The high-strength sandpaper used by Marques Brownlee this time is made from a mixture of garnet and emery, and these two materials rank higher in the Mohs hardness table than metal materials such as steel knives or keys. This time the iPhone6 ​​display panel was not spared, and the last one became the high-strength sandpaper. However, everyone does not have to be too pessimistic. In the test, the performance of the iPhone6 ​​fuselage panel is significantly better than that of the iPhone5s. In reality, the environment in which the mobile phone is located rarely has access to high-hardness materials such as garnet and diamond. Everyone does not care too much.
In his latest video, Brownlee has done more research on the durability of glass. Brownlee tested the glass screen using Mohs hardness. The Mohs hardness standard divides the material hardness from small to large into 10 grades. High grade materials can be scratched on low grade materials.
The iPhone 5S uses a gorilla glass with a Mohs hardness of 6.8 and Brownlee's previous test knives only 5.5. The iPhone 5S's Home and rear camera mirrors feature pure sapphire, which has a Mohs hardness of 9.0.
In the second test, Brownlee used two high-quality sandpapers, of which the garnet sandpaper had a Mohs hardness of about 7.0 and the corundum sandpaper had a hardness of about 8.0. To compare the screen material, he used two sandpapers to rub the iPhone 6 front panel and the iPhone 5S gorilla display.
In theory, if the iPhone 6 front panel material is 100% pure sapphire, the two sandpapers will not leave any scratches.
But Apple fans who are looking forward to the "unbreakable" screen are disappointed. The iPhone 6 panel failed to withstand the test of two types of sandpaper. In terms of Mohs hardness, both sandpapers have higher hardness values ​​than gorilla glass but lower than pure sapphire. Of course, there are more scratches on the iPhone 5S screen.
In other words, the iPhone 6 display is obviously harder than the iPhone 5S display, but you certainly won't put the iPhone and sandpaper in your pocket.
Brownlee said in the video: "This does make sense. If you make a large panel with pure sapphire, this is a bit stupid. First, the phone will be more expensive. In addition, the user will not bend the screen like me. Of course, some parts of the phone also need a little flexibility. Therefore, pure sapphire is still very suitable for small parts such as Home button and rear camera mirror."
Brownlee pointed out that Apple has mastered a fusion process that reduces the possibility of glass flaking and cracking.
"In essence, this is a composite of sapphire, the overall hardness is stronger than the gorilla glass used in the old iPhone, or stronger than the glass used in other mobile phones. As you can see, this material does play a role." Brownlee said.
Common types and uses of pliers
Pliers have many functions and are used in many industries. The pliers used in different industries are also different. Generally, the more commonly used pliers are:
1. Wire stripper
Wire strippers are commonly used tools for internal electricians, motor repairs, and instrumentation electricians. They are composed of knife edges, crimping ports and clamp handles. They are mainly used for stripping plastic and rubber insulated wires and cable core wires.
2. Wire cutters
Also called a vise, it is a kind of clamp and cutting tool. It is composed of jaws, tooth edges, knife edges, guillotines and pliers handles. It is mostly used to pick up nails or break nails and iron wires.
3. Nozzle pliers
It can be divided into electrical and electronic categories. It is mainly used for cutting injection molding machine products, plastic products, and injection nozzles. It is also suitable for cutting metal products and electronic component pins.
4. Needle-nose pliers
Also known as trimmers, pointed pliers, and pointed pliers. They are composed of pointed tips, knife edges and pliers handles. They are generally made of 45# steel. They are used to cut single and multi-strand wires with thinner diameters and to give orders. Stranded wire joint bending, stripping of plastic insulation layer, etc., can be operated in a relatively small working space.
5. Curved nose pliers
Also called elbow pliers, its function is similar to that of needle-nose pliers without cutting edge, and it is suitable for use in narrow or recessed working spaces.
6. Flat nose pliers
It is a commonly used tool for assembly of metal parts and telecommunications engineering. It is generally used to bend metal sheets and metal filaments to make them into the required shape. In repair work, they are used to install and pull out pins, springs, etc.
7. Diagonal pliers
Mainly used to cut metal wires, flat-nose diagonal pliers are suitable for use in recessed working spaces.
8. Top cutting pliers
End-cutting pliers are similar to diagonal pliers. They are mainly used for cutting steel wires with the cutting edge at the top.
9. Water Pump pliers
The function is similar to a pipe wrench, but it is lighter, smaller and easier to use than a pipe wrench. However, the clamping force is not as good as a pipe wrench. Generally, it is only suitable for household non-professional emergency or simple installation of water pipes.
10. Slip joint pliers
The shape resembles a carp. The opening width of the jaws has two adjustment positions, which can be enlarged or reduced. It is mainly used to clamp round parts. It can also replace small nuts and small bolts with a wrench. It is often used in the auto repair industry.
11. Circlip pliers
Commonly known as circlip pliers, it is a special tool used to install inner and outer circlips, and can also be used to remove circlips. .
12. Vigorous pliers
It is mainly used for clamping parts for riveting, welding, grinding, etc. It can also be used as a wrench. Its characteristic is that the jaws can be locked and generate a large clamping force to prevent the clamped parts from loosening.
Wire Stripper,Needle-Nose Pliers,Wire Cutters,Curved Nose Pliers
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