Roller Bearings

Needle roller bearing by KZ | Kg Bearing India

The needle roller bearing is a special type of roller bearing that uses long, thin cylindrical rollers resembling needles. Needle roller bearings offer great rigidity and hence have the ability to handle a larger, more rigid shaft in a given application.

These bearings have higher load carrying capacity than single-row ball or roller bearings of comparable OD. Sometimes, to conserve space, the inner ring may be omitted and the needle rollers ride directly on the shaft.

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

What's special about it?

The rolling elements used are shaped like needles. These needles, with round or flat tips. The Needle bearings have rollers that are at least four times longer than their diameter.

The bearing supports very large loads thanks to the contact level developed by the needles which are mounted in a steel or molded polyamide cage.

Completed complement bearings have solid internal and external rings and rib-guided cylindrical rollers. Since these bearings have the largest possible number of rolling elements, they have extremely modern radial load carrying capacity and are suitable for especially compact design.

The Needle roller bearings are available in a single row, double row, and solid or split (divided) cage units.

Where to use Needle roller bearing

The power of having options means that you can choose what you need. So what should you think about using needle roller bearings for? Common applications include:

• Automotive

• Pumps & compressors

• Machine Tool

• Oil & Gas industry

• Home Appliances

• Power Tools

• Primary Metals

• Printing Machines

KZ BEARING SERIES:- NK  NKI  NKIS  NKS  RNA  NA69  NA49  HK  K

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Tapered Roller Bearings Inch Series

Tapered roller inch bearings are rolling element bearings that can support axial loads as well as radial loads. The load capacity can be increased or decreased depending on the contact angle is increased or decreased.

Tapper roller bearing inch series are characterized by longer rating life and operating life, due to higher basic dynamic load ratings compared to the previous standard.

They are well organized at supporting forces and ensure an exact and rigid shaft guidance system due to the large effective distance between the bearings. They are adjustable and are therefore easy to fit.

This higher performance results from the use of state-of-the-art manufacturing techniques and developed internal constructions. They lead to preferable and more uniform surfaces and contact areas and thus optimized load distribution in the bearing.

However, increasing productivity in the industry means that there is also an increasing demand for tapered roller inch bearings. They should last a long time, generate as little friction as possible, and certainly be easy to maintain.

d - Inner diameter

D - Outer diameter

B - Inner Ring   

C - Outer Ring               

T - Total width

Components of Tapered Roller Bearing

Tapered roller bearing consists of two basic components: the cup and the cone. The cup is the external ring and is a different component. The cone is made of the internal ring, roller, and cage.

These are totally different from metric taper roller bearing; the inner ring with roller and cages assembly and the outer ring have separate designations.

Materials

Chrome Steel SAE52100/100Cr6/GCr15

Chrome Steel is the most generally used material for bearings. It has a little low noise characteristic than stainless steel. In addition, its hardness means it has high load capacity than stainless steel bearings. This means that the life rates for chrome steel bearings are high than for stainless steel bearings making them a preferable choice for most applications.

KZ BEARING SERIES: LL, L, LM, MH, H, HH, E

Applications and Industry: CEMENT INDUSTRYCRUSHER INDUSTRYHEAVY MACHINERY EQUIPMENTSMINING SECTORMETAL INDUSTRYFLUID MACHINERYTEXTILE INDUSTRY, GEARBOXES, PULP AND PAPER PROCESSING EQUIPMENT, MARINE PROPULSION AND OFFSHORE DRILLING, CRANES AND SWING BRIDGES, WATER TURBINES, EXTRUDERS FOR INJECTION MOLDING.

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The Spherical Roller Thrust Bearing

KZ spherical roller thrust bearing is a rolling-element bearing of the thrust type that allows rotation with less friction and permits angular misalignment. The bearing is designed to take the radial load and heavy axial load in one direction. Spherical roller thrust bearings have specially designed raceways and asymmetrical rollers.

CAGE DESIGNS: Machined Brass Cage (M), Pressed Steel Cage (E), EJ

Bearings can accommodate axial loads acting in one direction as well as radial loads acting in one direction. The load is transmitted through the rollers at an angle to the bearing axis between the raceways, while the flange guides the rollers.

Construction
Spherical roller thrust bearings comprise of a shaft washer (for radial bearings regularly called "inner ring"), a lodging washer (for radial bearings frequently called "outer ring"), asymmetrical rollers, and a cage. There are also bearing units available that can take axial loads in two directions.

Dimensions - 29413 E

d    Bore diameter

D    Outside diameter

H    Nominal Height

d1   Outside diameter of shaft washer end side face

D1  Shoulder diameter outer ring

B   Width shaft washer or length of shaft washer bore diameter that fits on the shaft  (bearings with a stamped steel cage)                      

B1  Height shaft washer + cage

C   Height housing washer

s    Distance from shaft washer end side face to pressure point

r1,2   Chamfer dimension shaft washer

Materials
Bearing rings and rolling elements can be made of various materials, yet the most well-known is "chrome steel", a material with around 1.5% chrome content. Such "chrome steel" has been normalized by various specialists, and there are in this manner various comparable materials.

For example, AISI 52100 (USA), 100CR6 (Germany), SUJ2 (Japan), and GCR15 (China).

KZ SERIES29200,29300,29400

Some normal materials for bearing confines:
• Sheet steel (stamped or laser-cut)
• Brass (stamped or machined)
• Steel (machined)

The decision of material is basically done by the assembling volume and technique. For very large volume bearings, confines are regularly of stamped sheet metal, while low volume series frequently have enclosures of machined metal or machined steel.

Applications and Industry: CEMENT INDUSTRYCRUSHER INDUSTRYHEAVY MACHINERY EQUIPMENTSMINING SECTORMETAL INDUSTRYFLUID MACHINERYTEXTILE INDUSTRY

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Taper Roller bearings are used in heavy machinery applications.

Automotive Industry particularly use Taper Roller bearings for their heavy machinery applications.

Here are some specifications of this type of bearing.

These types of roller bearings are designed to offer balanced performance for large axial loads as well as large radial loads.

FEATURES OF TAPERED ROLLER BEARING:

The tapered roller bearing consists of an inner ring, an outer ring, tapered rollers and a window cage which serves to hold the rollers in place. Generally, the inner ring, the tapered rollers and the cage that form the cone are all in one piece that can be mounted separately from the outer ring.

The tapered angle allows the tapered roller bearing to support large axial and radial loads in one direction. It is generally necessary to provide axial guidance in the other direction by opposing a second bearing. It is also the angle and the axis of the bearing which determine the ratio between the axial capacity and the radial capacity.

The tapered roller bearing must be serviced. It must therefore be regularly lubricated with grease or oil. It can be used in a variety of environments with temperatures ranging from -30 ° C to +120 ° C. Breakage may occur if the tapered roller bearing moves in extreme temperatures.

ITS MAIN APPLICATIONS

It is used in many industrial applications. It is ideal for guides that have to undergo extreme loads. It is also found in applications where radial loads are important and rotational speeds are high.

Tapered roller bearings are essential in sectors such as agriculture, construction, mining, engines and propellers. At the industry, paper mills, cement plants and oil companies are few examples where tapered roller bearings are found.

TYPES OF TAPERED ROLLER BEARING

Though they are very relevant, there are several models of tapered roller bearing, each with certain characteristics. The single row tapered roller bearing is the simplest and most frequently consumed model. Generally mounted in pairs, it consists of a cone and a cup. There is a variant of this model where the cup is provided with a collar to facilitate axial positioning.

KZ TAPER ROLLER BEARINGS are rolling element bearings designed in a way that can support axial as well as radial loads.

*KZ BEARINGS INCH SERIES: LL, L, LM, MH, H, HH, E

*KZ BEARINGS METRIC SERIES: 30200, 30300, 31300, 32000, 32200, 32300, 33000, 33100, 33200

*Material: Chrome Steel SAE52100/100Cr6/GCr15 and Stainless Steel

Quality: ABEC1, ABEC3

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