Roller needle roller bearings feature a thin stamped outer ring

Roller needle roller bearings have the characteristics of a thin stamped and formed outer ring. The characteristics of roller needle roller bearings: 1. The cross-sectional height is very low and the load capacity is high. 2. Mainly used for bearing configuration with compact structure and low price, and the inner hole of the bearing box cannot be used as the raceway of the needle roller cage assembly. 3. It adopts interference static fit and does not require axial fixing device. Even under high speed and heavy load conditions, it can ensure its flexible working performance. 4. Drawn cup needle roller bearings generally do not have an inner ring. Where the journal cannot be hardened and ground, a special inner ring can be used. 5. The hardened steel plate outer ring of the drawn cup needle roller bearing cannot be separated from the needle roller cage assembly. 6. Bearings generally adopt a single-row design. With the exception of bearings 1522, 1622, 2030, 2538 and 3038 with wider specifications, they are equipped with two needle roller cage assemblies. 7. According to user needs, all single-row drawn cup needle roller bearings with shaft diameter greater than or equal to 7mm can be equipped with outer rings with lubricating oil holes (code suffix AS1). 8. The advanced principle of the drawn cup needle roller bearing is that the volume of grease in the body is large, and it can be unlubricated for a long time. Due to the high temperature resistance lubrication interval, it can ensure its long-term operation without worry. 9. Generally, single row drawn cup needle roller bearings do not have lubricating oil holes and double row bearings have lubricating oil holes. The processing process of steel balls for roller bearings, the processing of steel balls also varies according to the state of the raw materials. Among them, the process before filing or light balling can be divided into the following three types, and the process before heat treatment can be divided into For the following two types, the whole processing process is: Cold punching of bar or wire (some bars need to be punched and annealed after cold punching) ---- file, rough grinding, soft grinding or light ball---- Heat treatment - hard grinding - fine grinding - fine grinding or grinding - final inspection grouping - rust prevention, packaging - storage The factory currently has 120 employees, including 5 professional and technical personnel, 12 quality inspection personnel, 15 middle and senior management personnel, 25 sets of grinding equipment, 3 sets of heat treatment equipment, 50 other production equipment, and testing equipment including Luo There are a total of 100 sets of advanced equipment such as hardness tester and length measuring instrument. Relying on these personnel and equipment, the factory has achieved an annual output of 3 million sets of bearings and an annual output value of 30 million yuan. 30% of the products are sold to the domestic host supporting market, 30% are sold to other domestic markets, and 40% are exported to Europe, America, the Middle East, Southeast Asia and other regions through foreign trade companies. At present, the factory is going through self-support import and export procedures and is committed to developing more overseas market. Our products include WB and WR series of automobile water pump bearings, as well as needle roller bearings NA, RNA, NK, NKI, IR, NATR, NUTR, KR, NKIA, NKIB, NKX, NKXR and other series.

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