ground bright
H1901-5 fully ground black finished
H1901-6 fully ground tin coated
Size(mm):1.0-10.0*0.5mm
Packing Inner :Plastic Box
Outer :Carton
N.W./G.W:28/29kgs
Meast:47*41*17cm(40Sets/Carton)
Generally, black drill bits are used to drill metals, and the drill bits are made of high-speed steel. Drilling holes are made on common metal materials (alloy steel, non-alloy steel, cast iron, cast steel and non-ferrous metals), and metalworking drill bits are used together. However, attention should be paid to drilling holes in metal materials, and the rotating speed should not be too high, which will easily burn out the bit edge.

At present, some golds with rare hard metal films are made of tool steel and hardened by heat treatment. The tip is ground at equal angles on both sides and tilted back a little to form an acute knife edge. There are no steel, iron and aluminum hardened by heat treatment, among which aluminum is easy to stick to the drill bit, so it needs to be lubricated with soapy water when drilling.
2. Punch holes in concrete materials and stone materials, and use impact drills in combination with masonry drill bits, which are generally made of cemented carbide. Ordinary household, do not drill holes on the concrete wall, just use ordinary 10mm hand electric drill.

3. Drill wood. Drilling holes in wood materials, with the use of woodworking drill bits, the cutting volume of woodworking drill bits is large, and the tool hardness is not high. The tool materials are generally high-speed steel. There is a small tip in the center of the drill tip, and the equal angle between the two sides is relatively large, even there is no angle. Used for good fixing position. Actually, you can drill wood with a drill bit that drills metal. Because wood is prone to heat and crisp chips are not easy to come out, it is necessary to slow down the rotation speed and often quit to remove crisp chips.
4. Tile drill is used for drilling holes on ceramic tiles and glass with higher hardness, and tungsten-carbon alloy is used as the cutting tool material. Because the cutting tool has higher hardness and poor toughness, it is necessary to pay attention to low speed and no impact.