Q:What's the difference between full mill and rolling twist drill?

A word is not clear, the different processing technology, the high production cost of drilling grinding, rolling and drilling cost is relatively low, also has the gap, drill grinding durability is more than fifty percent higher than in the rolling, and workpiece cutting performance, drill to drill a lot, I was the production

Q:How big are the 8 bits that have worked up?

A drill bit (Drills) is a tool used to drill through holes or blind holes in solid material and to expand existing holes. The commonly used drills are mainly twist drills, flat drills, center drills, deep hole drills and casing drills. Reaming drill and countersink drill is not in solid material drilling, but it is also customary to put them in a bit.

Q:What is the geometric angle of the drill bit?

The commonly used bit, roughly divided into rolling twist drill, full grinding drill, is divided into straight shank drills, taper shank drill and 1/2 drill, double auger, single head, short drill center drill, six angle shank drill, electric hammer drill, impact drill, the material can be divided into 4241# and 4341#. 9341#, M35, M42, 6542#, and alloy etc..

Q:What drill is best?

The drill bits are of high speed steel, of which 439365 are cobalt and cobalt is the best

Q:How big are the 8 bits that have worked up?

A drill bit (Drills) is a tool used to drill through holes or blind holes in solid material and to expand existing holes. The commonly used drills are mainly twist drills, flat drills, center drills, deep hole drills and casing drills. Reaming drill and countersink drill is not in solid material drilling, but it is also customary to put them in a bit.

Q:Which material, gb1436 and 6542, has a good drill?

6542 refers to the content of various elements in this material. For example, 6542 is W (tungsten) content of about 6%, Mo content of 5%, Cr content of about 4%, V content of about 2%.

Q:An expansion screw with a diameter of 20. How much impact bit do you need to use?

The table above is the reference value of the match;2, the specific adaptation, also need to be flexible according to the actual situation, if the fixed place expansion screw is loose, need to be reduced if the fixed impact drill specifications; expansion screws tight place, according to the above table match.

Q:The difference between left and right drills used to drill holes

The use of left-hand drill, mostly because the machine tool design can not meet the needs of the right-hand bit, as some spindle can not meet the right-hand thread, you must use the left-hand thread. The specific situation is not practical, it is difficult to say too clear.

Q:What are the main points of drill grinding?

Make sure that the edge of the blade is symmetrical to the axis and the sides are slowly repaired. When the edge is sharpened and the other side is sharpened, the edge must be in the middle of the axis of the drill bit, and the edges of both sides must be symmetrical. The symmetry of the experienced teacher will look to the light point, slowly grinding. Drill cutting edge angle is 10 DEG -14 DEG, after large angle, the cutting edge is too thin, when drilling vibration badly, orifice in three edge or pentagon, the chip is acicular; small angle, drilling large axial force, easy to cut, the cutting force increases, temperature rise drill, severe fever, or even drilling. For after the angle grinding, the tip of two edged, symmetrical, drilling bit, chip light, no vibration, no enlarged aperture.

Q:How do I turn on the electric bit?

There are two kinds of commonly used, a card, a clip, clip to press the drill chuck can pull out the drill, clip with keys to open, can also be used when a round steel chisel, hammer knock loose counterclockwise on the line.