K Series Needle Roller Bearing K12*15*8

K Series Needle Roller Bearing K12*15*8

What is needle roller bearing?                                                                                      
Needle bearings use a roller style rolling element to reduce friction of a rotating surface. Needle Bearings have a high load carrying capacity with a very small cross section height. They are available with or without an inner ring. The needle rollers are guided parallel to the axis using a cage retainer, thrust bearings can also be supplied with no retainer, which is referred to as a full complement of rollers.

Needle bearings have a larger surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less clearance, or the difference between the diameter of the shaft and the diameter of the bearing, so they are much more compact. The typical structure consists of an inner race (or sometimes merely a shaft), a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race.Needle bearings are heavily used in engine components such as rocker arm pivots, pumps, compressors, and transmissions.

A needle roller bearing is a bearing which uses small cylindrical rollers.The difference between a needle roller bearing and roller bearing is the ratio of diameter and length of their rollers, when the ratio of the diameter and the length of roller of a roller bearing is between the interval of 0.1 to 0.4, that roller bearing is called a needle roller bearing. They are used to reduce the friction of a rotating surface.

Needle bearings have a large surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less added clearance (difference between the diameter of the shaft and the diameter of the bearing) so they are much more compact. The typical structure consists of a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race (sometimes the housing itself).

Radial needle bearings are cylindrical and use rollers parallel to the axis of the shaft. Thrust needle bearings are flat and use a radial pattern of needles.

Full complement bearings have solid inner and outer rings and rib-guided cylindrical rollers. Since these bearings have the largest possible number of rolling elements, they have extremely high radial load carrying capacity and are suitable for particularly compact designs. 

What are the applications of Needle Roller Bearings?                               

Needle bearings are heavily used in automobile components such as rocker arm pivots, pumps, compressors, and transmissions. The drive shaft of a rear-wheel drive vehicle typically has at least eight needle bearings (four in each U joint) and often more if it is particularly long, or operates on steep slopes.

Additional clarification of needle roller bearing: According to "Marks' Standard Handbook for Mechanical Engineers", a needle bearing is a roller bearing with rollers whose length are at least four times their diameter.

These picuters are real, taken in our factory, if your target model is not at below,just contact me.For most needle roller Bearings, we have stock.

Trading information                                                

1.OEM Service.

2.Free Samples Available.

3.Quick Delivery,for stock bearing,we can arrange delivery within 3 days.

4.Trade Manager always online, easy to find us.

Q;Why do we choose your company?

A: Our company has been a professional bearing manfacture for 1o year.

We always insist quality first. We have our bearing factory, therefore we have

advantage in quality control and price.

Q;What is the delivery time?

A: Most of the bearing we have stock. For small quantity, we will arrange delivery

within 3 days.

Q;What is your payment term?

A: Our payment term include T/T, Western Union, Paypal etc.

Q;Can you send bearing samples first?

A: Yes, we can send bearing samples to check quality first

Q:What is your MOQ?

A: For common bearing model number, our MOQ is 1pc.

If you have any questions,welcome to contact Amy Peng