Twist drill uses

Twist drill use has a direct relationship with its style and type, the market has cobalt stainless steel twist drill, parabolic deep hole twist drill, gold twist drill, titanium plated twist drill, high-speed steel twist drill, long twist drill and so on. The purpose of these drills is to cut drilling tools, can be used for construction concrete drilling, steel plate drilling, electronics industry drilling and so on.

Composition and machining effect of twist bit

Twist drill bits are manufactured according to the standard twist drill, which is composed of the handle and neck and the working part. There are 6 kinds of Angle of twist drill bit, and different angles have certain differences in the accuracy and efficiency of drilling. Because the diameter of the twist drill is limited by the aperture, because the spiral groove can make the drill core more thin, so the stiffness of the drill is very low, and then the guidance of the drill is not clear, the axis of the hole is easy to cause deflection, so that the transverse edge centering is difficult, so that the drill is moving, the result is that the shape and position of the hole there is a large error. Also, because the front and back surfaces of the twist drill are consistent, and the front Angle and back Angle of each point of the cutting edge are different curves, which leads to poor cutting conditions, uneven speed, and ultimately large bit wear, so the drilling accuracy is low. The last point is that the drill curve causes the cutting speed to be uneven, which is easy to form spiral debris accumulation on the workpiece, and the debris then forms extrusion and friction with the hole wall, and the surface of the workpiece after the final processing is very rough.

Can twist drill into concrete wall What can drill drill

1. Drill metal

The drill metal is generally black drill bit, the drill bit material is generally high-speed steel, in the general metal materials (alloy steel, non-alloy steel, cast iron, cast steel, non-ferrous metals) drilling, with the use of metal drill bit.

However, pay attention to drilling on the metal material, the speed is not too high, easy to burn the edge of the drill. Some are now gold coated with rare hard metal films, materials such as tool steel, hardened by heat treatment. The tip is ground to equal angles on both sides and tilted back a little to form an acute edge. Drill steel, iron, and aluminum that have not been hardened by heat treatment, of which aluminum is easy to stick to the drill bit and needs to be lubricated with soapy water when drilling.

2. Drill concrete

Punch holes in concrete materials and stone materials, use a percussion drill, with a masonry bit, and the tool head material is generally cemented carbide.

Ordinary household, do not drill into the cement wall, use an ordinary 10mm specification electric hand drill.

3. Drill wood

In the wood material drilling, with the use of woodworking drill bit, woodworking drill cutting sales, the tool hardness requirements are not high, the tool material is generally general high-speed steel. There is a small point in the center of the drill tip, and the equal Angle on both sides is relatively large, or even no Angle. For good fixed position. In fact, you can drill wood with the same drill bit as you drill metal. Because the wood is easy to heat, brittle chips are not easy to come out, so you must slow down the speed and often quit to remove brittle chips.

4, drill tile, glass

In the higher hardness of ceramic tile and glass drilling using ceramic tile bit, tool material using tungsten carbon alloy, because the hardness of the tool is high, poor toughness, need to pay attention to low speed and no impact use.