Inspection of the bearing signs
(1) the sign of bearing party remove
The rolling bearing specified marks the following 3 kinds of methods, namely:
A. mechanical method b. electrical erosion method c. Chemical method
Chemical method is only a small amount of test products; BuXie clearance group code and precision grade code; Pairs split bearing and relevant added code and mark etc.
(2) the mark of the content and position
Should be in commonly ring width marking bearing code, manufacturing year code and factory code (or trademark), three 120 ° interval even distribution for beautiful can also are called distribution. But also in accordance with the requirements in product drawings standard shield, maintains a, block circle, seal or dust on the surface of the device. Manufacturing years points should comply with the factory product design code regulations of the department.
Ring width of less than 0.8 mm width effectively, the logo in the outer diameters and allow standard packaging; For more than 0.8 mm, according to mark the following rules:
1) for cannot be separated type bearings, allow in a ring width, marked with complete sign. For the difference between the point to another collar, allowing the collar of the in the datum superscript process sign.
2) on the separating type bearings, must be in each ring width marking the complete sign. But also allows in one of the rings of end on 180 ° interval on mark bearing code and factory code (or trademark).
3) several types of bearing collar using the same, can be in the ring width marking the bearing of the code, or add sign with chemical method.
[example] bearing 627 and 618 using the same outer ring, the outer ring end marking "627-618".
[example] bearing NU 2 C4, NJ 204 and RNU 204 using the same outer ring, may in the outer surface, marked "NU-NJ-RNU 204", in which the common parts "204" usable machinery method sign.
(3) mark font and word high
The font should comply with the factory product design regulations of the department. Word to the following selected high height: 0.5, 0.7, 1, 1.2, 1.5, 2.5, 2, 3, 4, 5 mm.
When necessary, can according to the provisions of the product drawings, the same bearing the parts can use different sizes of font, its height should choose as far as possible each other next two specifications.
(4) mark requirements
1) logo must be complete, complete.
2) the writing must be correctly and clearly; Line should be even thickness. The handwriting is due and certain depth. Electrical erosion of law; Word high less than or equal to 1 mm, the word shall be no less than 0.003 mm deep; Words in LMM tall but less than or equal to 2.5 mm, the word shall be no less than 0.005 mm deep; Word in 2.5 mm tall, its word shall be no less than 0.01 mm deep.
3) mark center circle diameter, parts and font, etc may not have visual visible migration.
4) mark font, symbol shape, word wide, line width and the distance between the word should comply with the factory product design regulations of the department.
5) bearing parts surface XuTu paper and the relevant documents are allowed to sign outside, must not have other signs.
6) subscriber have special request, but with factory consultation, according to the technical requirements for the added consultation for mark method and mark content.




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