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How to distinguish fake bearings?That's all you need to learn!

How to distinguish fake bearings?That's all you need to learn!

2021-07-27

Bearing is one of the important "joint" of mechanical equipment, once bought fake goods bearing, can bring a lot of damage to machinery and equipment, if large mechanical equipment because of fake goods bearing for repair, the losses during the basic is nearly ten thousand yuan, in order to let everyone know about fake goods bearing more, today to share some distinguish fake goods bearing techniques. What are the main characteristics of counterfeit bearings? What are the means of bearing fraud? How to distinguish true and false bearings? I hope it helps.

First, the characteristics of fake bearings

1. The appearance is basically the same as the real product, but its bearing capacity, limit speed, and so on are far from the real product.

2. In order to reduce the manufacturing cost, there is no requirement for precision.

3. In order to reduce the price, inferior quality bearing steel materials are used.

4. Non-standard packaging, transportation, and treatment methods have adverse effects on the accuracy of bearing products.

Two, the impact of fake bearings

1. Short service life. Bearings will be damaged in advance in use, which will directly increase the enterprise budget and cause economic losses.

2. Fake bearings are easily lead to dangerous accidents. Fake bearing damage is high, making the sudden rotation of the machine abnormal, sudden stop, or heat fire.

3. Disturb the relationship between procurement and distribution in the bearing market. In front of interests, the credibility between each other is destroyed, causing bearing manufacturers to have difficulty identifying and users to trust.

Three, there are eight main fraudulent means of bearing

1. Make bearings with iron and carbon steel (hardness is not enough) and repair waste bearings (accuracy is not enough).

2. Mark inferior bearings and bearings of small factories with factories' trademarks, and counterfeit the internal and external packaging and certificates of products of famous factories.

3. Fake the users, dealers, agents of famous big factories, and even fake the spot department of manufacturers.

4. Fake genuine bearings with defective bearings.

5. The ordinary class bearing is pretending to be the bearing with high precision series.

6. Fake goods mixed with good goods.

7. Fake goods sell at the price of genuine goods, sell at high prices, and use fake prices.

8. If you want a bargain, give a fake. If you want a good quality, give the real thing.

Four, the identification of true and false bearing skills

1. Outer packing and qualification certificate

(1) whether the outer packaging is clear: in general, the factory brand has its own special designers to design the external packaging, and arrange the production conditions of the factory for production, so the packaging from the line to the color block are very clear, no ambiguity.

(2) Whether the qualification certificate is standard: the qualification certificate of genuine bearings generally has its own anti-counterfeiting mark, and the counterfeiting means of fake bearings can not be too superb sometimes.

2. The steel seal

(1) The bearing body will be printed with brand words, labels, etc.

(2) The font of domestic steel printing is very small. Most of the factory products use laser etching, and the bearing is pressed before overheating treatment, so the font is small, but it is deep and very clear. The typography of counterfeit products is blurred, and because of the rough printing technology, the fonts float on the surface, and some can even be easily erased by hand.

(3) The stencil on THE NSK of Japan has no tactile sensation when touched by hand, but the presence of the stencil can be felt by gently touching the stencil with your nails. General domestic bearings or imitation bearings, steel marks are convex or concave in the bearing surface.

3. The big picture

(1) Whether there are appearance quality problems. Bearing is a precision mechanical product, the surface roughness must be below 1.6.

(2) whether there are muddy oil stains. Fake bearings are easy to leave thick oil stains, and they are sticky and thick in the hand, with a distinct smell of anti-rust oil. There is almost no trace of anti-rust oil on the original bearing.

(3) whether the goods are genuine.If there are CAK holes without cone shape, 2RS only unilateral seal and other obvious specifications and model errors.

4. Metallic sheen

The quality of bearings depends on the level of steel and heat treatment. Bearing chamfering is no longer polished after heat treatment. The genuine chamfering is quite smooth and has a gray metallic luster. Inferior goods are divided into two kinds, one is made of good quality domestic bearings, chamfering is also very smooth, but the color is not gray metallic luster; The other is made with domestic small factory goods false, chamfering is not smooth, there are bumps marks, not bright.

5. Listen to the voice

The left hand holds the inner sleeve of the bearing, the right hand toggle the coat to rotate it and listen to whether there is any noise. Since most of the counterfeit products are manufactured under backward conditions, they make noise when they are rotated. Completely manual workshop operation, in the production process, will inevitably be mixed with sand and other impurities, hidden in the bearing body, so when rotating, it will emit noise. This is the biggest difference between the original brands, which strictly follow production standards and operate with machines.

The loss caused by fake goods to buyers is not only the loss of money but also time. Even if the protection of the rights succeeds in the end, a lot of energy and time is wasted. Only from the source to avoid the purchase of fake goods, in order to fundamentally ensure the safety of the transaction.

fake bearings

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