This summer: unlimited business opportunities in the rolling bearing market

With the rapid take-off of the domestic casting industry, how to seize the market and find business opportunities became the only topic of the casting industry in China this summer. When many casting products are put to the market, needle roller bearing casting products are quietly standing in the summer due to their strong application and large market demand; but at the same time, with the progress of science and technology, all walks of life The development of bearing castings has become increasingly demanding in terms of accuracy, performance, longevity, and reliability, and new requirements have been constantly raised.

This summer, buyers are most concerned about which type of bearing casting products. According to relevant data, at present, domestically produced bearing castings cannot meet the needs of industry customers in certain aspects, while imported bearings are relatively suitable for users with higher requirements or The industry, therefore, as of mid-June, buyers have the strongest search for imported needle roller bearings and have been the searched "champions" for two consecutive months.

Needle roller bearings are roller bearings with cylindrical rollers, which are both thin and long relative to their diameter. This kind of roller is called a needle roller. Despite having a smaller cross-section, bearings still have a high load-bearing capacity and are therefore particularly suitable for applications where radial space is limited. The needle roller profile shrinks slightly at the proximal face. The result of the contact correction between the needle roller and the raceway can avoid damaging edge stress. In addition to the catalogue listed, bearings that can be used for general engineering, such as: open drawn needle roller bearings (1), closed drawn needle roller bearings (2), inner ring needle bearings (3) and not In addition to the inner ring needle roller bearings (4), SKF can also supply various types of needle roller bearings, including:

1. Needle roller cage assembly 2. Needle roller bearing without flange 3. Self-aligning needle roller bearing 4. Combined needle roller/ball bearing 5. Combined needle roller/thrust ball bearing 6. Combination needle roller/cylindrical roller thrust Bearings Drawn cup needle roller bearings Drawn cup needle roller bearings are needle rollers with a thin stamped outer ring. Its main features are low cross-section height and high load capacity. It is mainly used for the bearing configuration of compact structure, low price, and the bearing box inner hole cannot be used as the needle roller cage assembly raceway. Bearings and bearing boxes must be installed with interference fit. If axial positioning functions such as box shoulder and stop ring can be omitted, the bore in the bearing box can be made extremely simple and economical. The stamped outer ring needle bearing mounted on the shaft end has both open side (1) and one side closed (2). The base end face of the closed stamped outer ring can withstand a small axial guiding force.

Drawn cup needle roller bearings generally do not have an inner ring. Where the journal cannot be hardened and ground, the inner rings listed in the table can be used. The outer ring of the hardened steel plate of the drawn cup needle roller bearing cannot be separated from the needle roller cage assembly. The free space for lubricant storage can extend the relubrication interval. Bearings are generally designed in a single row. However, with the exception of the wider range of bearings 1522, 1622, 2030, 2538 and 3038, they are fitted with two needle roller cage assemblies. The outer ring of the bearing has lubrication holes. According to the needs of users, all single-row drawn cup needle roller bearings with a shaft diameter greater than or equal to 7mm can be equipped with an outer ring with a lubrication hole (code designation suffix AS1).

With the oil seal stamped outer ring needle roller bearings in the space due to restrictions can not be installed on the occasion, can provide open or closed end with oil seal stamping cup needle roller bearings. This type of bearing is equipped with a friction type oil seal of polyurethane or synthetic rubber, which is filled with a lithium-based grease with good rust resistance and is suitable for operating temperatures from -20 to 100°C. The inner ring with the oil seal bearing is 1mm wider than the outer ring, which ensures that the bearing works well and the bearings are not contaminated when the bearing shaft has a slight displacement with respect to the bearing housing. The inner ring of the bearing also has a lubrication hole, which can be relubricated by the outer ring or the inner ring according to the needs of the bearing arrangement.