There are three marking methods specified for rolling bearing Rolling Bearing Marks， namely: a. Mechanical method B. electro etching method C. chemical method Chemical method is only applicable to a small number of test products; Fill in the clearance group code and accuracy grade code; And the relevant supplementary codes and marks of paired multiple bearings.
Generally, the bearing code, manufacturing year code and manufacturer code Rolling Bearing Marks (or trademark) shall be marked on the end face of the ferrule. The three shall be evenly distributed at an interval of 120 °, which can also be called distribution for beauty. However, it can also be marked on the end face of shield, cage, retaining ring, seal or dust-proof device according to the requirements of product drawings.
If the effective width of ferrule end face is less than 0.8mm, its mark is allowed to be marked on the outer diameter and packaging; For those larger than 0.8mm, Rolling Bearing Marks they can be marked according to the following rules: For non separable bearings, it is allowed to mark a complete mark on the end face of a ferrule.
it is allowed to mark the process mark on the non datum plane of the ferrule. For release bearings, complete marks must be marked on the end face of each ferrule. However, it is also allowed to mark the bearing code and Rolling Bearing Marks manufacturer code (or trademark) on the end face of one ring at an interval of 180 °.
the code of these bearings can be marked on the end face of the ring, or the mark can be added by chemical method.[example] when bearings 627 and 618 use the same outer ring, mark “627-618” on the end face of the outer ring Rolling Bearing Marks. [example] when bearings nu2c4, nj204 and rnu204 use the same outer ring, they can be marked with “nu-nj-rnu204” on the end face of the outer ring, and the common part “204” can be marked by mechanical method.
The font shall comply with the provisions of the product design department of the manufacturer. The word height is selected according to the following height: 0.5, 0.7, 1, 1.2, 1.5, 2, 2.5, 3, 4 and 5mm. If necessary, Rolling Bearing Marks according to the provisions of the product drawings, different sizes of fonts can be used for each part of the same bearing, and the height shall be two adjacent specifications as far as possible.
Signs must be complete and complete. The handwriting must be correct and clear; The lines shall be uniform in thickness. The handwriting should have a certain depth. Electro etching method; The word height is less than or equal to 1mm, and the word depth shall not be less than 0.003mm; The word height Rolling Bearing Marks is greater than LMM but less than or equal to 2.5mm, and the word depth shall not be less than 0.005mm;
and the word depth shall not be less than 0.01mm. The diameter, bisection and font of the center circle of the sign shall not have visual offset. The logo font, symbol shape, word width, line width and distance Rolling Bearing Marks between words shall comply with the provisions of the product design department of the manufacturer.
except those allowed by the drawings and relevant documents. If the subscriber has special requirements, it can negotiate with the manufacturer and adopt the required marking methods and marking contents according to the Rolling Bearing Marks negotiated supplementary technical requirements.