High-Quality Tapered Roller Bearing 55*120*29mm 30311

• Rolling Body：Roller Bearings
• The Number of Rows：Single
• Outer Dimension：Medium and Large(120-190mm)
• Material：Bearing Steel
• Load Direction：Thrust Bearing
• Separated：Separated

=== Base Info ===

• Model NO.：30311
• OEM：Acceptable
• Transport Package：Client′s Requirements
• Specification：55*120*29mm
• Trademark：FOCREA
• Origin：China
• HS Code：82822000
• Production Capacity：5000PCS,Day

=== Description ===
Product NameTaper Roller Bearing 30311MaterialChrome SteelSize55*120*29mmCageSteel CagePlace of OriginChina(Mainland)FeatureLow noise, low vibration, long lifeserviceOEMPackingAccording to the buyer requests for packaging 

Tapered roller bearings are bearings that can take large axial forces (i.e., they are good ) as well as being able to sustain large radial forces.
The inner and outer ring raceways are segments of cones and the rollers are also made with a taper so that the conical surfaces of the raceways and the roller axes if projected, would all meet at a common point on the main axis of the bearing.
This conical geometry is used as it gives a larger contact patch, which permits greater loads to be carried than with spherical (ball) bearings, while the geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the and no differential scrubbing occurs. When a roller slides rather than rolls, it can generate wear at the roller-to-race interface, i.e. the differences in surface speeds creates a scrubbing action. Wear will degenerate the close tolerances normally held in the bearing and can lead to other problems. Much closer to pure rolling can be achieved in a tapered roller bearing and this avoids rapid wear.
The rollers are guided by a flange on the inner ring. This stops the rollers from sliding out at high speed due to their momentum.
The larger the half angles of these cones the larger the axial force that the bearing can sustain.
Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly (containing the rollers and a cage). The non-separable inner ring and roller assembly are called the cone, and the outer ring is called the cup. Internal clearance is established during mounting by the axial position of the cone relative to the cup.
 
Taper Roller Bearing Types
 
1. single row tapered roller bearings
   
2. paired single row tapered roller bearings
  
3. double row tapered roller bearings
  
4. four-row tapered roller bearings
 
Single row inch-dimensioned tapered roller bearings

• Single-row inch taper roller bearing is major in a suit for sustaining combined load from radial and axial load but inclined to radial load.
• Single-row inch tapered roller bearings should not solely sustain axial load, it also will produce additional axial forces under the radial load.
• The axial load capacity of single row inch tapered roller bearings is determined by the contact angle, the bigger the contact angle, the heavier the axial load.

• Double row tapered roller bearings have two kinds separated by pairing structure, two independent cone-bearing paired installation
• Clearance with baffle type adjustment, the inner ring, an outer ring between the identification code,
•  We do not suggest the same size of the bearing parts interchange installation for this kind of bearing, it must use the same bearing inner parts for installation

• Four-row tapered roller bearings must be installed as a complete bearing in the chocks.
• To enable quick roll changes to be made, four-row inch tapered roller bearings must have a loose fit on the roll necks.
• Loose fits have the disadvantage, the inner rings wander on their seatings under the prevailing load conditions causing wear to the seatings which normally have a lower hardness than the rings.

Company Description

Qingdao FOCREA International Trade Co., Ltd Founded in 2017 in Qingdao, Shandong. We are a company integrating industry and trade, specialize in manufacturing and exporting machine tool accessories, collet, tapered roller bearing, steel ball and etc. Those products are mainly applied to the fields of automobiles, engineering machinery, machine tool, and agricultural machinery. Also, the products are exported to the US and other developed countries in Europe.

"Customers first and reputation first" are the permanent vision of FOCREA. We would like to serve customers around the world with our trustworthy products, reasonable prices, and attentive service. 

As we focus on exporting, we have more sufficient professional knowledge in engineering machinery and equipment. At the same time, we understand the differences in product demand and use by customers in different countries. We make customized improvements for customers with different needs according to local conditions and match the most suitable product configuration according to the market. Based on all these, it makes our FOCREA brand a top leader in the industry.

Our products not only fully fit the standards of global markets, but also are accompanied by good value for the money as many Chinese products. Our company welcomes customers from all over the world to visit us.

Our company provides a one-stop service. The goal is to let customers use the least time to find the required product with the best price.

Pre-sale service, our sales give the most suitable suggestions and recommendations according to the customer′s situation. At the same time answer various consulting questions about the product, and provide the best solution.

During the negotiation process, we use our professional attitude to guide our customers to get the best value products and answer various consulting questions of the product, providing the best solution.

After-sale service, except the warranty service, we respond quickly to any kind of using problems or support by online support or field repairs.

We understand! We care about what you think!    FOCREA is always with you!