PALIER DE ROULEAU EMOTTEUR 35MM POUR LEMKEN

RJ35 bearing for a clod-breaking roller, 35 × 118 × 39.9 mm, for Lemken – Ref. CAM199759

The CAM199759 clod-breaking roller bearing, such as RJ35, is a cast-iron roller unit designed for compatible installation on tillage equipment Lemken. Its main dimensions are 35 × 118 × 39.9 mm, with a 35-mm bore and a 92-mm mounting center-to-center distance.

Mounted at the end of the roller shaft, this bearing supports, guides, and allows the assembly to rotate. It must withstand the vibrations, impacts, and forces generated when the roller breaks up clods, compacts the soil, and controls the working depth.

The bearing has a C3 internal game, which is greater than the standard clearance. It also features sealing on both sides via lip seals covered by a protective plate. Grooves are provided on the outer ring and in the bearing housing for mounting retaining elements and protective covers.

Technical Specifications

RJ35 bearing with a 35 mm bore

The Designation RJ35 allows you to identify the type of bearing and its 35-mm inner diameter. This dimension must match the diameter of the roller shaft.

The main dimensions to check are:

• bore: 35 mm ; ;
• Length L: 118 mm ; ;
• Overall dimensions: 39.9 mm ; ;
• Mounting center-to-center distance J: 92 mm ; ;
• Width A: 30.5 mm ; ;
• A1 size: 12.5 mm ; ;
• Nth dimension: 14 mm.

A mere visual resemblance does not guarantee compatibility. The dimensions, grooves, and positioning of the fasteners must match those of the original assembly.

Function of the Bearing on the Clod-Breaking Roller

The rear roller rotates when it comes into contact with the ground as the machine moves forward. The bearings at either end support its shaft and allow it to rotate.

CAM199759 helps:

• maintain the 35-mm axis ;
• guide the rotation of the roller ;
• reduce friction ;
• support radial loads ;
• absorb some of the axial forces ;
• maintain alignment ;
• transfer the loads to the support ;
• protect the bearing from contaminants ;
• reduce operational clearance ;
• Maintain a steady pace across the entire width.

A seized or severely worn bearing can prevent the roller from rotating normally and cause sliding wear.

Role of the clod-breaking roller

The crumbler roller is used to complete the work done by the tines, coulters, or discs. Depending on its design, it helps to:

• break up the clumps ;
• level the surface ;
• pack down the soil ;
• check the depth ;
• stabilize the tool ;
• prepare the seedbed ;
• partially cover the ground ;
• reduce irregularities ;
• improve the finish ;
• minimize surface moisture loss.

The bearings must operate freely so that the roller follows the contours of the field smoothly.

Cast iron bearing unit

The body of the CAM199759 is made of cast iron. This material provides good rigidity and helps keep the bearing in a stable position.

A fully cast-iron unit makes it easier to:

• attachment to the mount ;
• maintaining the rotation ;
• load transfer ;
• alignment with the axis ;
• replacing the entire unit ;
• protection of internal components.

The housing must be inspected after an impact. Even a fine crack can grow due to vibrations. It is not recommended to continue using a bearing whose cast-iron housing is broken or deformed.

Dimensions: 35 × 118 × 39.9 mm

The complete dimensional designation for the bearing is 35 × 118 × 39.9 mm.

These values allow you to control:

• the diameter of the shaft ;
• the length or size of the dwelling ;
• the overall width of the landing ;
• the space available between adjacent elements ;
• the positioning of the covers ;
• roller alignment.

It is recommended that you measure the old bearing after cleaning it, using a sufficiently accurate vernier caliper.

92 mm mounting center-to-center distance

The dimension J, 92 mm corresponds to the specified center-to-center distance between the mounting points.

To verify this rating:

1. Clean the holes in the bearing.
2. Find their center.
3. Measure the distance from center to center.
4. Compare the value you obtained to 92 mm.
5. Also check the diameter of the bores.

An incorrect center-to-center distance prevents the bearing from being positioned correctly. It is not recommended to enlarge the holes or modify the mounting bracket to accommodate a different part.

N dimension of 14 mm

The rating 14 mm diameter matches the specified dimension for the bores or the mounting area defined on the bearing drawing.

This value must be checked using:

• the diameter of the fasteners ;
• the holes in the bracket ;
• the washers ;
• the nuts ;
• the locking system ;
• the condition of the bores.

You should not select screws based solely on the N dimension without checking the original assembly and the required strength class.

Dimensions A and A1

The additional dimensions are:

• A: 30.5 mm ; ;
• A1: 12.5 mm.

These dimensions describe the geometry of the part and the position of the bearing or contact surfaces. They allow you to compare the overall dimensions of the new bearing with those of the removed part.

C3 Internal Game

The built-in bearing has a Internal radial clearance C3, higher than in a normal game.

This game takes into account variations that may occur during operation due to:

• the tightness of the bolt on the shaft ;
• adjustments to the living situation ;
• the rise in temperature ;
• repeated loads ;
• component expansion ;
• vibrations ;
• of the rotational speed.

C3 clearance is an internal characteristic of the bearing. It does not mean that the roller should have significant movement once the bearing is installed.

If the roller moves noticeably in its housing, check the shaft, the bearing, the fasteners, and the housing.

Dynamic load of 27,500 N

The stated dynamic load capacity is 27,500 N. It characterizes the bearing's ability to support a load during rotation under standardized design conditions.

The actual duration also depends on:

• the roller speed ;
• the nature of the expenses ;
• impacts ;
• alignment ;
• waterproofing ;
• contamination ;
• temperature ;
• the condition of the shaft ;
• the number of hours of use.

This value does not directly correspond to the maximum load that the entire set of farm equipment can handle.

Static load of 15,300 N

The stated static load is 15,300 N. It indicates the bearing's capacity to support a load under low-speed or stationary conditions, depending on the calculation method used.

Static charges may occur:

• when the machine is resting on the roller ;
• during storage ;
• when it hits a rock ;
• during certain maneuvers ;
• during transport ;
• when the tool is secured in the ground.

The overall strength of the assembly also depends on the cast-iron body, the shaft, the fasteners, and the mounting bracket.

Double-sided sealant

The bearing is equipped with lip seals on both sides, protected by plates.

This seal helps prevent the entry of:

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

It also helps keep the lubricant inside the bearing.

The bearing operates very close to the ground. Therefore, the condition of the seals has a significant impact on its service life.

Protective plates

The shields mounted on the bearing faces complement the action of the lip seals. They provide additional protection against direct splashes and small foreign particles.

However, they do not make the bearing completely watertight against:

• a pressure washer ;
• prolonged immersion ;
• a coil of string ;
• missing exterior protection ;
• a direct collision ;
• a highly abrasive mixture of soil and water.

It is not recommended to direct the jet from a pressure washer directly at the seal.

Groove on the outer ring

The outer ring of the bearing has a groove. This groove helps secure or position the bearing within the cast-iron housing.

If the inner bearing needs to be replaced separately, be sure to keep:

• the same diameter ;
• the same external dimensions ;
• the C3 game ;
• the same groove ;
• the same type of seal ;
• the same load capacity ;
• the same ring geometry.

A standard bearing with the same bore diameter may not necessarily be suitable.

Groove for protective covers

The body has a groove that allows for the installation of protective covers. These components limit the bearing's exposure to debris and tangles.

Hoods can help protect against:

• the earth ;
• pebbles ;
• mud ;
• the strings ;
• crop residues ;
• minor impacts ;
• the projections caused by the moving parts.

When replacing the part, make sure that the original protective covers can be reinstalled and that they are not bent.

Application on hardware Lemken

CAM199759 is designed for the clod-breaking roller of a piece of equipment Lemken compatible. Since a specific list of models is not provided, the selection must be based on the dimensions and the installation method.

Before placing your order, please note the following:

• the complete model of the machine ;
• its serial number ;
• the type of roller ;
• the part number of the old bearing ;
• the 35-mm bore ;
• a center-to-center distance of 92 mm ;
• dimensions: 35 × 118 × 39.9 mm ;
• body shape ;
• the position of the guards.

Different rollers can be offered on the same machine Lemken.

A heavily used part

During operation, the bearing is exposed to:

• continuous vibrations ;
• impacts ;
• radial forces ;
• lateral loads ;
• dust ;
• mud ;
• corrosion ;
• temperature fluctuations ;
• gear changes ;
• the weight of the roller ;
• soil reactions.

The constraints are particularly significant in dry, compacted, or stony soil.

Symptoms of a Faulty Bearing

Replacement may be necessary if you notice:

• play in the roller ;
• a rumbling ;
• a snap ;
• a squeak ;
• a difficult rotation ;
• a hard spot ;
• a warm-up ;
• a grease leak ;
• damaged seals ;
• a cracked cast-iron body ;
• loose fasteners ;
• a misaligned roller ;
• vibrations ;
• a ring that rotates on the axis ;
• damaged hoods.

It may be easier to identify a noise when the roller is lifted and turned by hand, after securing the machine.

Consequences of a Seized Bearing

A seized bearing prevents the roller from turning normally. As a result, the roller may slide across the floor instead of rolling.

This can cause:

• an increase in the pulling force ;
• roller wear ;
• a pile of dirt ;
• poor leveling ;
• an uneven depth ;
• damage to the shaft ;
• a break in the support ;
• overload on the opposite bearing ;
• vibrations in the chassis.

It is recommended that you shut down the machine as soon as you notice any unusual noise or excessive heat.

Common Causes of Wear and Tear

Deterioration can be caused by:

• dust ingress ;
• water seepage ;
• damaged gaskets ;
• a lack of protection ;
• misalignment ;
• a worn axle ;
• loose screws ;
• an overload ;
• a shock ;
• high-pressure cleaning ;
• insufficient lubrication ;
• an unsuitable grease ;
• prolonged exposure to the outdoors ;
• internal corrosion ;
• a part with incorrect dimensions.

The cause must be identified before installing the new bearing.

Things to Check Before Ordering

Before ordering part number CAM199759, please check:

• the designation RJ35 ;
• the 35-mm bore ;
• length L of 118 mm ;
• the overall dimension of 39.9 mm ;
• dimension A of 30.5 mm ;
• dimension A1 of 12.5 mm ;
• a J-center-to-center distance of 92 mm ;
• the N dimension of 14 mm ;
• the cast-iron body ;
• the grooves ;
• the hoods ;
• the C3 game ;
• the position on the roller ;
• the part number of the old bearing.

A photograph and a complete set of measurements make it easier to compare them.

Axis Control

The flange must have a diameter that matches the 35-mm bore.

Check:

• the diameter at several points ;
• ovalization ;
• stripes ;
• corrosion ;
• deformation ;
• rotation marks ;
• the condition of the shoulder ;
• threads or fasteners ;
• alignment.

A new bearing mounted on a worn shaft will retain some play and may wear out quickly.

Media Check

The surface on which the cast-iron body is placed must be:

• plane ;
• clean ;
• uncracked ;
• properly aligned ;
• without oval-shaped holes ;
• without distortion ;
• free of compacted soil ;
• Compatible with a 92 mm center-to-center distance.

A misalignment between the two ends of the roller can place a constant load on the bearings.

Disassembly Tips

Before the procedure:

1. Place the equipment on a stable surface.
2. Lower the tool all the way down.
3. Turn off the tractor's engine.
4. Remove the key.
5. Install mechanical supports.
6. Lock the roller in place.
7. Clean the area.
8. Determine the direction of the bearing.
9. Remove the covers.
10. Support the axis.
11. Gradually loosen the fasteners.
12. Remove the bearing.
13. Check the shaft and the mount.

The roll may be heavy. It must be supported using a suitable lifting device.

Installation Tips

To install CAM199759:

1. Compare the new bearing with the old one.
2. Check the RJ35 designation.
3. Check the dimensions: 35 × 118 × 39.9 mm.
4. Check the 92-mm center-to-center distance.
5. Clean the shaft.
6. Check the mounting surface.
7. Position the bearing without using excessive force.
8. Snap the fasteners into place by hand.
9. Align both sides of the roll.
10. Tighten gradually.
11. Follow the recommended torque.
12. Replace the protective covers.
13. Turn the roller by hand.
14. Check for any hard spots.
15. Check the play.
16. Conduct another inspection after the first few hours.

The bearing must not be used to force a misaligned shaft or support back into alignment.

Lubrication

The maintenance method depends on the bearing design. If the unit has a grease fitting:

• Clean it before adding grease ;
• Use a compatible product ;
• Follow the scheduled frequency ;
• Avoid applying excessive pressure ;
• Check the seals ;
• Remove the excess.

If the bearing is lubricated for its entire service life, do not modify it to add a lubrication point.

Inspection After Restart

After assembly:

• turn the roller ;
• Listen to the rumbling ;
• Check the alignment ;
• Make a first pass at a reduced speed ;
• Check the preheating ;
• Look for vibrations ;
• Check the fasteners ;
• Check the protective covers ;
• Check again in a few hours.

If the equipment overheats, shut it down and check the installation.

RJ35 Connector Lemken available at Camagris

The CAM199759 RJ35-type bearing is a cast-iron unit designed for a clod-breaking roller Lemken Compatible. It has a 35-mm bore, dimensions of 35 × 118 × 39.9 mm, and a mounting center distance of 92 mm.

Camagris offers bearings, bushings, shafts, and parts for rollers on agricultural equipment. We ship our new parts quickly throughout France and all of Europe.