How to prevent precision imported bearings from rusting

Corrosion occurs, which not only affects the accuracy and surface roughness, but also reduces the service life, even scrapped and cannot be used.

Bearing anti-rust work is an important task, especially the rust prevention between processes, like the bearing in the heat treatment workshop after pickling, cleaning, grinding, there are many processes. When the product is not produced by running water, it is stored in the intermediate tank once it is processed sequentially, so the bearing rings stored between the processes must be rust-proof.

The conventional anti-rust oil anti-rust method similar to rust-proof paint and the methods for preventing rust between the bearing processes are generally the following:

1. Dip in the rustproof tank
The bearing ring is immersed in an aqueous solution of 5% sodium nitrite and 0.6% sodium carbonate. The anti-rust effect is good, but many rust-proof tanks and other equipment occupy a large amount of space, and management is not convenient.

2. Dip coating of concentrated sodium nitrite solution
After washing the product, it is immersed in a solution containing 15%-20% sodium nitrite and 0.6% sodium carbonate, and then stacked. In this way, the rust-preventing period is short, generally only 7-14 days, and in the rainy season, due to the wet weather, it can only be re-treated after 2-3 days, which requires labor and money.

3. Oiling
Apply anti-rust oil like anti-rust paint like finished product. This method must be cleaned before the next step is performed, which is troublesome.

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Some common terms for rolling bearings

Some common terms and definitions of rolling bearings, mainly rolling bearing generals, radial bearings, thrust bearings, ball bearings, roller bearings, etc.:
(1) General theory of rolling bearings:
1. Rolling bearing: A bearing that performs rolling motion between a load bearing and a moving part relative to each other, which includes a raceway part and a rolling body set with or without isolation or guides, which can be used to bear radial, axial or radial Combined load with the axial direction;
2. Single row bearing: a rolling bearing with a row of rolling elements;
3. Double row bearing: a rolling bearing with two rows of rolling elements;
4. Multi-row bearing: Rolling bearing with more than two rows, bearing rolling bearing in the same direction, it is best to indicate the number of columns and bearing type, for example: "four-row radial cylindrical roller bearing";
5. Full complement rolling element bearing: bearing without cage, the total gap between the circumferential direction of each row of rolling elements is smaller than the diameter of the rolling element and as small as possible, so that the bearing has good performance;
6. Angular contact bearing: a rolling bearing with a nominal contact angle greater than 0° and less than 90°;
7. Self-aligning bearing: a raceway is a spherical shape, which can adapt to the angular deviation and angular movement between the two raceway shaft lines;
8. Separable bearing: a rolling bearing with separable components;
9. Non-separable bearing: After the final assembly, the bearing ring can not be freely separated rolling bearing;
Note: For bearings with different parts to separate parts, for example, ball bearings with double half rings (02, 01, 08) do not specify abbreviated terminology;
10. Inch bearings: Rolling bearings in the original design when the dimensions and tolerances are expressed in English units;
11. Open bearing: rolling bearing without dust cover and sealing ring;
12. Sealing ring bearing: a rolling bearing with a sealing ring on one or both sides;
13. Dust cover bearing:
Rolling bearing with dust cover on one or both sides.
14. Closed bearing: a rolling bearing with one or two sealing rings, one or two dust caps and a sealing ring and a dust cover;

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