LLG ROD END BEARING

LLG is the leading manufacturer offering a variety of Rod End bearing bearings, where you can also customize our product to fits your business needs.

We in LLG our Rod End bearings can mainly use in multiple industries like Garment Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Printing Shops, Construction works , Energy & Mining and Advertising Company, and more that requires Rod End bearing.

The Rod End bearing of LLG can be distinguished base on the highest speed and acceleration ability, intact stiffness, best accuracy, lowest friction and heat generation with minimal lubrication required, and extended operating life of our Rod End bearing.

We ensure the quality of our product in every purchase made, buying in LLG, we make sure that after-sales service will be served to all our customers, your feedback is important to us.

LLG Rod End bearing has an amiable cost, preventing electrical turn, the best for its grease life, and reducing wear from vibration, in this case, your machinery will work productive because of our Rod End bearing.

Being the leading manufacturer of Rod End bearing, we have an extensive range of skilled worker who assures the quality of our products.

State of the art and advanced testing of equipment to provide first-class and high-quality Rod End bearing. We are happy to serve you, what are your waiting for send your inquiries!

Rod End Bearing-The Ultimate FAQ Guide

In today’s world of technology, bearings are a big part of industries. Consumers from all around the globe are looking for manufacturers’ who are able to satisfy them by giving high operational, durable and good quality bearings.

In this modern era, manufacturing of such bearings is a big challenge for all. LLG bearing is at best to provide their customers with efficient working bearings and which do not worn out easily.

In this write-up, you will get detailed information about these rod end bearings. So, you are at the right place.

• What Is a Rod End Bearing?

Such type of bearing is defined as a mechanical joint which is placed at the corners of control rods. Such type of bearing is used on the borders of tie-rods, cylinders as well as rotating shaft to carry misalignment among the parts which are linked with each other. 

Tie rods are able to rotate in the direction of steering wheels and such oscillatory movement is carried in a fine manner without any damage. 

Rod end bearing have a spherical internal ring plus a cylindrical hole to mount the shaft easily. 

Rod end bearing is also referred as rose joint and heim joints.  Heim joint’s merit is that the rotating element present allows the shaft and fastener which runs through it can bear misalignment. 

Rod end bearing is connected with a rod and a shaft through a stud (male) with outside thread and housing (female) with an inner thread.

Rod end bearings have a diameter from 5mm -30mm. 

Rod End Bearings

• How Are Rod End Bearings Used?

Rod end bearings are used to link the ends of control ends, steering connects and tie rods manually. A rod end bearing make a great intersection with the centre of axis of rotation of both shafts. 

Whereas, axis of the rod end bearing lies vertical to each other. Rod end bearing is good in permitting three axis rotation among the parts. 

Rod end bearing consist of a plane bore found in the centre of spherical joint with which a single part is connected and in the casing it may either consist of a pressed hole or a threaded shaft. 

Rod end bearing is used where precision is required in terms of articulation and absence is needed for a clevis end.

Rod end bearings provides you with more accuracy in controlling and have a good zero wear when oscillating back and forth. 

• How do you Measure Rod End Bearings?

Rod end bearing is measured by keeping in mind following points. They are stated as:

• Imperial thread

Such imperial thread bearings made of rod ends are also known as UNF which has become a standard now. The way which is used to find the pitch is TPI. Thread size is found by measuring the diameter of the external boundary. Such method of measurement is used for measuring female thread.

• Metric thread

Such rod end bearings are marked by pitch of the thread despite measuring the counts. Pitch of the thread is calculated in terms of millimeters. 

Pitch of the thread is evaluated with the help of a gauge. Gauge is an ordinary tool and cost less. 

• Ball eye

The ball eye of the bearing made of rod end is evaluated across the diameter of the bore given. 

• Which Material Is Used in Construction of Rod End Bearings?

Rod end bearings are precision articulating bearings. Thus, rod end bearings are made of various materials such as:

• Stainless-steel 
• Aluminum
• High-carbon steel
• Steel or Iron
• Plastic
• Nylon as well as Teflon
• Sintered brass and copper
• Ferrous metal

• What Is Optimum Temperature Range for Rod End Bearing?

A rod end bearing can operate best at -10⁰ celcius – 80⁰ celcius. When the temperature has elevated to a greater extent above the required temperature, this has an effect on the power of rod end bearing and the bearing life of rod end bearing. 

Rod end bearings working at high temperature depends upon the lubricating grease in a view that whether it provides excessive lubricity or not so that they may work easily. 

Rod end bearings which do not require lubrication can operate at -50⁰ celcius to 150⁰celcius. 

Rod end bearings which are in sealed form can work best at temperature ranging from -20⁰C to 120⁰C.

• Does Rod End Bearing require Maintenance?

These type of bearings can be maintained as well as require lubrication. Rod end bearings with steel-steel and steel-bronze combination consist of zero wear surfaces and even can operate well when no lubrication is provided. 

Rod end bearings which have sliding top can-not resist re-lubrication because its’ a need. They can be used in applications that have the ability to bear heavy pressure or loads. 

Rod end bearings possess fluid type and boundary kind of lubrication but most often boundary lubrication is given which is stated as:

Boundary lubrication

In such type of method of lubrication or maintenance, metal contact cannot be avoided. The friction produced due to metal contact is greater. Due to rash conditions and high temperature, the film of the grease is removed from the surfaces of the rod end bearings. All such circumstances result in seizing of these special bearings made of rod ends. 

To prevent from such failures of seizure or wear, re-lubrication is required and this can be done in the form of oil groove. Oscillatory movement is more abrasive for rod end bearings than that of rotational movement. 

Dry-film lubrication

This lubricant or method of lubrication aids in preventing wear and corrosion. Dry-film lubricant is a solid film. It is made of materials such as molybdenum, high carbon steel (graphite) which is further a mixture of inorganic and organic substances. 

This method of lubrication is best when operating temperature for the lubricant or grease is elevated. When an excessive pressure is applied and it is not even among the parts of the rod end bearings, dry-film also faces damage. 

• Describe Maintenance-free Rod End Bearings?

Rod end bearings which are maintenance-free consist of a shaft along with the housing. 

Shaft along with the housing have an inner and outer threads. Maintenance-free rod end bearings have the capacity to support tensile radial load in various directions. They can also bear rotations with the help of swivel angles that must be moderate. 

Maintenance-free rod end bearings are used for loads that are applied in a single direction. They are also resistant to corrosion due to plating of zinc material. 

Maintenance-free rod end bearings present in a sealed form are resistant to corrosion and foreign substances due to lip covers. 

Maintenance-free Rod End Bearing

• What do you know about Steel Rod End Bearings and Plastic Rod End Bearings?

Steel and plastic rod end bearings are distinguished from each other on the reason of their structure and performance. 

Steel rod end bearing consist of three pieces such as a housing, a ball bearing and a pivot whereas, plastic rod end bearing consist of two pieces such as a housing as well as a rotating ball. 

Steel rod end bearings assist to rotate the shaft as well as the ball opposite to the housing and place the ball opposite to the housing to make an angle with the shaft. Steel rod end bearings are re-lubricated at regular intervals.

Steel rod end bearings have greater static load capacity. Steel rod end bearings can extract heat produced easily. 

Steel Rod End Bearing

In Plastic rod end bearings, shaft moves opposite to the ball instead of the housing. Plastic rod end bearings require no maintenance. Plastic rod end bearings weight is less than that of steel rod end bearings. 

Plastic rod end bearings have the capacity to suck more noise vibration than that of steel rod end bearings. Plastic rod end bearings have low static capacity. 

Plastic rod end bearings have low torque than that of steel rod end bearings.

Plastic rod end bearings produces huge amount of heat when exposed to another plastic. 

• What Are the Merits of Plastic Rod End Bearings?

Apart from the various rod end bearings, plastic rod end bearings are also in demand and have various advantages which are as follow:

• Plastic rod end bearings have ability of self-lubrication
• Plastic rod end bearings are much lighter in weight.
• Plastic rod end bearings are resistant to foreign particles and dirt 
• Plastic rod end bearings are used in various movements like rotating, oscillating as well as linear movement. 
• Plastic rod end bearings diminishes the vibration produced

Plastic Rod End Bearings

• What Are Demerits of Plastic Rod End Bearings?

Plastic rod end bearings are useful in many ways but they also have some demerits stated as:

• Plastic rod end bearings have less ability to bear static load
• Plastic rod end bearings generate excess heat
• Plastic rood end bearings’ tightening torque ability is less
• Plastic rod end bearings cannot place the rotating balls with screws

• What Are the Merits and Demerits of Steel Rod End Bearings?

Apart from the rod end bearings made of plastic, steel rod end bearings are also in competition with them. The merits and demerits are given below:

Merits

• Steel rod end bearings can bear greater static load
• Steel rod end bearing has high torque coefficient
• Steel rod end bearing have less tolerance
• Steel rod end bearings can easily extract heat from them

Demerits

• Steel rod end bearings are heavier 
• Steel rod end bearings are more exposed to corrosion
• Steel rod end bearings need maintenance
• Steel rod end bearings do not produces less vibration 

• What do you know about Load Rating of Rod End Bearings?

Load rating of these rod end bearings is found by the load applied on each part of the rod end bearings. 

The limiting factors of rod end bearings are given as:

• Shank area is stressed and play role as a male and female rod end bearings
• Shear capacity is doubled when passing through the ball hole
• The stress is applied between the area of transition such as threaded shank as well as the rod end bearing eye.

The static load for the rod ends bearings is equivalent to the bearing load as is shown as:

Po=Fr+Y.Fa

It is the constant strength load in a great stressed condition. In rod end bearings, static load rating is always less than that of basic active load rating. 

• Explain Types of Rod End Bearings?

Rod end bearings consist of two-piece as well as three-piece form.

 A former rod end bearing is such a bearing which consist of a ball in spherical form fixed or inserted into the housing.

 A three-piece rod end bearing consist of a ball in spherical form which is inserted into the raceways and the race is in turn fixed into the housing. Some three-piece rod end bearings add a feature of PTFE in them which is used for lubrication. 

Two-piece rod end bearing is formed when race balls comes in contact with the rod end body. This type of bearing can carry both loads such as radial and thrust loads. 

Two-piece rod end bearing provide greater strength. 

Three-piece rod end bearings have flexibility and are coated with chrome, zinc and cadmium plating. 

• What Are Male Rod End Bearings?

The rod end bearings are grouped as male or female due to design of the thread. Male threads or rod end bearings are formed as external linking threads.  

Male rod end bearing has an opening for the attachment. It also consists of a threaded shaft.

Male rod end bearing also possess a casing and a ball swivel. 

Male rod end bearings have grease maintenance in the head.

Male Rod End Bearings

• What Are Female Rod End Bearings?

Female rod end bearings are made in such a form that they offer inner threads. They are used to carry those loads which male rod end bearings cannot handle. 

Female rod end bearings permits the changes on key components. When dealing with the pitch, female threaded rod end bearings must be used and are threaded instead of fixing. 

Female rod end bearing is best for light weight applications. These bearings are used in helicopter and in motorcycles. Shifter of the motorcycle permits the loads or force to be applied in a linear way. 

Female rod end bearings have grease maintenance in the shaft.

Helicopters use female heim joint or rod end bearings to balance the blade direction. 

 Female Rod End Bearing

• What Are the Specifications of Rod End Bearings?

Rod end bearings have the capacity to bear greater load as well as maximum misalignment.

The angular misalignment which occurs is half of the other side value and thus the movement of rod end bearing is uniform.

It can bear low to optimum angular misalignment of the rotating shaft along with the housing. 

Rod end bearings are linked with the shaft and end rods through male and female inner threads. Right-handed thread is the usual and common thread which is fixed in a clock-wise direction. 

Some kinds of rod end bearings require lubrication and some do not. Some are sealed with the material Teflon and some are resistant to corrosion. 

Rod end bearings must have diameter of shaft either equal or greater than the hole. 

• What Are the Applications of Rod End Bearings?

Rod end bearings finds its’ vast use from household machines to heavy duty industrial machines or equipments. Its’ applications are as follow:

• Agricultural equipments
• Medical machinery 
• Exercise machinery
• Aerospace
• Military equipments
• Steering knuckles
• Construction tools
• Race cars
• Packaging equipments
• Bakery machines
• Textile machinery
• Road building machinery
• Lifts
• Hydraulic cylinders
• Printing machines
• Welding tools
• Water turbines
• Positioning systems
• Wind turbines
• Satellite dishes

• What Are the Dimensional Specifications of Rod End Bearings?

Rod end bearings are different in features and dimensional specifications. The dimensional specifications of the rod end bearings are as follow:

• Rod end bearings have English units known as inches and parts of inches.
• Rod end bearings are available in Metric units labeled as centimeter and millimeter.
• Rod end bearings consist of a bore diameter which is the inside diameter measurement of the hole.
• Rod end bearings consist of nominal diameter on the topside of the thread which is referred as major diameter.
• Rod end bearings measure the thickness of the bearing which is marked as the distance of the hole.
• Rod end bearing have a housing diameter which is referred as the external diameter.

• How Are Rod End Bearings Treated when Exposed to Corrosion?

Rod end bearings made of steel are more exposed to corrosion or rusting. Rod end bearings are subjected with heat procedures or a paint and is layered with different materials for protection against corrosion. Corrosion occurs as a result of exposure to acids, bases, water and minerals. Materials for coating are listed below:

• Anodizing layer
• Powder layer
• Zinc plating
• Chrome plating
• Nickel plating
• Phosphate layer
• Copper plating
• Cadmium plating
• Stainless steel 

Such type of bearings with cadmium plating are less exposed to corrosion when it comes in contact with the salt water.

Most often, rod end bearings are layered with zinc plating because it is inexpensive. Zinc plating has less variety of colors while chrome plating offers various types of color plating. 

Zinc-Nickel coating is best as it has no chance of corrosion. It is mostly done on aerospace machines. 

Anodizing plating is referred as aluminum plating which is highly resistant to corrosion. 

Rod end bearings with stainless steel are corrosion resistant. When stainless steel rod end bearings are dipped in the mixture of nitric acid and chrome, the surface is cleaned and protected against rusting which is very effective. 

• Which Rod End Bearings Are Corrosion Resistant?

Stainless steel rod end bearings have greater resistance to corrosion. They have a diameter of 5mm to 30mm. 

When stainless steel rod end bearings are mixed with solvents of nitric acid and chrome, the surface is cleaned and well prepared against corrosion. 

Stainless steel rod end bearings are widely used in appliances like food machinery, in aerospace, shipbuilding as well as in medical industry. 

Stainless steel is used in the inside rings of the rod end bearings to prevent rusting. 

Stainless Steel Rod End Bearing

• Is Sealing required for Rod End Bearings? Name the Types of Sealing?

Specific bearings are embedded with essential seals. The purpose of sealing is to protect the foreign agent to enter the inner part of the bearings. Sealing helps to stops leakage of the grease. The types of seals used for rod end bearings are:

• Washer seals

Washer seals are used in rod end bearings. They are measured in inches as well as in millimeters. 

Washer seals are made of yellow-chromate material including rubber or neoprene which has a greater strength. This neoprene rubber covers the rod end bearings from both sides and stop leakage of oil, gasoline as well as fluids.

• Neoprene seals

Such seals are used in rod end bearings and helps prevent wear and corrosion. In this case, tighten the rubber carefully to avoid any damage of the seal. 

• How to Mount Rod End Bearings?

For mounting of rod end bearings the ends of the pins, rotating shaft and the boundaries of the housing consist of a chamfer at an angle of 10⁰ – 20⁰.

Such type bearings are easily fixed without facing damage. For mounting of such bearings, they must make an angle of 90⁰ with the axis of external hoop. If such condition is not applied, this may cause wear quickly and the rod end bearing is not durable for lifetime. 

Avoid use of hammer to place or insert any bearing into the exact place. Mounting force is needed on the ring instead on the contact surfaces. A press-fit tool must be used to support the mounting of rod end bearings. 

When mounting the rod end bearing, external hoop is inserted or fitted in the housing. This will result in preventing the rotation of loads. Internal ring may suffer a clearance fit based on shaft. 

Mounting Rod End Bearing

• List the Points to focus when Installing and Removing Rod End Bearings?

Installing and removing of rod end bearing must be done carefully to avoid any damage. The main points to focus when performing such activity are as follows:

• When the press-fit for rod end bearings is not given or missed somewhere, you must install it with the aid of hammer. The force applied by hammer must be evenly distributed among the parts of the rings and should not cause any damage to the bearing.
• The amount of pressure needed to install rod end bearing is linked with the size and interfering of joint. There is a hot type fitting of large sized rod end bearings. The heating temperature must not exceed 100⁰C.
• When rod end bearings are excluded from the heating tanks or oils, they must be cleaned as soon as possible. 
• Now cool the rod end bearings and then tighten them with the help of hammer. 
• When the external hoop of the rod end bearings and the bore of the housing are fixed strongly, the housing is heated and then inserted into the joint bearings.

• What Is Service Life of Rod End Bearings?

Service life is the life about which a bearing can perform efficiently before a failure occurs. It is also referred as a bearing life. 

The service life of rod end bearings is based on various factors which cannot be evaluated with precision. Service life of rod end bearings is determined by noise, vibration, wear and corrosion. 

Service life of rod end bearings is increased when a little amount of load is applied and by calculating running speed. Such as:

Gh= Service life

C= Bearing capacity

P= Equivalent load of bearing

K= diameter of the internal hoop

β = angle of the swing (180⁰)

Formula for service life 

Gh=b1.b2.b3kβf.107.C/P

• Are Retainers Used for Rod End Bearings? Name their Types?

Retainers are used to balance the space between the balls and the race. Retainers have effects on internal clearance of bearings, space and housing damage when replacing. The different types of retainers are:

• Threaded form retainer

This form of retainer is used in rod end bearings which offer easiness in replacing the bearing. It can bear greater axial load.

• Bolted-plate retainer

This type of retainer is used in rod end bearing. With this retainer, the space is increased. It has high retention power.

• House staking retainer

This type of retainer is used when the space is not given on the rod end bearing.  The house staking retainer is fixed in one side of the housing.

• How to Cure Failure of Rod End Bearings?

Rod end bearings fail when the performance is decreased to a greater extent due to various reasons. This failure puts never-ending consequences on rod end bearings. The reasons of failure are stated as:

• When the dirt and dust particles, water, salt and other substances enter the rod end bearings, they all result in contamination. Marks and overlapping often causes contamination. In this case, proper sealing is required to prevent entry of foreign agents.
• When the grease color is changed, this is a marker for lubrication failure in rod end bearings. In such case, lubricate the rod end bearing with good quality lithium based grease. 
• Misalignment results in replacing the ball from its’ exact place and the temperature increases. So, make an angle with the ball which does not let it tilt in any way.
• Forceful hammering when installing and removing a rod end bearing results in damage of the races of rod end bearings. Avoid using hammer in a forceful way to prevent from any damage.

LLG bearing workers are always present to guide their customers about the product they are intended to order. For further details, just ring to the technicians of LLG bearing to get yourself satisfied.