HSS-E annular cutter with universal shank DNHC-5

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D.O.C.  75mm
Universal shank for various magentic drills
Made of super tough high speed steel with mulit-cut geometry for ply-cutting and lower feiction to reach better performance of endurance and removal of chips
Applicable to hole cutting and process of annular groove on various magnetic drills and press.


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Q:I'm going to drill 10.5 of the thread. How many holes do I have to drill before tapping? How big is the tap?
In the national standard, the first series of thread sizes are M10 and M12, so the 10.5 corresponds to the M12 thread. Check the screw pitch, diameter, bottom table, check the corresponding M12 bottom 10.25mm.
Q:To do the M4 screw hole, what size holes must be drilled first?
According to my experience in the industry, since you are an aluminum piece, you should use kerosene or kerosene and cutting fluid when you tap. This will make the tapping more smooth and protect the tap and thread. In addition, the general aluminum pieces should be steel wire screw, otherwise, the teeth are easily broken.
Q:How big is the smallest bit?
Foreign trade HSS full grinding high speed steel straight shank twist drill, drill aluminum iron special twist drill / woodworking drill bit, relevant parameters:Model: YD0.5--14mm;Straight shank twist drill;Material: high speed steel;Blade diameter: manifold;Machine tools, tools, drills.
Q:What drills are used in tapping 304 stainless steel?
Now on the market is generally a bit alloy steel material whole bit, although the materials are the same, but due to the processing technology, various brands of product quality disparity. Imported and domestic alloy drills are also very different. Imported alloy bit usually adopts VHM micro grain hard alloy (ISO K40), the type of ultrafine particles (0.6 m) in the application of high performance drill and ordinary milling machine, the hardness and toughness of the ideal together. Take high quality alloy bit surface coating, such as chromium aluminum nitride (AlCrN) coating, the coating layer of coating, the thickness of 4 m, the micro hardness is up to 3200HV, the friction coefficient of 0.35, thermal stability up to 1100 degrees celsius. After coating, the drill color is bluish gray. After coating, the alloy drill can process low alloy steel and high strength steel. High steel can reach 54HRC.
Q:What do you mean by 5 times diameter drill?
The length of the chip slot is 5 times the diameter of the drill bit.5 times a bit is the drill depth that can reach 5 times the diameter of the drill. For example, a drill with a diameter of 10 can process 50 deep holes.
Q:How do you determine the speed of the drill? Is there any standard?
Large hole processing speed is not too fast, too fast, easy to make the head color (coke), resulting in turn annealing, eventually scrapped;Small rotor speed should be fast forward to the amount of slow, fast, easy to break, turn around, pay attention to crumbs.
Q:What kind of drill is drilled by 40Cr heat treatment with hardness above 40 degrees?
On the other hand, putting a blade on a large cutter is not necessarily a costly mistake. The cost of the CBN blade is 8-10 times that of the carbide blade. In the use of these advanced material blades, if the cutting speed and feed is not correct, will affect product quality and tool life. Because it is difficult to realize the stock reserve, it is necessary to evaluate the processing benefit and the whole process. Value from the whole process, if we consider the adjustment and replacement of the blade time, even if the use of carbide tools with low cost to meet the requirements of tolerances and surface accuracy, so the cost is expensive. Only when the production capacity, processing cycle and blade performance are well coordinated can the actual machining capability eventually be formed.
Q:What is the difference between steel and high-speed steel?
Tungsten is a kind of high speed steel was non alloy steel containing tungsten before, now use less, there are people on the use of power tools. Before the steel generally used for ordinary tool making hand taps, drills, saws and cutting speed is relatively low, the hardness is about 60~63HRC. High speed tool steel is now divided into low alloy, high performance and other types, widely used in the manufacture of various cutting tools.
Q:How to remove the electric clock bit
The outer part of the drill joint is provided with a plastic sleeve, and one hand pushes the plastic sleeve inward, and the other hand holds the drill bit to pull out the drill bit.
Q:What does SDS+ mean in a drill?
Also useful plus or max, SDS+ (SDS plus) said the four hole round handle drill, SDS Max said the five hole round shank drill, you think, the drill bit is fixed with 3 tunnel, a tunnel called plus, 5 very close, almost no room, so it is indicated by Max.

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