ROULEMENT 6210 DE ROTOR 50X90X20 POUR LEMKEN

6210 rotor bearing, 50 × 90 × 20 mm, for equipment Lemken – Ref. CAM99769

The CAM99769 rotor bearing is a rigid ball bearing of the 6210, designed for installation on various types of agricultural equipment Lemken. Its standard dimensions are 50 × 90 × 20 mm, with a bore of 50 mm, an outside diameter of 90 mm, and a width of 20 mm.

This bearing has a C3 internal game, which is greater than normal play, as well as a rubber seal that makes contact on both sides. Its cage is made of steel. This design helps protect the balls and raceways from dirt, dust, and debris encountered in an agricultural rotor.

The 6210 CAM99769 bearing is designed to support a rotating shaft. In particular, it can be used on a rotor, a roller, or another rotating component that has exactly the same dimensions and technical specifications.

Technical Specifications

Before placing an order, you should check the dimensions, the C3 internal clearance, and the seal type of the disassembled bearing.

Dimensions: 50 × 90 × 20 mm

The three values listed correspond to the bearing's main dimensions:

• 50 mm : inner diameter or bore ;
• 90 mm : outer diameter ;
• 20 mm : total width.

The inner diameter must match the shaft’s diameter. The outer diameter must fit properly into the rotor housing, while the width determines its position between the shoulders, spacers, or retaining devices.

Even if another bearing has the same inner diameter, it cannot replace the 6210 if its outer diameter or width differs.

Single-row deep-groove ball bearing

The CAM99769 is a single-row deep-groove ball bearing. This family is widely used to guide the rotating shafts of agricultural machinery.

Its design allows it to handle:

• radial loads ;
• moderate axial forces ;
• rotation speeds appropriate for the installation ;
• changes in diet ;
• vibrations ;
• repeated requests ;
• the forces transmitted by the rotor shaft.

The balls roll along grooves machined into the inner and outer rings. Proper lubrication minimizes friction and heat buildup.

Application on a rotor Lemken

The 6210 CAM99769 bearing is designed for installation in a compatible rotor on equipment Lemken.

Depending on the machine, the rotor can be used in:

• soil preparation ;
• fragmentation ;
• leveling ;
• re-compaction ;
• the function of a roller ;
• the drive of a rotating component ;
• shaft guidance ;
• the transmission of motion.

The detailed list of machines Lemken Since a list of compatible parts is not provided, the part number of the old bearing and its dimensions must be noted before placing an order.

Function of the Rotor Bearing

The bearing keeps the shaft aligned while allowing it to rotate with minimal friction. It helps maintain the rotor's alignment and transfers loads to the housing or frame.

Its main functions are:

• guide the tree ;
• keep the rotor in place ;
• reduce friction ;
• support radial loads ;
• absorb certain axial forces ;
• reduce the play ;
• maintain a regular rotation ;
• reduce vibrations ;
• protect adjacent components ;
• adapt to changes in speed.

A defective bearing can cause misalignment and accelerate wear on the shaft, housing, or drive components.

C3 Internal Game

The CAM99769 bearing has a C3 internal game. This means that its internal radial clearance is greater than that of a standard bearing.

This feature is designed for applications where play may increase after installation or during operation, particularly as a result of:

• the tightness on the shaft ;
• adjustments to the living situation ;
• the rise in temperature ;
• the expansion of the rings ;
• expenses ;
• speed ;
• temperature fluctuations.

The C3 clearance does not mean that the rotor should have significant clearance once assembled. It refers to an internal characteristic of the bearing before or during installation under standard conditions.

Importance of C3 Clearance on an Agricultural Rotor

A rotor can operate for long periods in a dusty environment and under varying loads. As a result, the bearing temperature may rise.

If the internal clearance becomes insufficient during operation, this can cause:

• an increase in friction ;
• a warm-up ;
• degradation of fat ;
• wear on the tracks ;
• a difficult rotation ;
• seizure.

It is not recommended to automatically replace a C3 bearing with a standard-clearance model, even if the dimensions are identical.

Rubber seal on both sides

The bearing has a Double-sided rubber seal. Seals protect internal components from the external environment.

This seal helps limit the entry of:

• dust ;
• of earth ;
• of sand ;
• mud ;
• moisture ;
• plant residues ;
• abrasive particles.

It also helps keep the lubricant inside the bearing.

On a tilling machine, a double-sided seal is particularly useful because the bearing often operates in close proximity to the soil and flying debris.

Limits of Waterproofing

A sealed bearing is not designed to withstand all types of damage indefinitely. Its service life may be reduced by:

• a high-pressure jet directed at the seal ;
• prolonged immersion ;
• the string wound around the shaft ;
• a missing hood ;
• a deformed guard ;
• a pile of damp soil ;
• an impact on the ring ;
• excessive temperature.

When cleaning, avoid pointing the spray nozzle directly at the sealing lips.

Steel cage

The steel cage keeps the balls evenly spaced around the bearing. It guides their movement and limits contact between them.

She is involved in:

• the distribution of the marbles ;
• rotational stability ;
• maintaining spacing ;
• reducing internal friction ;
• the mechanical integrity of the assembly.

A damaged cage can cause noise, jamming, or irregular movement of the balls.

Weight: 0.475 kg

The listed weight of the bearing is 0.475 kg. This information helps confirm the item's identity and verify that the received item is correct.

Weight alone does not guarantee compatibility. Dimensions, sealing, and internal clearance remain the key characteristics to compare.

Conditions Encountered on Farm Equipment

The rotor bearing operates under harsh conditions:

• abrasive dust ;
• mud ;
• humidity ;
• vibrations ;
• shocks ;
• load variations ;
• gear changes ;
• extended fixed assets ;
• temperature fluctuations ;
• lateral forces ;
• stresses generated by the soil.

Even a small amount of dirt that gets into the bearing can contaminate the grease and damage the raceways.

Symptoms of a Worn Bearing

A rotor bearing should be inspected if you notice:

• a rumbling ;
• a snap ;
• a squeak ;
• irregular rotation ;
• a hard spot ;
• a warm-up ;
• play in the tree ;
• vibrations ;
• a grease leak ;
• a damaged seal ;
• a ring rotating on the shaft ;
• rotation of the outer ring within the housing ;
• metal filings ;
• a misaligned rotor ;
• an abnormal increase in training intensity.

A noise may occur only at a certain speed or when the rotor is under load.

Consequences of a Defective Bearing

Continuing to operate with a damaged bearing can cause damage to:

• the rotor shaft ;
• housing ;
• the medium ;
• the seals ;
• spacers ;
• gears ;
• belts or chains ;
• the fasteners ;
• the rotor ;
• the other bearings in the assembly.

A seized bearing can cause rapid wear on the shaft and bring the machine to a complete standstill.

Common Causes of Deterioration

The malfunction may be caused by:

• contamination ;
• water seepage ;
• an incorrect reference ;
• a bearing with improper internal clearance ;
• a misalignment ;
• a worn-out tree ;
• a warped housing ;
• incorrect force assembly ;
• blows delivered directly to the rings ;
• excessive preload ;
• incorrect axial play ;
• a high temperature ;
• an impact on the rotor ;
• a missing safeguard ;
• an overload ;
• high-pressure cleaning.

Before installing the new part, you must determine the cause of the damage to the old bearing.

Things to Check Before Ordering

Before ordering the CAM99769, please check:

• the designation 6210 ;
• an inner diameter of 50 mm ;
• an outer diameter of 90 mm ;
• 20 mm wide ;
• the C3 internal game ;
• double-sided sealing ;
• the steel cage ;
• the part number marked on the old bearing ;
• the shaft diameter ;
• housing ;
• the shoulders ;
• spacers ;
• retention devices ;
• the model and serial number of the machine.

A 6210 bearing that is open or protected on only one side does not offer the same protection as this double-sealed version.

Shaft Inspection

Before installation, measure the shaft's span at several points.

Search for:

• a span of less than 50 mm ;
• ovalization ;
• stripes ;
• corrosion ;
• discoloration caused by heat ;
• a mark indicating the ring's rotation ;
• a damaged shoulder ;
• a deformation ;
• misalignment.

A worn shaft can cause the inner ring to rotate, quickly damaging the new bearing.

Housing Inspection

The diameter of the housing must be compatible with the 90-mm outer ring.

Check:

• the diameter ;
• circularity ;
• the presence of corrosion ;
• traces of rotation ;
• cleanliness ;
• the absence of burrs ;
• the condition of the restraint systems ;
• alignment with the other bearing ;
• the absence of cracks.

An outer ring that has rotated in its housing may have enlarged or damaged the seating surface.

Disassembly Tips

Before the procedure:

1. Park the machine on a stable surface.
2. Lower and secure the tool.
3. Turn off the tractor's engine.
4. Remove the key.
5. Secure the rotor.
6. Remove the protective covers.
7. Identify the order of the spacers.
8. Support the tree.
9. Remove the retaining devices.
10. Remove the bearing using a suitable tool.
11. Clean the shaft and the housing.
12. Check all ranges.

It is not recommended to cut or heat the bearing near seals, pipes, or sensitive components without taking the necessary precautions.

Installation Tips

To install the 6210 CAM99769 bearing:

1. Check the dimensions: 50 × 90 × 20 mm.
2. Compare the part number with that of the old bearing.
3. Check to see if the C3 game is present.
4. Check both gaskets.
5. Clean the shaft and the housing.
6. Remove any burrs.
7. Use a press or a suitable assembly tool.
8. Apply force to the ring in question.
9. Do not transmit force through the rollers.
10. Position the bearing without tilting it.
11. Reinstall the spacers.
12. Install the restraint systems.
13. Check that it rotates freely.
14. Replace the protective covers.
15. Check the installation after the first few hours.

When the bearing is mounted on the shaft, the force must be applied to the inner ring. When it is pressed into a housing, the force must be applied to the outer ring.

Do not strike the bearing directly

Hammer blows transmitted through the balls can create small indentations on the tracks. This damage then causes:

• a noise ;
• vibrations ;
• accelerated wear ;
• a warm-up ;
• a shorter service life.

Use a mounting sleeve, a press, or a tool designed for bearings.

Hot Assembly

When the fit requires it, the inner ring can be installed using heat applied with appropriate induction heating equipment.

Avoid:

• direct flame ;
• overheating ;
• contact with a plate that is too hot ;
• deterioration of the rubber seals ;
• contamination of the bearing.

Since this version is equipped with seals, the operating temperature must remain within the limits specified for the bearing and its lubricant.

Post-installation inspection

After installation:

• Turn the shaft by hand ;
• Check for any hard spots ;
• control the game ;
• look for friction ;
• Start by testing it at a low speed ;
• Listen to how it works ;
• Keep an eye on the temperature ;
• Check the safety guards ;
• Check the fasteners ;
• Conduct another inspection after a few hours.

If the machine overheats, it must be shut down and inspected again.

Maintenance and Cleaning

Since this version is sealed on both sides, the internal lubrication is protected. Do not puncture the seals or modify the bearing to add grease.

To preserve the assembly:

• Keep the protective coverings in place ;
• Avoid using a pressure washer on the joints ;
• control the game ;
• Listen for noises ;
• Keep an eye on the heating ;
• Remove the coiled strings ;
• Clean out any buildup of dirt ;
• Inspect the tree after an impact ;
• Store the machine in a dry place, if possible.

Technical Comparison References

To make it easier to identify parts in catalogs and compare them with the removed bearing, this application can be used in conjunction with the following part numbers:

000239277, 0002392770, 0002440300, 239277, 239277.0, 244030.0, 244030, JD9406, and 3198611.

These references are provided for research and comparison purposes. The dimensions 50 × 90 × 20 mm, the game C3 and the double-sided seal must always be checked before placing an order.

6210 Bearing Available at Camagris

The CAM99769 bearing is a 6210 deep-groove ball bearing measuring 50 × 90 × 20 mm. Its C3 clearance and rubber seals on both sides are suited to the stresses encountered on the rotor of compatible agricultural equipment.

Camagris offers bearings, bushings, shafts, and transmission components for tillage and harvesting equipment. We deliver our new parts quickly throughout France and all of Europe.