According to the market inspection of bearings, there are currently 8 types of fraud in bearing distribution:
Supply bearing
1. Bearings made of iron and carbon steel (hardness is not enough) and repairing scrap bearings (not enough precision);
2. Put the inferior bearing and small factory bearing on the trademark of Dachang, and counterfeit the internal and external packaging and certificate of the famous big factory products;
3, counterfeit famous manufacturers, distributors, agents, and even counterfeit manufacturers spot sales department;
4. Pretend to be a genuine bearing with a defective bearing;
5, the ordinary grade bearing type into a D-class bearing;
6, breaking into fake goods in good goods;
7, fake goods sell genuine price, genuine sell D-class price, use fake price book;
8, to bargains to give fake goods, to good quality to the real goods.
Quality supervision experts remind consumers to buy qualified bearings, first of all to observe whether the outer packaging is clear, most of the genuine use of the stamping technology, and before the heat treatment, the font is pressed, so the font is small, but the recess is deep, very clear . The fonts of counterfeit products are vague, floating on the surface, and some can even be erased by hand. Secondly, if there is any turbid oil on the surface, if the anti-rust technology is not at home, it is easy to leave a thick oil stain, which is very sticky in the hand. At the same time, we must also pay attention to the choice of products with uniform chamfering and no noise.
Concerned about surprises
Tag: bearing supplier chamfer carbon steel big factory
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Industrial applications editor broadcast
Whetstone sintered corundum (ruby) : A kind of microcrystalline corundum product sintered at high temperature. It has a compact and delicate structure and high hardness and strength.
The products are rosy red. The products are small grinding wheel type whetstone, standard type whetstone and grinding head type whetstone. When grinding the workpiece, it can maintain sharp edge and stable geometry for a long time.
It is suitable for forming and grinding of instrument industry, precision parts, micro cutting tools, tools and precision abrasive tools, etc. The precision surface roughness of machining can reach about 0.05μm.
Product SPECIFICATIONS: flat sand wheel whetstone with diameter less than 100 for small grinding wheel type, whetstone with various geometric shapes less than 200*50*25 for standard type, whetstone with diameter less than 25 for grinding head type.
Grinding method
About diamond grinding paste, particle size from W40 to W0.5. W40 is the coarsest, with a large amount of grinding, and W0.5 is the smallest. It is used for polishing, and it does not anneal, and it can also grind the hard knife.
Method of use:
The coarse W40 abrasive paste applied to borotartar can accelerate and increase the grinding amount without annealing.
Then, AFTER the rough grinding paste on the knife is cleaned, W0.5 grinding paste is applied to the ruby or natural jade for polishing, and the effect thrown out is a mirror.
Green silicon carbide, white corundum, brown corundum of these three kinds of whetstone hardness is not enough, coupled with a little coarse particle size, easy to grind out the cross, and the other three kinds of whetstone in polishing, grinding will not annealing.
If the particle size is greater than 1000, there is no difference. It mainly depends on the grinding paste used. When the grinding paste of W1.5 is applied to the ruby with 1000 mesh, its grinding effect is the effect of the grinding paste of W1.5, that is, the effect of the whetstone with 2500 particle size
Grinding Stone,Diamond Grinding Pellets,Carborundum Oil Stone,Oilstone Sharpening Stone
Henan Kemei Abrasives Co.,LTD , https://www.kmgrindingwheels.com