Introduction:

Basic concept of needle rolling

Needle roller bearings are equipped with thin and long rollers (roller length is 3-10 times the diameter, and the diameter is generally not greater than 5mm), so the radial structure is compact. Its inner diameter size and load capacity are the same as other types of bearings, and its outer diameter is the smallest, making it particularly suitable for support results with limited radial installation dimensions. According to different usage scenarios, bearings without inner rings or needle rollers and cage components can be selected. At this time, the journal surface and outer shell hole surface that match the bearing are directly used as the inner and outer rolling surfaces of the bearing. To ensure the same load capacity and operating performance as bearings with ring rings, the hardness, processing accuracy, and surface quality of the shaft or outer shell hole raceway surface should be similar to those of the bearing ring raceway. This type of bearing can only withstand radial loads.

Model comparison

1. Centripetal needle roller and retainer assembly (K-type);
2. Needle roller bearings with double locking rings on the outer ring (NA type, NKI type, RNA type, NK type);
3. Single row needle roller bearings with dual gear edges on the outer ring (NA type, NKI type, RNA type, NK type);
4. Double row needle roller bearings with dual gear edges on the outer ring (NA type, RNA type);
5. Stamped outer ring needle roller bearings (HK type, BK type).
This type of bearing has low cost, high load-bearing capacity, and is suitable for supporting structures with limited installation dimensions. The journal surface is hardened as a rolling surface, and the bearing is inserted into the seat hole by pressing fit without the need for axial positioning. Before installation, the bearing should be injected with an appropriate amount of lubricating grease. Generally, BK type bearings do not need to be lubricated again after assembly. They are used for supporting shafts without protruding ends, and the end face is sealed to provide a sealing effect, and can withstand small axial displacement forces.

Advantage:

1. High speed, high precision

2. Long service life

3. Low noise and good performance

Shaanxi Fortune Industries Co.,ltd located in Xi’an of the oldest city in China. We have experience for over 15 years, As a professional exporter in Ball & Roller Bearings and Auto Parts on standard and nonstandard, our success is based on:

High Quality Bearing at the Good Price
In this competitive world economy it is critical that we provide you with a bearing that meets your different requirements at an affordable price. We can offer bearings at multiple price points from hundreds of factories established stable relations with us in China.

Experienced Staff
We target specific automotive industries, learn about their particular uses and bearing needs, and supply exactly what is required. We have specialists on staff who understand these markets and can respond promptly. we would be glad to create most suitable solution for your needs.

Bearing in Variety
You will find thousands kinds of bearing on standard on our Website: www.sft-bearings.com, we trust you can choose bearing you required. If you can not identify your bearing, Just tell us the dimensions we offer bearing on non-standard.

Professional Service
Our technical team are experienced in automobile bearings, industry bearings, We are able to provide support on bearing selection, design optimization, product development, bearing mounting, bearing maintenance, lubrication and etc.

Quality control system

In 2011, We have been awarded Quality Management System Certificate No. 00111Q25911R0S / 6100 for compliance with the standard ISO9001 : 2008　＆　GB/T 19001 - 2008 apply in Export of Bearing and Auto Parts.

Bearings and More
In addition to ball and roller bearings and auto parts, we also carry Linear Motion, Roller Chain, Motorcycle Sprocket and more. Please view our website.

Today, All of our products have been exported to dozens of countries and regions all over the world, such as Europe, America, southeast Asia, middle east, Africa etc. and products are used in a broad range of applications, including automobiles, railways, steel industry, motorcycle, agriculture machine, wind turbines, papermaking machine, office equipment, machinery tools etc.

We do best spare parts and transmission parts for you!