Whether the outer packaging is clear: Under normal circumstances, the factory brand has its own special designer to design the outer packaging, and arrange the production conditions of the factory to produce, so the packaging is very clear from the line to the color block, unambiguous Some imported brands also have unique designs on their accessories that are designed to protect their intellectual property.
Whether the steel printing is clear: brand words, labels and so on will be printed on the bearing body. The font is very small, but most of the products produced by the factory use the stencil technology, and the type is pressed before the heat treatment, so the font is small, but the recess is deep and very clear. The fonts of counterfeit products are not only blurred, but because of the rough printing technology, the fonts float on the surface, and some can even be erased by hand.
Is there any noise: hold the inner sleeve of the bearing with your left hand, and turn the outer sleeve with your right hand to make it rotate to hear if it has noise. Since most of the counterfeit products are out of production conditions and completely hand-worked, it is inevitable that impurities such as sand will be incorporated into the bearing body during the production process, so that noise will be generated when rotating. This is the biggest difference between a factory brand that strictly enforces production standards and operates with machines.
Whether there is turbid oil on the surface: this should be paid special attention when purchasing imported bearings. Since the current domestic anti-rust technology is not particularly good at home, it is easy to leave a thick oil trace when the bearing body is rust-proofed, and it is sticky and sticky on the hand, and the bearings imported from abroad are almost invisible. To the traces of anti-rust oil, it is particularly careful that the imported bearings smell a smell, and it is definitely anti-rust oil, just can't see it.
Whether the chamfer is uniform: the so-called chamfer of the bearing, that is, the intersection of the horizontal surface and the vertical surface, the counterfeit bearing is unsatisfactory in the processing of these corners due to the limitation of production technology.
It can be equipped with a scrolling display that displays 300-500 words of display content. It can also be equipped with intelligent infrared probe anti-collision device, which can automatically return to work when people or foreign objects are 20-30CM, thus ensuring the safety of vehicles and pedestrians.It can automatically open and close when automatic clutch is cut off. Manually open and close when manual clutch is cut off. The control system has control panel, push button switch, and other requirements. Equipped with wireless remote control.The door body is made of high-quality stainless steel and aluminum alloy profiles, and is hinged by the parallelogram principle. The drive is driven by special motor, worm and worm gear deceleration, and has automatic clutch or manual clutch.
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Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.spiralfastdoor.com