Tapered roller bearings consist of four basic components including: the cone (inner ring), the cup (outer ring), tapered rollers, and a cage (roller retainer). The cone, cup and rollers carry the load while the cage spaces and retains the rollers on the cone. The cone, rollers and cage components of our tapered roller bearings are referred to as the cone assembly. Individual cup and cone components of our tapered roller bearings are available as well as the complete assembly. In addition, SAIFAN offers a variety of configurations to our tapered roller bearings such as single-row, double-row and four-row.

1. KOYO U399/U360L+R Bearing Description:

Single row radial ball bearings are the most widely used bearings and utilize an uninterrupted raceway, which makes these bearings suitable for radial loads, or a combination of thrust and radial loads. This design permits precision tolerances even at high speed operation. Shielded bearings are protected on one, or both sides (suffixes Z and ZZ, respectively) by metal shields fastened to the outer ring. This close clearance labyrinth seal retains the lubricant and prevents the entrance of foreign matter. Sealed bearings incorporate steel reinforced rubber seals securely fastened to a groove on the outer ring. Contact with the inner ring is by sealing lip (Contact Suffix LLU). Or, non-contact with the inner ring is by labyrinth seal (Non-contact Suffix LLB) to provide positive sealing at all times.

NTN is one of the three largest bearing companies in the world with more than ninety years of manufacturing expertise in ball bearings.

2. Application:

Gearbox, motor,auto,reduction box,engine machinery,mining machinery,bicycles,etc. 

3. U399-90010 Bearing Features:

1. Deep groove geometry for high speeds

2. Single row for supporting radial loads

3. Steel cage evenly spaces balls for reduced friction, vibration and noise

4. Rubber seal on the side of the bearing exposed to contaminants and open on the other for applying lubricant

5. CN (normal) radial internal clearance for applications that do not involve thermal expansion or atypical precision

4. Quality&Services:
We are manufacturing the first, the second and the third generation wheel hub bearing units, over 200 varieties. They are suitable for various famous cars e. G. for Nissan, for Audi,for  Hyundai,for  BMW,for Benz.
Products process: Advanced producing equipment, inspection equipment and good control system to keep the product produce smoothly.
Quality guaranty: Product quality assurance period is over year 2000 miles.
Superficial finish: Carefully work in the assembly line to confirm the products in perfect appearance. Products can also be manufactured according to drawings and samples with customers requirement. We sincerely welcome our friends to visit and negotiate business.
Meanwhile, we are looking forward to finding long-term partners.
We provide high quality product and excellent customer services. 

NO.1  Professional Bearing Manufacture

Jinan Saifan Bearing Co., Ltd is a professional bearing manufacture located in Jinan, Shandong. We are established in year 2005 and we have 10 years experience in bearing manufacture.

We mainly produce wheel hub bearings, ball bearings, roller bearings etc.

We have abundant technical force, advanced technical machines, and complete detection ways. We can produce P0 -P4, Z2 Z3 Z4 grade bearings. We own a dozens of technical experts who compose to a high-quality professional marketing team which supply high quality service in the pre-sales, sale and after-sales; we can also produce bearings according customers’ request.

NO.2 Strict Production Process

NO.3 Provide Standard quality and competitive price