Large-sized rolling bearing Raymond mill has been in use in overseas countries since the 1980s, and in the early nineteen nineties, this sort of Raymond mill was initial in use within the cement sector inside our state. In 2000, the rolling bearing was chosen by metallurgy and mining industry. In China, our enterprise would be the first to adopt the rolling bearing in Φ3200×3600 Raymond mill and its operation continues to be excellent because July 2005. In 2006, Zenith Machinery successfully changed the two movable bearings with the Φ5500×1800 wet-type autogenous grinding mill into rolling bearing.

At present, the hundreds of thousands of Raymond mill inside our country adopt rolling bearing and every Raymond mill is able to save electricity worth billion yuan every year without influencing the ore grinding efficiency.

In recent years, there are more and more research on the enhancement on the Raymond mill at home and abroad and the analysis from the main technical factors of the improved bearing technology is as follows:

1. Factors with the spherical roller bearing:

The spherical roller bearing has many features such as high load ability, suitable for heavy load and vibration load, good adjustable spherical ability and low limit rotary rate. The Raymond mill will produce huge deflection under heavy workload.

2. Sealing of your bearing:

The bad working environment in the Raymond mill has high requirements for the sealing with the bearing. If the sealing from the bearing is not tight and international matters and dust go in, the particle of the bearing rolling pipe will be abraded and the bearing will become warm, as a result, the stickiness from the lubricating grease will decrease and the lubricating effect will be reduced. If water and harmful gas go into the bearing, the spare parts of the bearing may be eroded and the service life with the bearing will be decrease. For the above-mentioned reasons, the sealing of the bearing has great importance.