BEARINGS AND BEARING INSERTS FOR AGRICULTURAL USE

Agricultural Bearings and Bearing Inserts

Thebearings, also known as insert bearings or self-aligning bearings, are specifically designed to be mounted in housings with a spherical inner raceway.

Unlike a standard rigid ball bearing, their outer ring has a geometry that allows the bearing to rotate slightly within its housing. This feature compensates for minor static misalignments between the shaft and the bearing.

They are used primarily in agriculture, where trees, frames, and supports may be subject to vibrations, deformation, or harsh operating conditions.

The Camagris line currently includes several complementary product families:YAR, GRAE, GE, UC, and 204 through 210-NPP-B. The category currently includes 32 items.

Why are there several series of bearings ?

Two bearings with the same inner diameter and the same outer diameter are not necessarily interchangeable.

The main differences are as follows:

– the width of the outer ring ;

– the width of the inner ring ;

– the shaft mounting system ;

– the presence of an eccentric ring ;

– the number of center drill bits ;

– the lubrication system ;

– the type of joints ;

– the total width of the bearing, including its clamping device.

It is therefore important to determine not only the diameter of the shaft, but also theexact bearing family.

The main series offered by Camagris

YAR Series – Mounted with two set screws

BearingsYAR have a wide inner ring that extends on both sides and are secured directly to the shaft usingtwo set screws.

The outer ring is spherical and allows for self-alignment in a suitable housing.

Camagris currently offers:

YAR204-2F – shaft Ø20 mm

YAR205-2F – shaft Ø25 mm

YAR206-2F – shaft Ø30 mm

YAR207-2F – shaft Ø35 mm

YAR208-2F – shaft Ø40 mm

YAR209-2F – shaft Ø45 mm

YAR210-2F – shaft Ø50 mm

YAR211-2F – shaft Ø55 mm

YAR212-2F – shaft Ø60 mm.

The suffix2F means that execution is protected on both sides.

Bearings in this series are widely used in bearing housings, conveyors, simple drive systems, and agricultural machinery.

YAR Series Correspondences

According to the manufacturer, the main product families include:

SKF: YAR

INA / FAG: GYE…-KRR-B

SNR: UC / UC…G2 series, depending on the model

NTN: UC…D1 family

NSK: UC…D1 series

However, we must remain cautious:A YAR and a UC of the same size are not always exactly identical in all dimensions.

For example, some YAR205 models have an outer ring width that differs from that of certain UC205 models. Therefore, you must check the C dimension before confirming a substitution.

The cross-brand comparison tables show that the YAR, GYE, and UC families are functionally similar, but dimensional verification remains essential.

GRAE Series – Eccentric Ring Mount, Compact Version

TheGRAE are insert bearings equipped with aeccentric locking ring.

When the eccentric ring is rotated in the same direction as the shaft and then secured with its screw, it gradually tightens the inner ring of the bearing onto the shaft.

The GRAE series features a relatively compact design, with an inner ring that is narrower than that of the GE series.

Camagris offers:

GRAE20-XL-NPP-B – shaft Ø20 mm

GRAE25-XL-NPP-B – shaft Ø25 mm

GRAE30-XL-NPP-B – shaft Ø30 mm

GRAE35-XL-NPP-B – shaft Ø35 mm

GRAE40-XL-NPP-B – shaft Ø40 mm

GRAE45-XL-NPP-B – shaft Ø45 mm

GRAE50-XL-NPP-B – shaft Ø50 mm

GRAE55-XL-NPP-B – shaft Ø55 mm

GRAE60-XL-NPP-B – shaft Ø60 mm.

Letters from the GRAE Series

The main comparison categories are:

INA / FAG: GRAE…-XL-NPP-B

SKF: YET 200 Series

SNR: ES 200 Series

NTN: AEL 200 Series

NSK: AEL depending on the model

The BBC-R table explicitly compares the familiesGRAE, SKF YET, SNR ES, and NTN/NSK AEL. 

However, even if the parts fit together, it is still necessary to check the overall width and the joints.

GE Series – Eccentric Ring and Wide Inner Ring

The seriesGE…-KRR-B It also uses an eccentric locking ring, but its design is wider than that of a GRAE.

The inner ring extends on both sides, providing a large contact surface on the shaft.

Camagris currently offers:

GE25-XL-KRR-B – shaft Ø25 mm

GE30-XL-KRR-B – shaft Ø30 mm

GE35-XL-KRR-B – shaft Ø35 mm

GE40-XL-KRR-B – shaft Ø40 mm

GE45-XL-KRR-B – shaft Ø45 mm

GE50-XL-KRR-B – shaft Ø50 mm.

For example, theGE40-XL-KRR-B It is specified with a bore of 40 mm, an outside diameter of 80 mm, an outside width of 21 mm, and a total width of 56.5 mm. The Camagris data sheet also lists the equivalent SKF YEL208-2F, SNR EX208G2, and NTN UEL208D1 part numbers.

Letters from the GE Series

INA / FAG: GE…-KRR-B

SKF: YEL 200 Series

SNR: EX 200 Series

NTN: UEL 200 Series

NSK: EW / UEL, as listed in the catalogs

Mapping tables really bring families closer togetherGE, YEL, EX, and UEL. 

Series 204 to 210-NPP-B – without integrated clamping system

Bearings204-XL-NPP-B through 210-XL-NPP-B form a different family.

They have:

– a spherical outer ring ;

– a standard-width inner ring ;

– no off-center necklaces ;

– no clamping screws.

Whether the bearing remains on the shaft therefore depends on the fit specified during assembly.

Camagris offers:

204-XL-NPP-B – 20 × 47 × 14 mm

205-XL-NPP-B – 25 × 52 × 15 mm

206-XL-NPP-B – 30 × 62 × 16 mm

207-XL-NPP-B – 35 × 72 × 17 mm

208-XL-NPP-B – 40 × 80 × 18 mm

209-XL-NPP-B – 45 × 85 × 19 mm

210-XL-NPP-B – 50 × 90 × 20 mm.

These part numbers should not be confused with standard bearings such as 6204, 6205, 6206, etc.: theirThe outer ring is spherical in order to operate within a suitable bearing housing.

Matches from the NPP-B series

INA / FAG: 204 to 210-XL-NPP-B

SKF: 1726204 to 1726210-2RS1

Former FAG part numbers: 76204 through 76210-2RSR

SNR: 6204SEE through 6210SEE

NSK: 1726204 to 1726210-2RS

The BBC-R table directly compares the INA 20..NPPB, SKF 17262..-2RS1, SNR 62..SEE, and NSK 17262..-2RS families.

UC Series – Needle Roller Insert Bearing

The seriesUC is one of the most common in the UCP, UCF, UCFL, and UCFC complete bearing assemblies.

It uses a wide inner ring and a pin-screw fastening system.

The category currently includes, among other things, aUC207. 

UC units are commonly used in complete cast iron bearings. They are particularly useful when the customer wants to replace only the bearing insert without changing the housing.

Note: The UC series must be distinguished from the YAR series in the technical data when the outer ring widths differ.

Helpful Chart: Which Family Should You Choose ?

There are two set screws on the inner ring

Prioritize searching for:

YAR

GYE

UC

Next, check the total width and the width of the outer ring.

You have an eccentric clamping ring and a compact design

Search for:

GRAE

SKF YET

SNR ES

NTN AEL

You have an eccentric ring and a very wide inner ring

Search for:

GE

SKF YEL

SNR EX

NTN UEL

You don't have any screws or eccentric rings

Search for:

204 to 210-NPP-B

SKF 17262…

former FAG 762…

SNR 62…SEE

How do you correctly identify a bearing ?

Note the part number printed on the bearing

This is the most reliable method.

Examples of markings include:

YAR205-2F

GRAE25-NPP-B

GE25-KRR-B

UC205

205-NPP-B

1726205-2RS1

ES205

YET205

YEL205.

Even when the serial number is partially erased, a few letters may be enough to identify the mounting system.

Measuring the inner diameter

Measure the diameter of the shaft with a caliper.

The most common metric dimensions in this category are:

20 mm

25 mm

30 mm

35 mm

40 mm

45 mm

50 mm

55 mm

60 mm.

Measuring the outer diameter

The D designation is used to confirm the bearing size.

For example:

20 mm bore → outer diameter typically 47 mm

25 mm → 52 mm

30 mm → 62 mm

35 mm → 72 mm

40 mm → 80 mm

45 mm → 85 mm

50 mm → 90 mm.

However, these dimensions alone are not sufficient to distinguish between a YAR, a GRAE, a GE, or an NPP-B bearing.

Measure the widths B and C

This is the most important step.

B generally corresponds to the width of the inner ring or the total width of the bearing.

C corresponds to the width of the outer ring.

Two part numbers may have the same dimensions d × D but different values for B and C.

This is one of the reasons why a UC205 should not automatically be considered identical to all YAR205 variants.

Identify the locking system

Next, take a look at how the bearing is secured to the shaft.

Two screws → YAR, GYE, or UC

Compact, unconventional necklace → GRAE / YET

Eccentric necklace with a wide inner ring → GE / YEL

No device → NPP-B series / 17262.

What does a spherical outer ring mean ?

The outer surface of the bearing is not cylindrical; it forms a portion of a sphere.

This geometry operates within a corresponding spherical range of the housing.

This allows the bearing to rotate slightly to compensate for static misalignment.

This does not mean that the bearing is designed to operate with a severely misaligned or bent shaft.

Agricultural Applications of Bearings

Insert bearings are used in a wide variety of machines:

– conveyors ;

– coarse-threaded screws ;

– elevators ;

– balers ;

– combine harvesters ;

– forage harvesters ;

– haymaking equipment ;

– mixers ;

– spreaders ;

– grinders ;

– fans ;

– intermediate shafts ;

– grape-harvesting machines ;

– material-handling equipment.

Manufacturers of agricultural bearings list insert bearings as one of the common solutions for seeders, tillage equipment, harvesters, forage harvesters, and balers.

Sealing Agricultural Bearings

The type of seal is particularly important when a bearing is operating nearby:

of the earth ;

dust ;

straw ;

mud ;

water ;

plant residues.

Manufacturers offer a variety of sealing technologies, ranging from standard seals to triple-lip seals and reinforced agricultural systems.

NTN-SNR offers a range of seals, including standard seals, L3 triple-lip seals, L4 labyrinth seals, and reinforced AGR seals for highly contaminated environments.

However, increased protection increases friction and may reduce the permissible speed.

Relubrication and Maintenance

Some bearings can be relubricated, while others are designed to operate with their original grease.

Before injecting grease into a housing, check the following:

– that the bearing has the appropriate grease fittings ;

– that the holes in the bearing are correctly aligned with the housing ;

– that the grease used is compatible ;

– that the amount injected is not excessive.

Over-lubrication can cause the temperature to rise and damage the seals.

Comparisons Between Major Brands

The wide variety of part numbers is one of the main challenges when replacing a bearing.

Fastening with set screws

SKF: YAR

INA / FAG: GYE

SNR: UC

NTN: UC

NSK: UC

Compact, Eccentric Necklace

SKF: YET

INA / FAG: GRAE

SNR: ES

NTN: AEL

Wide, Eccentric Necklace

SKF: YEL

INA / FAG: GE

SNR: EX

NTN: UEL

Without a built-in lock

SKF: 17262…

INA / FAG: 20..-NPP-B

former FAG: 762…

SNR: 62..SEE

NSK: 17262…

The main family connections are confirmed in the agricultural correspondence tables.

However, you should always compare the dimensions and suffixes before substituting.

Frequently Asked Questions About Bearings

What is the difference between YAR and UC ?

Both use a set screw clamping mechanism and belong to the same broad functional family, but some secondary dimensions may differ.

Therefore, they should not be automatically considered strictly interchangeable.

What is the difference between YAR and GRAE ?

The YAR uses two needle valves.

The GRAE uses an eccentric locking collar.

Their shaft-mounting system is therefore completely different.

What is the difference between GRAE and GE ?

Both use an eccentric collar.

The GRAE has a relatively compact design.

The GE has a much wider inner ring that extends on both sides.

What is the difference between GE and YEL ?

GE is the standard INA/FAG designation for this family.

YEL is the corresponding SKF designation.

Secondary dimensions must be checked before confirming equivalence.

What is the difference between GRAE and YET ?

GRAE is the INA/FAG family.

YET is the corresponding SKF family of compact eccentric clamps.

Is a 205-NPP-B a standard 6205 bearing ?

No.

They share the same nominal dimensions of 25 × 52 × 15 mm, but the 205-NPP-B has a spherical outer ring designed to operate in a specially adapted housing.

How do I choose between the YAR205, GRAE25, and GE25 ?

All three have a bore of 25 mm and an outside diameter of 52 mm, but their mounting systems and widths differ.

YAR205: two set screws

GRAE25: Eccentric Ring, Short Design

GE25: Eccentric bushing, wide design.

We must therefore identify the design of the original bearing.

Is it possible to replace just the bearing in a complete bearing assembly ?

Yes, as long as the property is still in good condition.

However, it is essential to install exactly the right insert family and to check the spherical profile, the dimensions, the clamping system, and the lubrication holes.

Are these bearings suitable for agricultural machinery ?

Yes. Insert bearings are very common in conveyors, harvesting equipment, balers, haymaking equipment, augers, spreaders, and other agricultural machinery.

Order your bearings from Camagris

Camagris currently offers32 bearings, including the YAR, GRAE, GE, NPP-B, and UC series. Several YAR models are available within 24 hours, while the new agricultural lines are offered with short lead times, depending on inventory.

To identify the correct bearing, check the following first:

– the engraved reference number ;

– the inner diameter ;

– the outer diameter ;

– the width of the outer ring ;

– the total width ;

– the type of fastener ;

– waterproofing ;

– the presence of grease fittings.

If in doubt, please provide the part number listed on your old bearing or its full dimensions to avoid ordering the wrong series.