HSS-E annular cutter with fein thread shank DNHL-4

HSS-E annular cutter with fein thread shank DNHL-4 System 1

HSS-E annular cutter with fein thread shank DNHL-4

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 10 pc

Supply Capability:: 5000 pc/month

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DNHL-4

D.O.C. 50mm
Unit：mm
◎ M18*6/P1.5 thread shank , Suitable on Fein magnetic 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

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Type	Size
DNHL-40120	12*50
DNHL-40130	13*50
DNHL-40140	13*50
DNHL-40150	13*50
……‍‍	……
DNHL-40470	13*50
DNHL-40480	13*50
DNHL-40490	13*50
DAHK-40500‍‍‍	40*50‍

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Q: New drills usually need sharpening before they can be used. Why?: The back angle of the new drill is grinded by the drill mill, which is made of special grinding bit equipment, and the angle is very straight. There is no circular arc R transition. If directly used to drill, drill will produce vibration and beating, the hole will be multi prismatic. Therefore, the new drill is usually used to drill the drill bit again according to the drilling condition, to grind out the back angle of the arc transition and the proper vertex angle, so that the drill bit can be drilled steadily.

Q: How to change the drill bit of impact electric drill?: Install the drill bit: or the handstand impact drill, the left hand down to the plastic ring, the right hand with the drill, rotating around the insertion

Q: What bits of percussion drills are made of?: Purpose: hard alloy is widely used as a tool material, such as turning, milling, planing, drilling, boring, used for cutting cast iron, non-ferrous metals, plastics, chemical fiber, graphite, glass, stone and steel, can also be used for cutting steel, stainless steel, high manganese steel, tool steel and other hard processing materials.

Q: How to polish drill bit: Grinding twist drill is the front edge of grinding, we do mechanical processing, the new twist drill must be polished, and then used. A mill can also grind, but it must be worn by those who can grind it. Percussive drilling and percussion drills are necessary for drilling. Twist drills for metal.

Q: The basic angle of twist drill: The main deviation angle is RM, and the main angle is the angle between the tangent of the main cutting edge and the feed direction of the m. The base surface of the twist drill is the plane at which the main cutting edge is selected, including the axis of the drill bit. The bit is not the main cutting edge through the axis line, so each point on the cutting edge of different base, the main angle points are also different. When the angle of grinding, the main angle can be determined. The main deflection angle and the vertex angle are two different concepts.

Q: What's the difference between a deep hole drill and an ordinary bit?: Ordinary drills are of relatively low hardness, impact resistance and wear resistance. The drilling accuracy, drilling speed and the drilling speed of conventional drills can not be compared with those of deep hole drilling.

Q: What does M3x0.5 mean by tapping a drill bit?: M3 * 0.5 represents a 3 mm screw with a pitch of 0.5 mm. With a diameter of 3 minus 0.5 equals 2.5 pitch dia. It is to drill 2.5 holes with a drill, and then tap with a M3 tap.

Q: What is the geometric angle of the drill bit?: A TRUSCO bit is a tool used to drill through holes or blind holes in solid material and to expand existing holes. The TRUSCO bit acts on its head, and its cutting edge and the cross edge act as a tool. In order to make the taper surface of the cutting part not touching the workpiece, the value of the rear angle and back angle should be selected according to the material of the workpiece.

Q: How do you drill a drill?: 6, after grinding, the drill rotation, simulation, drilling, cutting the status of inspection, to see if there is no wrong place, if there is further grinding;7, grinding the cross edge, that is, symmetrical sharpening drill bit after the blade;The 8 big bits can be sharpened by grinding on the side of the grinding wheel;9, steel bad twist drill, the vertex angle can be properly worn. .

Q: How do you tell which materials are used in the test?: The commonly used twist drills are the hardness HRC62~68 of high speed steel (W18Cr4V or W9Cr4V2) after quenching.

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