CHG Bearing-High quality Large bearing rollers production line

The company has an advanced, fully automatic and intelligent production line of heat treatment, also several turning & grinding production lines, automatic inspection and packaging lines including flaw detection, sorting, typing, oiling and packaging, which enables online quality control of the entire process and ensures stable quality of the products.

CHG bearing roller production line can produce all kinds of high-precision cylindrical and tapered rollers in the range of φ15mm to φ 160mm in diameter and 20mm to 220mm in length, with an annual output of over 3 million pieces and product precision up to G1 and G1A(Grade I) standards. More than 150 sets of various precision equipment, and various perfect special testing instruments, ultrasonic flaw detection (UT), magnetic particle flaw detection (MT), eddy current flaw detection (ET) instruments, spectrometer, carbon and sulfur analyzer, roundness meter, contour roughness meter, etc. The heat treatment line can independently guarantee product quality, fully realize quality control adopted in the whole process from raw materials to finished products, the production process of turning, heating and grinding in an orderly manner and the flaw detection, sorting, oiling and packaging completed in one stop.

CHG has brought in heat treatment line of the world-class Aichelin technology, pusher furnace carburizing quenching and roller hearth furnace secondary quenching, and can visually display its entire production, monitor and record automatically its processing parameters and quality data. Pre-oxidation before carburizing, can make the carburized layer of products more even. The main quality indexes need to meet: to be 1 ~ 8mm in the depth of carburizing layer in need; ±0.05% of the carbon potential deviation in the carburizing furnace, 0.1mm of the same roller carbon penetration deviation; carburizing furnace, thermal insulating furnace, high&low temperature tempering furnace,±1℃ temperature control accuracy of roller rod heating furnace, ≤±5° C uniformity of furnace temperature. The nitrogen protection is adopted in high temperature tempering, while the atmosphere protection is adopted in roller hearth furnace ,which makes sure that the carburized steel roller can avoid decarburization, the decarburizing layer depth of high-carbon chromium bearing steel rollers is ≤0.03 mm; Residual austenite content of the finished rollers is less than 8%.