Bearing refurbished? And the differences between the good bearing and identification methods

Bearing is the common parts in machinery and equipment, as well as the important parts, bearing is also very widely used. There are a lot of 'dirty' businessman in order to earn more money, in order to good old filling, some recycling use or not use the old bearing after processing as the new bearing to buy, renovate the bearing and bearing or there is a big difference in the use of performance and good bearing, China bearing network according to the understanding of the knowledge of bearing, today to share about the refurbished bearing with good bearing differences, and how to discern when buying bearings bearing is bearing after renovation of the old bearings. Refurbished bearing with good bearing difference: 1, after the renovation of bearing size have change, small diameter, inner diameter can be measured with your ruler. 2, watch precision bearing surface, whether smooth. A refurbished bearing rough. 3, uneven turning bearing refurbished bearing by hand. 4, watch gap renovation of cage and rolling element bearing clearance than normal clearance. 5, the bead will be refurbished bearing bead sizes wear and deformation. 6, see slide, refurbished bearing slide have irregular wear and deformation. A good way to identify a refurbished bearing: 1, refurbished bearing generally due to limited technology and equipment, the small bearings, bearing is low precision, so the bearing surface rough, uneven chamfer size, there is some black and pitting. 2, some bad bearings use of materials for ordinary steel, carbon steel, malleable iron and iron pipe, etc. , and most of these material appearance color white, special bearing steel slant green color. But light color can't completely decided to do hardness. Ordinary steel hardness is low. 3, some small manufacturers quenching technology is simple, bearing heat unevenly, there will be slight deformation. 4, turn the bearing, the bearing rotation is uniform, sound is continuous without a murmur. 5, see the cage, normal manufacturer bearing cage neat burr, riveting pier bearing cage rivet head size is consistent, and not normal manufacturer processing technology and equipment is simple, so the cage rough, uneven some riveting structure maintains a uniform and or in partial, rivet riveting or partial pier head sizes. 6, see packaging, packaging normal manufacturer is consistent, clear font on the package, some fake bearing packing, or simple informal. 7, the bearing face font, original bearing steel word or uniform laser fonts are very clear, laser font has a certain depth, counterfeit bearings have broken mark font, a laser font with gauze lightly rub, and regular laser font with gauze after a wipe traces of fuzzy font. 8, the certificate of approval, normal manufacturer bearings have certificate and certificate same size, most of the certificate of approval for greaseproof paper paper. Font is clear, some manufacturer certificate on the query information, fake certificates, font some fuzzy, paper for ordinary paper, certificate sizes. Comparing with normal manufacturer certification. 9, some imported bearing in anti-rust oil and there's a difference, domestic imports bearing is not no rust inhibitor but can't see the trace bearing surface clear, and some of the counterfeit import bearing with local corrosion inhibitor in hand feeling sticky, will taste a rust-proof oil flavor. 10, understand and know some normal manufacturer normal products in bearing type specification, such as: bearing type, brand, year. And some false bearing font is carved up, even if the laser played some font fuzzy. 11, if there are conditions to best bearing manufacturer or brand dealers in person.