What is an open bearing 5 and what is an open bearing

Open is a bearing industry term that refers to bearings without a shield. Usually refers to the absence of a sealing cap and no sealing ring.

Zero class bearings.

Such as 6208 and so on.

Those with double-sided dust covers, whether rubber seals or iron covers, are called closed.

Deep groove ball bearings are the most common type of rolling bearings. The basic type of deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of retaining frames. There are two types of deep groove ball bearings: single row and double row, the single row deep groove ball bearing type code is 6, and the double row deep groove ball bearing code is 4.

Its structure is simple, easy to use, is the most common production, the most widely used type of bearing.

Working principle: deep groove ball bearings mainly bear radial loads, but can also bear radial loads and axial loads at the same time. When it is only subjected to radial loads, the contact angle is zero.

When the deep groove ball bearing has a large radial clearance, it has the performance of angular contact bearing, can bear a large axial load, the friction coefficient of the deep groove ball bearing is very small, and the limit speed is also very high.

Bearing structure: deep groove ball bearings have a simple structure, and are easy to achieve high manufacturing accuracy compared with other types, so they are convenient for mass production in series, and the manufacturing cost is also low, and they are extremely commonly used. In addition to the basic type, deep groove ball bearings also have various variant structures, such as:

Deep groove ball bearings with shields, deep groove ball bearings with rubber seals, deep groove ball bearings with stop grooves, deep groove ball bearings with large load capacity with ball notch, double row deep groove ball bearings.

The differences are as follows: 1. The general bearings are divided into two kinds of dustproof and unsealed structures.

2. Non-sealed: that is, this bearing does not have any seals, which is "open".

3. Sealing: It is divided into two kinds of seals, one is the metal dust cover seal, the other is the rubber seal ring seal, of course, the two seals here are only the most conventional two kinds of seals, and there are other special seals. This seal is what you call a cap seal.

4. As mentioned above, the cap seal is divided into two material seals: metal and rubber, (that is, the material of the sealing cap). So when you talk to others, you can't say cap bearings in general, but bearings with metal shields (ZZ) or rubber seals (2RS).

5. Summary of split letter lease:

Open bearings: Take deep groove ball bearings as an example: there are no dust caps on both sides of the bearing.

Cap bearing: Same as above, the bearing is equipped with metal dust caps or rubber sealing rings on both sides (note: divided into single-sided Z, RS and double-sided ZZ and 2RS).

There is a spec sheet.

The simplest difference is that the open type does not have a dust cap.

The closed type has a dust cap and the steel ball is not visible.

The choice of with and without a lid depends on its working environment, a cleaner place, which one is almost the same! But there is so much dust like a mine, it's better to choose one with a lid! Some of the other parameters are pretty much the same!

Hehe, one has a dust cover and one doesn't.