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"Trailer Bearing"

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73 series
2014-05-17

CA series
2014-04-30

Four Row
2014-04-25

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"Trailer Bearing"

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Although cranes with single ball race slew bearings are considered to be most at risk
2015-11-02
Although cranes with single ball race slew bearings are considered to be most at risk, rocking tests on all deck crane bearing,where recommended by the crane manufacturer, must be carried out and the results must be recorded.Lloyd’s Register surveyors are being instructed to review the results of rocking tests at all future Annual Thorough Survey... Although cranes with single ball race slew bearings are considered to be most at risk, rocking tests on all deck crane bearing,where recommended by the crane manufacturer, must be carried out and the results must be recorded.Lloyd’s Register surveyors are being instructed to review the results of rocking tests at all future Annual Thorough Surveys.If no rocking test has been carried out in the previous six months, the crane in question will not be certified for further use.It will also be recommended that the crane is taken out of service and the Lifting Appliance Register will be endorsed accordingly.Measuring proceadures for wear in slewing bearings for rope luffing cranes.The slewing bearing is an essential part of the crane and must be well maintained.Over the years the slewing bearing will have some wear, and to be able to know if there is a need for changing the slewing bearing it is needed to keep a record of the wear.The measurements should be taken reqularly, every 6 months.Measurements can be sent to the Maker for evaluation.Note When measurements are to be taken the ship shall have as little list/trim as possible.Attached you may find proceadures for Cranes Rocking test service information. View Details
Installation and adjustment with high speed bearings
2015-10-12
When the co-ordination and high speed bearing clearance due to the rapid bearing both precision bearings according to requirements, but also according to the requirements of high temperature bearings, so consider the mating and clearance, to take into account the following two points: (1) when the temperature rose high temperature the size of the c... When the co-ordination and high speed bearing clearance due to the rapid bearing both precision bearings according to requirements, but also according to the requirements of high temperature bearings, so consider the mating and clearance, to take into account the following two points: (1) when the temperature rose high temperature the size of the change and hardness change; force system changes (2) high speed and centrifugal force caused by the change in shape.In short, at high speed, high temperature conditions, with and clearance from the choice you want to strive to high precision bearings and performance of the bearing, which is difficult.In order to ensure the installation of roller bearing deformation is small, KOYO 7319AC angular contact ball bearing an excessive amount of interference interference fit can not get too big, and the thermal expansion under high temperature and high centrifugal force and under, or offset the mating surfaces of lawTo pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully in consideration of the above two factors under the premise of constant speed at room temperature under an effective amount of interference for high-speed bearings may be invalid. View Details
Principles of bearing packaging method of requirements:
2015-07-20
① miniature bearings: every 10 to 15 sets of linear plain bearings into a plastic tube, every 5 to 10 plastic tube put into a box (or bag, wrapping).② medium and small bearings:- In multi-volume sets of bearings with polyethylene film bag, topical kraft paper or polyethylene compound;- Multiple sets of bearing into a plastic tube (box);- A sing... ① miniature bearings: every 10 to 15 sets of linear plain bearings into a plastic tube, every 5 to 10 plastic tube put into a box (or bag, wrapping).② medium and small bearings:- In multi-volume sets of bearings with polyethylene film bag, topical kraft paper or polyethylene compound;- Multiple sets of bearing into a plastic tube (box);- A single set of bearings with polyethylene film bag, seal the bag and then into the fold, or a tray.③ large bearings:- When using polyethylene film or polyethylene composite paper packaging single set, and then into a carton;- Polyethylene film bag, a single set of packaged folding pocket, and then into a carton;- Single suit into a special plastic box;- A single set of three-wrapped package: inner polyethylene film strip or composite tape, middle fastening tape, waterproof outer layer permeable plastic tape.④ large bearings:- A single set of three-wrapped packaging (ibid.);- Take four single wrapped package: After the above three-wrapped package, the outermost layer and then wrapped with linen.≥150mm separable outer diameter tapered roller mobile crane bearing in the front of packaging, should liner polyethylene film before outside the component, or the inner and outer components separately packaged. View Details
The use of trailer bearing
2015-06-25
Bearing use and coordinationUse the matters needing attentionRolling bearings make precision parts, and therefore requested the use of the corresponding support cautious attitude, not only changing trailer bearings high performance, if used improperly, can not achieve the expected performance, so, use of the bearing that should pay attention to the... Bearing use and coordinationUse the matters needing attentionRolling bearings make precision parts, and therefore requested the use of the corresponding support cautious attitude, not only changing trailer bearings high performance, if used improperly, can not achieve the expected performance, so, use of the bearing that should pay attention to the following items:Keep the bearings and radial bearing the surrounding environment clean. Even the eyes can not see the smile dirt into the bearing, also increase the bearing wear, vibration and noise.Use the installation carefully, do not allow powerful punch, does not allow direct percussion bearing with a hammer, not allowed to pass through the rolling pressure.Use tools appropriate, accurate, as far as possible the use of special tools, the use of fabric and fiber or something to avoid.To prevent corrosion of bearings, the direct use of hands to take bearings, should wash hands sweat, and coated with high quality slewing bearing mineral oil before operation, during the rainy season and summer with particular attention to anti rust.Bearings withCoordination selectionInner diameter and outer diameter of rolling bearings are manufactured according to the standard tolerance, bearing inner ring and shaft, tolerance of outer ring and the seat hole degree can only through tolerance and seat hole control shaft neck to achieve. With the bearing inner ring and shaft using the basic hole system, combined with the outer ring of the bearing seat hole of the shaft.The correct choice of cooperation, must know the actual load conditions of bearing, the working temperature and other requirements, but in fact it thin wall bearings is very difficult. Therefore, in most cases it is used according to the selection of fine grinding.The size of loadThe ring and the shaft or housing between the win depends on the size of the load, heavy load by win larger, lighter load by winning the smaller amount. View Details
rolling bearing
2015-06-03
The bearing arrangement includes not only the rolling bearing, but also with the bearing components related, such as the shaft and the bearing seat. A very important part of the lubricant is also bearing configuration, as lubricants to corrosion abrasion proof, so that the bearing can give full play to the role of. In addition, the seal is Excavato... The bearing arrangement includes not only the rolling bearing, but also with the bearing components related, such as the shaft and the bearing seat. A very important part of the lubricant is also bearing configuration, as lubricants to corrosion abrasion proof, so that the bearing can give full play to the role of. In addition, the seal is Excavator Slewing Bearing also a very important component, the seal performance is very important for lubricant clean, keep clean the bearing service life have a profound impact.In order to design of rolling bearing configuration, need– select the suitable bearing type andDetermine the appropriate size of the - bearing,But this is not enough. There are several other aspects to consider:- such as the other parts of the trailer bearings arrangement proper form and design,- correct fit and bearing internal clearance or preload,- fixed device,Seal - proper,The type and dosage, lubricant, and- installation and removal methods.Each individual will affect the performance, reliability and economy of the bearing arrangement.Work required depends on whether thin wall bearings similar bearing matching experienced. In case of lack of experience, there are special requirements, or the need for bearing configuration cost and any other subsequent appearance to give special consideration, we need to do more work, such as a more accurate calculation or test.Selection and application of bearing. View Details
trailer bearing tip
2015-04-13
It is a metal sliding friction produced quite sharp scream, though trailer bearing temperature rise is not high, it will not have much impact on the service life of the bearing and grease life, does not affect the rotation, but not melodious sound disturbing, especially bear radial load of large cylindrical roller bearings often have this noise, th... It is a metal sliding friction produced quite sharp scream, though trailer bearing temperature rise is not high, it will not have much impact on the service life of the bearing and grease life, does not affect the rotation, but not melodious sound disturbing, especially bear radial load of large cylindrical roller bearings often have this noise, the characteristics of:A. bearing radial clearance large easy to produce.B. usually occurs in grease lubrication, oil lubrication is rare.C. decreases with the bearing size increases, and often appears in a certain speed range.D. winter often.E. its appearance is irregular, and unpredictable, and associated with the installation of operating conditions and performance, filling grease amount. This noise can be used to reduce the bearing radial clearance and the shallow outer ring raceway structure to prevent.Influence of bearing structure on the vibration and noise. View Details