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China color-coated corrugated roofing sheets are usually classified according to application location, wave height of plate type, lap joint structure, and material. Common classification methods are as follows:

1.Classification by application location -- roof panel, wall panel, floor slab and ceiling panel, etc. The use of China color-coated corrugated roofing sheet at the same time as the wall decoration plate, the architectural decoration effect is relatively new and unique.

2.According to wave height classification, it is divided into high wave plate (wave height = 70mm), a medium wave plate (wave height <70mm) and low wave plate (wave height <30mm).

3.According to the classification of substrate material -- divided into hot-dip galvanized substrate, hot-dip aluminum zinc plating, and hot-dip aluminum substrate.

4.It is classified according to China color-coated corrugated roofing sheet seam structure -- divided into lap joint, undercut and compression structure, etc. The middle and high wave plate should be used as the roof plate with higher waterproof requirements. Overlapping middle and high wave plate galvanized sheet to use floorboard; Lapped low wave plate should be used as a wall panel.

What are the main reasons for the loss of long life grinding wheel molds? Resin grinding wheel will wear out in use. In fact, users know that the resin grinding wheel itself is a consumable. What we are concerned about is the speed and loss of the wear of the resin grinding wheel.

1. The problem of the material of the main working parts of the long life grinding wheel is improperly selected. Poor material performance, not wear-resistant; mold steel has not been refined, has a large number of smelting defects; convex and concave mold, forging blank forging process is not perfect, there are hidden dangers of heat treatment.

2. The problem of structural design of the long life grinding wheel, the die structure is unreasonable. The slender punch has no design reinforcement device, and the discharge port is not well stocked, and the unloading force is too large to cause the punch to withstand the alternating load.

3. The manufacturing process of the long life grinding wheel is not perfect, mainly in the poor quality of the convex and concave die forging blank, the heat treatment technology and the process have problems, causing the convex and concave die to be impervious, and the soft point and the hardness are uneven.

4. The long life grinding wheel is not lubricated or lubricated but has a poor effect.

The fast cheap metal grinding disc works mainly for grinding. The grinding disc is divided into many different types according to different classification methods. The resin grinding disc is one of them. The resin grinding disc is a grinding disc processed by a bonding agent. The effect of different grinding discs is different. The grinding disc should also be operated according to the corresponding operation method to ensure the working quality and efficiency of the fast cheap metal grinding disc. On the resin grinding disc, we will introduce the problems to be paid attention to during the use. Let's see it!

1. Before using the resin fast cheap metal grinding disc, be sure to check the product for cracks, products and dumb sounds. If it is, it cannot be used.

2. The speed of the grinding disc must not exceed the specified safe working line speed.

3. Do not use the end face grinding disc exclusively. Please do not work with the end face of the grinding disc.

4. Special dressing tools should be used for dressing the grinding disc. Operators must wear protective goggles when trimming.

5. Each piece of resin grinding disc is marked with high use and line speed. Before installing the machine, be sure to confirm the speed of the machine. Do not exceed the speed marked on the fast cheap metal grinding disc to ensure that the machine has perfect protection device, the center hole of the grinding disc and the center axis of the grinding disc. Must match, otherwise it cannot be used.

6. The flanges on both sides of the fast cheap metal grinding disc must have the same shape and size. The flange diameter should meet the requirements, and there should be grooves on both sides.

7. When installing and fixing, be sure to be tight and appropriate. After the installation is completed, start the machine to idle for about one minute. No abnormality can be used.

There are many types of grinding wheels, such as fast grinding wheel for stainless steel, diamond grinding wheels, and resin grinding wheels. Compare diamond grinding wheel and resin grinding wheel today.

The diamond grinding wheel is super tough and has no elasticity at all. Its heat resistance is very good, but the production is complicated and the process cycle is long. Therefore, in the industry, the two kinds of grinding wheels are very different. The widely used fast grinding wheel for stainless steel is in the concrete cutting operation, and the resin grinding wheel is very suitable for the grinding of some metal products.

Diamond resin grinding wheel, which is a kind of grinding wheel combined with resin and diamond. It is mainly mixed together, so that mixed cutting can increase its strength when cutting, and can effectively control in cutting and grinding some materials. Cutting effect, etc., is more suitable for the grinding and cutting of some metal products.

The so-called resin is also a resin binder, and the fast grinding wheel for stainless steel manufactured by the resin is very high in strength, has certain elasticity, and has low heat resistance, so it cannot be used in some industries.

The high quality 9" grinding wheel has high hardness, high strength and strong grinding ability. It is mainly used for grinding high and hard alloys, non-metallic materials, cutting hard and brittle hard alloys, non-metallic minerals and so on. Such as cemented carbide, ceramics, agate, optical glass, semiconductor materials and wear-resistant cast iron, stone and so on.


Wheel characteristics

1. The grinding efficiency is high, and the high quality 9'' grinding wheel consumption is relatively slow.

2. Self-sharpness, low heat generation during grinding, not easy to block, reducing the phenomenon of work burns during grinding.

3. The grinding wheel has a certain elasticity, which is beneficial to improve the roughness of the surface of the workpiece, and is mainly used for the processes of fine grinding, semi-finishing, knife grinding and polishing.

4. The grinding wheel is low temperature curing, the production cycle is short, the equipment and supply process are relatively simple; because the resin has fluidity, it is easy to form a high quality 9'' grinding wheel with complicated surface.

The low price grinding disc can be said to be very common in our lives, and the application is quite extensive. Some manufacturers print arrows on the light side of the grinding disc. The number at the arrow indicates "grams". These plus The quality of the grams is to balance the disc for easy operation. Although the number of grams is marked, the balance mass cannot be added to the outside of the low price grinding disc. If the balance is to be added to the flange, the disc is High-speed rotation so a little imbalance will cause the grinding machine to vibrate and cause danger. The following grinding disc cutting chip manufacturers describe the balancing operation of the grinding disc.


When the low price grinding disc is balanced, the balance frame should be leveled with the level. If it is not leveled, the balance is meaningless.


When the low price grinding disc is mounted on the flange, the hole of the flange should be cleaned, and then the shaft for balancing should be installed and tightened with a nut. This is the same as the method of installing the grinding disc on the spindle of the conventional grinding disc, and then put it into balance. After the rack is placed, the heavy part of the grinding disc rotates downwards, and the lighter part turns to the top and stops. After that, the balance block mounted on the flange is adjusted to Light side and fixed with screws. If you only balance one turn, it is impossible, it is impossible, not so simple. Of course, there is almost no balance block corresponding to the imbalance, the imbalance on the circumference of the low price grinding disc and its Related to the distance to the center, when the flange is adjusted, 2 - 3 balance blocks are needed, and the balance can be achieved by changing the different positions. The correct balance method is to adjust the horizontal direction of the arrow to make it slowly stop. Balance In addition to the two balance bars, there are two thin, freely rotatable discs placed on both sides of the balanced disc axle. In addition, there is a balance table. You can also use the balance principle to check the vibration of the machine, you can also use the stroboscopic vibrometer to install it on the machine When measuring.


Then the above content is the balance operation method of the low price grinding disc manufacturer's description of the grinding disc. Our Henan Aurora Abrasive Tool Co., Ltd. produces the grinding disc cutting piece with strict quality requirements and sufficient strength. The rotating strength of the normal cutting piece reaches 1.5. Times is a Chinese grinding disc manufacturer and wholesaler worthy of your trust. For details, please visit the website.

At the beginning, depending on the occasion where the high efficient metal abrasive disc is used, it is different. The grinding disc is divided into cutting and wiping classes from the way of making the service. Most of the cutting machines use real-estate transfer type.

The description of the machine's work has a large description of the speed of work (>5.5KW) and the speed of small work (<3kw). The speed of cutting will also be cut off quickly (>80m/s) and generally cut off. In addition to this, a variety of materials are cut at the time of cutting, assuming stainless steel, titanium alloy, general steel, viscous metal, high carbon steel, non-metal, and the like. Different requirements for the performance of the grinding disc are different in different occasions, so it is important to make sure that the disc is the right choice.

Occasionally, we should choose the high efficient metal abrasive disc according to the occasion of our own service. The following should increase the safety factor, increase the labor production power, and reduce the cost of the service.

Generally referred to as a China grinding abrasive disc, it is a kind of alloy grinding disc which is composed of a refractory metal hard compound and a bonding metal and is produced by milling, forming and sintering process.


Commonly used metal compounds are tungsten carbide (WC), titanium carbide (TiC), tantalum carbide (TaC), and the like. The bonding metal is mainly cobalt, as well as nickel and a small amount of other metals. Wrought and precision of tungsten, tungsten-containing molybdenum and other high-speed steels, especially vanadium alloy disc steels, cobalt alloy disc steels, etc., one or more of these carbides and bonded metal drills The alloy grinding disc is often called a carbide grinding disc.


Such alloy China grinding abrasive discs generally have the characteristics of high hardness, good wear resistance, good red hardness, high chemical thermal stability, high compressive strength and corrosion resistance.

The grinding wheel made in China has a series of excellent performances and is widely used. The use is still expanding with the passage of time. The main uses are as follows:

1. Cutting tools: Carbide grinding wheels can be used as a variety of cutting tools. The amount of cemented carbide grinding wheel used in China's cutting tools accounts for about one-third of the total cemented carbide grinding wheel output, of which about 78% is used for welding tools and about 22% is used for indexable tools. The carbide grinding wheel for CNC tools only accounts for about 20% of the carbide grinding wheel for indexable tools. In addition, there are solid carbide grinding wheel drills, solid carbide grinding wheel small garden saw blades, and hard alloy grinding wheels. And other cutting tools.

2. Geological mining tools: Geological mining tools are also a major use of cemented carbide grinding wheels made in China.

3. Self-sharpness, low heat generation during grinding, not easy to block, reducing the phenomenon of work burns during grinding.

The diamond 4.5 inches grinding disc structure generally consists of a working layer, a base body and a transition layer.

The working layer, also known as the diamond layer, consists of abrasives, binders and fillers and is the working part of the grinding wheel. The transition layer, also called a non-diamond layer, consists of a binder, a metal powder, and a filler, and is a portion that firmly bonds the diamond layer to the substrate.

The base body is used to receive the abrasive layer and is firmly clamped to the grinding machine spindle by a flange during use. Generally, the metal bond product is selected from steel and alloy steel powder as the matrix; the resin bond is selected from aluminum alloy and bakelite as the matrix. It is made of aluminum, steel or bakelite and functions as a supporting working layer and a chucking tool. The quality of the grinding wheel and the accuracy of its use are closely related to the substrate.

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Bitcoin economics has not changed

YOU DON'T HAVE TO BUY A WHOLE BTC BITCOIN! Each bitcoin is equal to 100 million Satoshis, making a Satoshi the smallest unit of bitcoin currently recorded on the blockchain. Think of the Satoshi as the “cents” part of bitcoin. But unlike a penny that represents 0.01 USD, Satoshi represents roughly 0.00000001 BTC — or bitcoin to its eighth decimal.

Bitcoin forecast to 2029

Time model tends to forecast lower bound to prices. Stock-to-Flow model is a better model, click chart above to see details. It incorporates the halvings and better represents the monetary policy of Bitcoin. Hype cycles are expected around each halving as investors anticipate the price appreciation. Bitcoin has a fixed supply (maximum 21 million Bitcoins), therefore it cannot be devalued by central bank money printing (so called Quantitative Easing, QE). Bitcoin is also decentralised, meaning no single authority can control it. It has existed on the Internet for 10 years from 2009. It will be the money of the machines and Internet. Also described as digital gold due to its scarcity and high value.

This is a good short article that explains, why Bitcoin? Why Bitcoin?

The Stock-to-Flow Bitcoin charts above are referenced from

Dynamic stock and flow diagram, click for explanation on Wikipedia

HELP KEEP ADVERTISING FREE! The search engines, Google, Bing, etc. who make money from advertising, refuse to give a fair listing and ranking to this site. This is a form of censorship and unfair business practice by those large corporations who control the gateways to the Internet for their profit. If you want free advertising and believe in an open Internet for everyone, you can help to spread the word by sharing on social media. You will benefit by increasing the number of people who see your messages!

Be Your Own Bank
Bitcoin (BTC) is the people's money, owned by the people for the people. Not by a bank or country. What are you waiting for?

It gives you control of your money (individual sovereignty). Preserve your savings; they will increase in value over time. Easily send money anywhere. Government's can't take it! What are you waiting for? Get a free Bitcoin wallet today or, run your own full node.

If you do not know where to start, install a Mycelium or, Electrum wallet.

Jameson Lopp video explaining advantages of running your own Bitcoin Full Node, click here

Jimmy Song video explaining advantages of running your own Bitcoin Full Node, click here

Run your own Full Node and help the Bitcoin (BTC) network. Be Your Own Bank! There are currently (May 2018) about 138,000 full nodes globally. About 10,000 of these are listening for outside connections on the P2P network.

As people suddenly realise they don’t own their data on Facebook, how will they react when they realise they don't own the money in their bank accounts either?

The good news is government can't take your Bitcoin in your own full node. Not by legalised theft (inflation), nor by government bail ins. Realise that fiat money, $, €, ¥, £, yuan, Venezuelan Bolívar, Argentine Peso, Zimbabwean Dollar, etc. is crashing! In the last 100 years, all fiat currencies have lost 97-99% of their purchasing power, reducing your standard of living.


What is a Full Node?

Download Bitcoin Core

Instructions for running your Full Node of Bitcoin Core

Instructions for running your Bitcoin Full Node under Tor for anonymity, privacy and security of your money in your own bank.

With a Full Node behind the Tor network, your Full Node is difficult to trace.

You also can use a VPN for encryption of your Bitcoin transactions (can be used with or without Tor).

For VPN, the PCMAG Editor's Choice is NordVPN, click here.NordVPN

With a Bitcoin Full Node protected by VPN and / or Tor, you have complete control of your own private electronic bank. Anonymous like cash, but electronic, instant, unlimited by space time and appreciating in value.

Live map showing reachable nodes in listening mode on the Bitcoin network. Add yours to the map!

Video explaining The Halving (Litecoin/Bitcoin). Another reason why Bitcoin and Litecoin prices will increase significantly!
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Bitcoin transactions in real time, live from the blockchain:

For an imaginative audio visualisation of the Bitcoin blockchain from, see bottom of Mysittingbourne home page here. The base sound announces the creation of another block. A block is like a page in a book or ledger. Unlike a database that can be altered, it is a permanent, incorruptible record of value transactions on the blockchain. Pure mathematical truth!

Bitcoin digital gold

As more and more people are turning to physical gold, so they are turning to Bitcoin digital gold.

Bitcoin is trustless and decentralised. Like gold, it has limited supply. It can never be over-printed and devalued by a government. You can transfer funds anywhere, almost instantaneously and at much lower cost than bank transfer.

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The SpectroCoin debit card is recommended by WeUseCoins. Click here to see their comparison of Bitcoin debit cards.

If you do not know about Bitcoin, a good place to start is by getting a free wallet from,, or

bitcoin price chart

Physical Gold


Protect yourself and family from central bank currency debasement and inflation in asset prices, housing, food. There are rising levels of financial, economic and geopolitical risk in the world. In the last 100 years, all currencies have lost 97-99% of their purchasing power. Some believe that the final move to zero will take place in the next few years.

Currency debasement through money printing is the destruction of fiat money purchasing power - $, €, ¥, £, yuan, Venezuelan Bolívar, Argentine Peso, Zimbabwean Dollar...

True inflation and cost of living is currently 8% higher than the government reports. Real wages are falling rapidly and most people are taking out more and more debt to make ends meet. Only the wealthy minority and banks benefit from the current system.

Protect yourself. Buy physical, allocated gold, silver, platinum online and store it in safe vaults outside your jurisdiction (Switzerland, UK, USA, Canada and Singapore) or, at home. Physical gold has limited supply. Buy before the panic!

Look what happened in Cyprus (2013), Greece (2015) and Spain (Catalonia 2017). The lesson is that the money in your bank account is not really yours. It can be taken or frozen by the government just when you need it. Maybe it is not a good idea to keep too much money in the bank, especially when the next financial crisis comes!


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