BALL BEARINGS – All series and sizes

Ball bearings in all series and sizes

Theball bearings are among the most commonly used rotational guidance elements in mechanical engineering. They allow a shaft to rotate with low friction while supporting radial loads and, depending on their design, some of the axial forces.

They are used in agricultural machinery as well as in industrial applications, electric motors, gearboxes, conveyors, fans, pumps, material-handling equipment, and a wide range of mechanical equipment.

Camagris offers an extensive product line covering the main standardized series:6000, 6200, 6300, 6400, 16000, 61800, 62200, 4200, 4300, 3200, 7200, 7300, as well as ball thrust bearings from the 51100, 51200, and 51300 series.

The products are available in various designs to meet requirements for sealing, speed, internal clearance, and load capacity.

How do you choose a ball bearing ?

To select a bearing correctly, four factors are particularly important.

The bearing part number

If the part number is still legible on the old bearing, use that number first.

An entry such as6205 2RS already provides several pieces of information: the bearing family, its size series, and its sealing type.

The inner diameter

The inner diameter corresponds to the shaft diameter.

For standard part numbers with a bore code of 04 or higher, the last two digits are generally multiplied by five.

Thus:

6204 is equivalent to 20 mm.

6205 corresponds to 25 mm.

6206 corresponds to 30 mm.

6207 is equivalent to 35 mm.

6208 corresponds to 40 mm.

6210 is equal to 50 mm.

The outer diameter

Two bearings designed for the same shaft may have very different outer diameters depending on their series.

A 6005, a 6205, and a 6305 all have a 25-mm bore, but their outside diameters and load capacities are not the same.

The width of the bearing

The third important dimension is width, sometimes denoted by B.

To identify a bearing with an illegible part number, always record all three dimensions:

inner diameter d × outer diameter D × width B.

6000 Series Deep Groove Ball Bearings

The series6000 is a relatively lightweight and compact series.

It is particularly well-suited when space is limited or when the loads are moderate.

These include the following references:

6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6008, 6009, 6010, and larger sizes.

These bearings are used in many transmissions, motors, fans, pumps, and agricultural equipment.

6200 Series Ball Bearings

The series6200 is probably the most commonly used family of deep-groove ball bearings.

It offers an excellent balance between size, maximum speed, and load capacity.

Among the most sought-after items:

6202

6203

6204

6205

6206

6207

6208

6209

6210

6211

Part numbers 6204 through 6208 are extremely common in agricultural and industrial machinery.

6300 Series Ball Bearings

The6300 are bulkier than the 6200s with an equivalent inner diameter.

They generally have a larger outer diameter and width, which allows them to support heavier loads.

Common references include, among others:

6303

6304

6305

6306

6307

6308

6309

6310

6311

For example, a 6205 and a 6305 are both designed for a 25-mm shaft, but they are not interchangeable: their outer diameters and widths are different.

6400 Series for Higher Radial Loads

The series6400 uses an even larger cross-section.

It is suitable when the application requires a rigid ball bearing with a high load capacity and the available space allows for it.

As with the other series, the dimensions of the housing and the shaft must be strictly adhered to.

What does "2RS" mean on a bearing ?

The suffix2RS usually indicates that the bearing has an elastomer seal on each side.

Seals help retain grease and limit the entry of dust, moisture, and other contaminants.

2RS bearings are particularly common on:

agricultural machinery ;

conveyors ;

wheels and rollers ;

equipment exposed to dust ;

mechanisms that do not have permanent external lubrication.

Depending on the manufacturer, the exact designation may vary.

These include, among others:

2RS

2RS1

2RSH

2RSR

DDU

LLU.

These suffixes refer to solutions that are comparable in terms of their general function, butThe exact design of the seals may vary by brand.

What is the difference between 2RS and ZZ or 2Z ?

A bearing2RS has two contact or near-contact seals made of synthetic material.

A bearing2Z or ZZ has two metal flanges.

2RS generally provides better protection against moisture and contaminants.

The 2Z generally produces less friction and may be suitable for higher speeds in a relatively clean environment.

An open bearing has neither a rubber seal nor a metal flange and is primarily used when it operates in a lubricated housing or when external lubrication is provided.

What does C3 mean ?

The suffixC3 refers to radial internal clearance that is greater than the bearing's normal clearance.

This additional clearance may be necessary when the bearing is in operation:

At high speed ;

At high temperatures ;

with a snug fit ;

or when thermal expansion reduces the clearance during operation.

A C3 bearing is therefore not automatically “better” than a standard-clearance bearing.

The selection must correspond to the application specified by the manufacturer.

2RS C3 Bearing

The two pieces of information can be combined.

For example:

6205 2RS C3

refers to a size 6205 bearing that is sealed on both sides and has an internal clearance of C3.

Do not confuse:

6205

6205 2RS

6205 2Z

6205 C3

6205 2RS C3.

They generally have the same external dimensions but not necessarily the same operating characteristics.

4200 and 4300 Series Double-Row Ball Bearings

TV Shows4200 and 4300 have two rows of balls.

They make it possible to increase load capacity within a relatively compact footprint.

Camagris offers products such as:

4202

4204

4205

4206

4207

4208

4209

4210

4212

4305

4306

These part numbers should not be confused with the double-row angular contact bearings in the 3200 series.

3200 Series Double-Row Angular Contact Bearings

Bearings in the series3200 use two rows of balls arranged to simultaneously withstand radial and axial forces.

They are particularly useful when the shaft needs to be guided axially in both directions while maintaining a compact design.

These include the following references:

3201

3202

3203

3204

3205

3206 and larger sizes.

Some items are also available in aWaterproof 2RS.

7200 and 7300 Series Angular Contact Bearings

TV Shows7200 and 7300 are angular contact ball bearings.

Unlike a standard rigid bearing, their raceways are designed with a contact angle that allows them to handle high axial loads in one direction.

They are used, in particular, in transmissions, spindles, pumps, gearboxes, and mechanisms that require precise axial guidance.

The 7300 series generally has a larger cross-sectional area than the 7200 series.

Ball thrust bearings, series 51100, 51200, and 51300

References51100, 51200, and 51300 are ball bearings.

They are designed primarily to handleaxial loads.

They must not be used as conventional radial bearings.

A ball thrust bearing generally consists of two washers and a cage that holds the balls.

They are found in mechanisms where a shaft exerts a thrust along its axis.

16000 and 61800 Thin Series

TV Shows16,000 and 61,800 offer bearings with a small cross-sectional area.

They help reduce radial and, in some cases, axial space requirements when space is limited.

They are used in more compact mechanisms but do not have the same load-carrying capacity as a Series 6200 or 6300 bearing with the same inside diameter.

62200 Series, Extra-Wide

The series62200 uses the same design as a rigid ball bearing but is wider than a standard 6200 bearing.

For example, both the 62205 and the 6205 have an inner diameter of 25 mm and an outer diameter of 52 mm, but the 62205 is wider.

Therefore, they are not interchangeable when the housing has been designed for a specific width.

Comparisons Between Major Brands

Standardized dimensional specifications are used by the world's leading bearing manufacturers.

A basic bearing such as6205 can thus be offered by, among others:

SKF

FAG / Schaeffler

NTN

SNR

NSK

Koyo / JTEKT

Timken

Nachi

and various manufacturers of generic bearings.

The dimensions of a standardized part number generally remain the same, but the suffixes may vary by manufacturer.

For example, a double-seal may be listed under designations such as 2RS, 2RSH, 2RSR, DDU, or LLU.

Therefore, it is necessary to compare not only the base part number but also the seal, internal clearance, cage, and other suffixes.

Agricultural Applications of Ball Bearings

Ball bearings are found in virtually every type of agricultural machinery.

They can be found, among other places, at:

tractors ;

combine harvesters ;

forage harvesters ;

bale presses ;

mowers ;

windrowers ;

tedders ;

conveyors ;

coarse-threaded screws ;

Elevators ;

Spreaders ;

seeders ;

shredders ;

fans ;

pumps ;

wheels and rollers ;

gearboxes and transmissions.

The choice of seal is particularly important when the bearing is operating in the presence of dust, dirt, moisture, or plant debris.

How can I find a bearing based solely on its dimensions ?

If the reference mark has been completely erased, measure carefully:

the inner diameter ;

the outer diameter ;

the width.

For example:

25 × 52 × 15 mm corresponds, in particular, to the standard size of a6205.

30 × 62 × 16 mm corresponds to a6206.

35 × 72 × 17 mm corresponds to a6207.

40 × 80 × 18 mm corresponds to a6208.

Next, you need to identify the type of seal and, if necessary, the internal clearance.

Frequently Asked Questions About Ball Bearings

What is the difference between 6205 and 6305 ?

Both have an inner diameter of 25 mm, but the 6305 has a larger outer diameter and width. It therefore has a more robust construction.

What are the dimensions of a 6205 ?

The 6205 bearing measures25 × 52 × 15 mm.

What are the dimensions of a 6206 ?

The 6206 measures30 × 62 × 16 mm.

What are the dimensions of a 6207 ?

The 6207 measures35 × 72 × 17 mm.

What are the dimensions of a 6208 ?

The 6208 measures40 × 80 × 18 mm.

What does 6205 2RS mean ?

This is a 6205 bearing equipped with a seal on each side.

What does 6205 C3 mean ?

C3 indicates internal clearance greater than normal.

What is the difference between the 6205 2RS and the 6205 2RS C3 ?

The dimensions are normally the same. However, the 6205 2RS C3 has greater internal clearance.

Can an SKF bearing be replaced with an FAG, NTN, or NSK bearing ?

When the base part number, dimensions, and additional specifications match, a dimensional replacement is generally possible. However, it is necessary to check the suffixes related to sealing, clearance, the cage, and any special designs.

Does a 2RS bearing need to be relubricated ?

Standard 2RS deep-groove ball bearings are generally supplied pre-lubricated and sealed. They are not normally designed to be relubricated like a bearing equipped with a grease fitting.

Which bearing should you choose for an agricultural machine ?

If the original part number is known, use that part number and its suffixes as a priority. If it is unknown, measure the dimensions and determine the operating environment, speed, load, and contamination level.

Buy your ball bearings at Camagris

Camagris currently offers181 references in this category, including many models from the 6000, 6200, and 6300 series that are available quickly.

To find the right bearing, use the part number listed on the old model or filter by inner diameter, outer diameter, and width.

If in doubt, note the three main dimensions as well as any suffixes listed on the bearing before placing your order.