Drilling Aluminum Plate

Hot Products

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Multisize Straight Shank Twist Drill Bits For Drilling Metal Iron and Aluminum Drill Bit

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FAQ

What is a two center drill? What's the function?

There are two drill centers, one for passing through the casing and one for enlarging the diameterHey！ I can't help it! Specializing in the production of mine accessories. Cutter, cutter, drill bits, diamond mine anchor drill, cross wind drill, spiral drill pipe, anchor, mining machinery fittings, rock drilling tools

Why not hammer drill iron

Electric hammer drill (electric hammer drill), is the "two function drill" and "hammer" handheld electric tool, "rotary cutting drill", with the impact of the impact mechanism of driving impact drill bit, drill driven in rotation at the same time, there is a direction perpendicular to the rotation of the rotary drill the reciprocating motion of the hammer. For concrete, brick, tile, marble and other materials drilling. "Hammer" to drive the impact force of drill rod, used for concrete, bricks and other materials on the slotting, holes or broken concrete etc..

For 25 bit is much with the expansion screw

For 25 bit is much with expansion screws, fasteners consultant Yu Wenlong think for 25 bit M20 with expansion screws.

Angle action and characteristics of standard twist drill

The helix angle, the beta helix angle, is the angle between the most outer spiral line of the drill bit spiral groove and the axis of the drill bit. Since the lead of each point in the spiral groove is the same, the helix angle of the drill bit at different diameters is different, the helix angle at the outside diameter is the largest, and the closer the central helix angle is, the smaller the helix angle is. Increasing the helix angle increases the rake angle, which is beneficial to chip removal, but the drill bit stiffness decreases. The spiral angle of a standard twist drill is 18 to 38 degrees. For smaller diameter bit, the spiral angle should be smaller to ensure the rigidity of the drill bit.

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.

How do the front and back angles of the drill change? How does it affect drilling?

The front angle mainly affects the feed rate of the drill, which is determined by the hardness and abrasiveness of the metal.The rear angle mainly affects the cutting, cutting, the central axial force, reducing the force surface, so as to reduce wear.

The drill marked difference with hammer marks

There are signs and marks on the hammer drill bit, that this tool is the impact drill, when the adjusting knob is pointing to the side of the tool bit, only the rotation function, is also the only single drill; when the adjusting knob is pointing to the side of the tool is a hammer, impact drill function. The impact function used in wall drilling, drilling alone for wood, metal, and other drilling books

How are the drills classified?

The work part and the handle part constitute. The work part has two spiral grooves, similar to the "twist", hence its name. In order to reduce the drilling hole wall part and the guide friction between the drill shank twist drill to self direction decreases inverted cone diameter. The spiral angle of the twist drill mainly affects the rake angle, the blade edge strength and the chip removal performance of the cutting edge, usually 25 to 32 degrees. The spiral groove can be processed by milling, grinding, hot rolling or hot extrusion, and the cutting edge of the drill head is formed by grinding the front end of the drill bit. The cutting edge of a standard twist drill is 118, the cross edge angle is 40 degrees to 60 degrees, and the back angle is 8 degrees to 20 degrees.