Installation method and use of single row deep groove ball bearings

Bearings are precision components, and thus require considerable caution when used, even using the high performance of single row deep groove ball bearings, if used incorrectly, could not achieve the desired performance, and easy to make bearing damage. Therefore, you should be aware of the following considerations:

First, keep the bearings and the surrounding environment clean

Even if invisible dust into the bearing, bearing wear, vibration and noise will increase.

Second, be careful when you install

Do not punch powerfully, does not tap the bearings directly with a hammer and transmitting pressure on bearing through the rolling elements pressure is not allowed. Don’t open the single row deep groove ball bearings package until installing. General grease lubrication, do not clean bearings and fill the grease directly. Oil lubrication, generally do not have to clean, however, instruments or high speed bearings,clean bearing with clean oil, removing rust inhibitor coating on the bearing. Bearings after removing rust, are easy to rust, so they cannot be placed at random.

Third, use appropriate and accurate installation tools

Installing approach of single row deep groove ball bearings varies due to the bearing structure, conditions and fit. As generally are axis rotation, take the inner ring interference fit. Bearings with a cylindrical bore installation, press into with the press, or hot charging method. Bearing with tapered bore installation, directly fix on the tapered shaft or using an adapter sleeve. Using special tools as much as possible, avoiding using fabric and staple fiber or something.

Four, prevent corrosion of the bearings

Fully wash away the sweat on his hand when taking bearings directly by hand, and coated with high quality mineral oil before operation, paying particular attention to rust during the rainy season and summer.

However, in some special operating conditions, single row deep groove ball bearings get more longer life than the traditional calculation, especially under light load conditions. These special conditions are, when scrolling surface (track and rolling elements) is effectively separated by lubricant film and limiting surface damage caused by pollutants. In fact, in ideal conditions, the so-called permanent bearing life is possible.

Bearing life

Single row deep groove ball bearing life is detemined revolutions (or number of working hours in a certain speed), definition: bearings within this life, in any of its initial fatigue damage to the bearing rings or rolling on (off or defect). In tests in the laboratory or in actual use, however, can be clearly seen, looks the same bearings under the same working conditions, real life vary greatly. In addition there are several different definitions of bearing “life”, one of the so-called “working life”, represents a single row deep groove ball bearings in real life can be achieved before the damage is caused by wear and tear, damage is usually not the fatigue, but rather caused by wear and tear, corrosion, seals damage reasons.

TECHNOLOGY TRANSFER FROM LOW TORQUE AUTOMOTIVE BEARINGS BRINGS ENERGY, EFFICIENCY & SIZE SAVINGS TO MRO AUTO SECTOR

TECHNOLOGY TRANSFER FROM LOW TORQUE AUTOMOTIVE BEARINGS BRINGS ENERGY, EFFICIENCY & SIZE SAVINGS TO MRO AUTO SECTOR : News from NSK Europe Ltd.

Across the global automotive sector, NSK is well known for providing bearing solutions that achieve reduced weight and size and low torque for automobiles, via its four core technologies: tribology, materials, analysis and mechatronics. These solutions meet all the needs of the automotive sector in reducing power consumption and emissions, and in enabling more efficient integration of the engine and electrical system, or engine and electric motors in the case of hybrid vehicles.

The thrust of these developments, based upon core technologies, has not been limited solely to vehicles. NSK has used technology transfer to effectively bring the same low torque, low power benefits to general purpose bearings used in all areas of industrial production, MRO, construction, quarrying, mining and domestic appliances. In addition, NSK is also working on calculations to quantify savings in energy and cost when low torque bearings are applied over standard. This will be used to quantify cost and energy contributions for a whole site or even series of sites. This is particularly important when customers are being audited for carbon footprint and for evidence of green credentials.

Installation and removal of SKF 623 single row deep groove ball bearings

Files download: https://docs.google.com/document/d/1bOu_8uCmO1j5i3PiaaDzEOAvb7dvoUd6Ky_SXyCiY1g/edit?pli=1

Notes
Install bearings in a clean environment. Check the bearing housing, shaft and bearing components to ensure that it is clean.

The bearings should be left in the original packaging until the moment before installation to prevent pollution.

Size and shape tolerances of all components in contact with the bearing should be checked.

The diameter of cylindrical shaft neck, usually uses a micrometer to measure each of the four points of the three planes. Survey record forms can be obtained here. Filling out the measurement records and archives appropriately helps future tracking.

The bore diameter of the cylindrical bearing box, usually uses inner gauge to measure each of the four points of the three planes. Survey record forms can be obtained here. Filling out the measurement records and archives appropriately helps future tracking.

Install Program
Wipe off the rust inhibitor in bearing bore and the cylindrical surface.
If bearings greased and use in extremely high or low temperatures, or grease and rust inhibitors are not compatible, it need to be carefully cleaned and dried.

Axis is an interference fit
Slightly lubricate the hole of the bearing with mineral oil.
Ensure that the bearing is vertical with axis after installed.
When installing, use appropriate sleeve to force on the inner ring.

The bearing box for the interference fit
Slightly lubricate the outer peripheral surface of the bearing with mineral oil.
Ensure that the bearing is vertical with bearing box after installed.
When installing, use the appropriate sleeve to force on outer ring.
Shaft and bearing box for interference fit
Slightly lubricate the inner-hole of the bearing with mineral oil.
Slightly lubricate the outer peripheral surface of the bearing with mineral oil.
Ensure that the shaft and bearing box are perpendicular to the axis after adapted and installed.
When installing, use the appropriate sleeve to force on the inner and outer rings at the same time.
Push the bearing to the correct location.
Fit with locking devices.
Determine shaft or outer ring can easily turn.
Bearings lubricate using oil, pay attention to use the correct lubricants and dosage.
Bearings lubricate using grease, be coupled with the grease.
If the bearing is to be put into the shaft and the bearing box both, grease may needs to earlier be added.
Under normal circumstances, this bearing should be completely filled grease, except applied to high speed. Fill grease in the remaining space in the bearing box (approximately 30-50%).
SKF grease LGMT 2 can be used for the general working conditions. Considering the actual working conditions to select grease, see SKF condensed grease selection guide.

How to completely rebuild a ball bearing

Note: You should probably grease or lube your bearings (after cleaning them) if you are using them for their intended purpose. I was going to use these bearings for something that didn’t require fast rotational speed, so that’s why I didn’t lube them.

Instructional video on how to disassemble, clean, and reassemble a ball bearing. Here it’s a standard skateboard wheel ball bearing. The procedure should be similar for most other types of ball bearings, including for bikes, motorcycles, rc cars, etc.

Approach to deep groove ball bearings trouble

When checking the deep groove ball bearing equipment after periodic maintenance, operation and replacement of external parts of deep groove ball bearings are removed, you need to determine whether deep groove ball bearing parts in sequence can be used again and record the use of good or bad. Also carefully investigate and record down the appearance of deep groove ball bearing. In order to identify and investigate remaining quantity of lubricant, after sampling, properly wash deep groove ball bearings. In order to achieve higher device performance and minimum maintenance costs reliably, you must follow the correct approach. This includes the storage, removing, cleaning, testing and installation of deep groove ball bearings. Service life of any deep groove ball bearing depends largely on maintenance and care it receives. In industrial applications, in particular, often poor working conditions, loads, dust and pollution is a common scale.

Secondly, check damage and abnormalities of the raceway of deep groove ball bearings, rolling surface and the mating surfaces and wear of the cage, in particular to observe the running track of the raceway surface. Judge whether the bearing will use again after considering how bearing damages, machine performance, importance, operating condition, inspection cycles ,etc.

In inspection results, if found deep groove ball bearings are damaged and exceptional conditions, follow the identified cause of bearing damage to formulate policy responses. Also, check the results, if deep groove ball bearings have several flaws(inner and outer rings, rolling elements, cages, any exists cracks and debris), they cannot be used again, need to be replaced with a new one.

It applies to all anti-friction deep groove ball bearing design. Deep groove ball bearings are stored with special corrosion resistant coatings available for selection, but the majority of deep groove ball bearings are made of anti-corrosion material. When handling and storing deep groove ball bearings, you must take care to ensure that they will not rust or corrode. Even wet or unprotected chemical gloves left by hand causing etching in a small area, which could lead to fatigue of deep groove ball bearings.

Common problems and solutions When installing deep groove ball bearings

1, Any requirements on the mounting surface and the installation location of deep groove ball bearings?

Yes. If the scrap iron, burrs, dust and other impurities from entering in deep groove ball bearings, the bearing in operation will produce noise and vibration, or even damage deep groove roller and steel balls. Therefore, before the installation of deep groove ball bearings, you must make sure that the installation surface and environment clean.

2, Do deep groove ball bearings need cleaning before installation?

Deep groove ball bearings are coated with antirust oil, you need to carefully clean them with cleaner gasoline or kerosene, and then coated with a clean high quality or high temperature lubricant before installation. Influence of cleanliness on the service life of the bearing and vibration noise was considerable. But what we want to remind you is: sealed bearings do not need cleaning and refueling.

3, How to choose the right grease?

Lubrication on the operation and life of has a very important impact on the deep groove ball bearings. I briefly describe the general principles of selection of deep groove ball bearing grease. Grease is made of base oils, thickeners and additives. Grease functions of different types and same type with different brands vary, be sure to pay attention to duing to corresponding speed limit is different. Grease performance mainly determines by the base oil. Low viscosity base oil is suitable for low temperature, high speed situation, while high viscosity oil is suitable for high temperature, high-load situation. The thickener is also related to the lubrication function. Water resistance of the thickeners determines the water resistance of the grease. In principle, grease with different brands cannot be mixed, and, even if grease with the same kind of thickeners, also has a negative impact on each other due to different additives.

4, The more grease,the better when lubricating the deep groove ball bearings?

When lubricating bearings, the more grease,the better, this is a common misconception. Too much grease in bearings and bearing interior will cause excessive mixing of oils and fats, which results in extremely high temperatures. Number of bearing lubricant filling is covered with 1/2~1/3 bearing internal space,reduced to one-third when high speed.

5, How to install and disassemble the deep groove ball bearings?

Do not hammer directly on the surface and non-bearing surface of deep groove ball bearing when installation. Let bearing be an average force with block, sleeve or other installation tools (Tools) . Never install using the ball driving force. If the mounting surface is coated with lubricating oil, it will make the installation more smooth. If combined with interference is greater, put bearing in mineral oil, heated to 80~90℃ and install as soon as possible. Strictly control oil temperature not exceeding 100 ° c to prevent the effect of tempering hardness reducing the impact and recovery. Removing when you encounter problems, we recommend that you use the removal tool to pull on the inner ring at the same time carefully pouring hot oil, and heat makes the bearing inner ring expanding so that making it more prone to shedding.

How to Install Deep Groove Ball Bearing?

Deep groove ball bearings are used in a particularly wide variety of applications. Consequently, they are available in many executions and sizes. The standard SKF range comprises the following types:

– single row deep groove ball bearings
– SKF Energy Efficient deep groove ball bearings
– single row deep groove ball bearings with filling slots
– stainless steel single row deep groove ball bearings
– double row deep groove ball bearings
– single row hybrid deep groove ball bearings, see section “Engineering products – Hybrid bearings
– single row deep groove ball bearings for high temperatures, see section “Engineering products – Bearings and bearing units for high temperatures”
– cam rollers, see section “Track runner bearings – Cam rollers”
– polymer ball bearings, see section “Engineering products – Polymer ball bearings

Deep groove ball bearing is installed correctly is very important, following a few steps outline the main points of the installation of deep groove ball bearings:

Preload requirements

  • For the required precision deep groove ball bearing drive, such as deep groove ball bearing spindle, there are often preload requirements. These deep groove ball bearing preload are reasonable, in order to achieve the nominal accuracy. Deep groove ball bearing preload is generally factory-supplied parameters. The traditional rule of thumb is often the assembly workers install. You can use pre-measured amount of preload deformation method in some structure. Obtained after deformation, the structure design in a tightening gasket, the gasket is just pretension height difference before and after the change. In this way, tighten the nut to ensure death, preload volume remains unchanged.

Clearance before installation

  • If there are burrs, dirt and other foreign matter go into the deep groove ball bearing iron filings, deep groove ball bearings will generate noise and vibration when in operation, or even damage the raceway and rolling elements. Therefore, when install deep groove ball bearings, you must ensure that the mounting surface and installation of the environment clean.
  • Deep groove ball bearings should be cleaned before the installation. Coated with anti-rust oil, you must use gasoline or kerosene to clean carefully and then coated with clean, high-quality, high-speed or high-temperature grease before installation. Cleanliness of deep groove ball bearing will impact the service life and vibration noise is very large.

How to choose the grease

  • How to choose the grease lubrication of deep groove ball bearing that influences the operation and life importantly. Here to brief you the general principles to choose grease. Generally low-viscosity base oil for low temperature, high-speed; high viscosity for high temperature, high load. Thickener is also related to lubrication, grease thickener of water determines the water resistance. In principle, the grease cannot mix different brands, and even if the same kind of grease thickener, also because of the different additives adversely affect each other. Deep groove ball bearings and grease will cause too much room over oil mixing, resulting in extremely high temperatures.

Deep groove ball bearing installation

  • How to install and remove the hammer when installed directly face deep groove ball bearing and non-force side, should be briquetting, sleeve, or other deep groove ball bearing installation tool to make uniform force. If the mounting surface coated with oil, the bearing will be installed more smoothly. Deep groove ball bearings should be placed in mineral oil heated to 90 – 100 ℃ immediately after installation. Difficulty in dismantling, it is recommended that you use the removal tool to pull the inner ring, while carefully poured on the hot oil, deep groove ball bearing inner ring heat will expand, making it easier to fall off.

How to choose the appropriate clearance conditions

  • All of the deep groove ball bearings require minimum clearance work; you must choose the appropriate clearance conditions. Rolling deep groove ball bearing radial clearance group is divided into five groups -2, 0 group, 3 groups, 4, 5 groups, followed by small to large clearance value, where 0 is the standard clearance group. Basic radial clearance group for general operating conditions, temperature, and commonly used conventional interference fit; at high temperature, high-speed, low noise, low friction to work under special conditions such as deep groove ball bearing; of precision spindle, machine tool spindles with deep groove ball bearings, etc. should use a smaller radial clearance; for deep groove ball bearing roller can maintain a small amount of clearance work. In addition, separate type of deep groove ball bearings are indifferent clearance; Finally, deep groove ball bearing clearance work after installed, install the front than the original clearance is small, because the deep groove ball bearings to withstand a certain load rotation, there are deep groove ball bearing and load produced with the elastic deformation. Rolling deep groove ball bearing clearance and preload adjustment process is to improve the precision deep groove ball bearing swivel and carrying capacity, reduce vibration and noise transmission effective means. Assembly work should clarify the concept of deep groove ball bearing assembly clear the technical requirements, while also taking into account the deep groove ball bearing temperature control and good lubrication, the right way to use this process to ensure the ball rolling groove the quality of the bearing assembly.

Article Resource :http://www.isutami.com/topic/t12050901/The-Installation-Of-Deep-Groove-Ball-Bearings.html.Check more about deep groove ball bearing topic,see at http://www.ballbearing-china.com/how-to-install-deep-groove-ball-bearing.html