Swing Bearing For Excavator

Having a quality swing bearing for excavator is essential to keep your excavator functioning properly. It also helps prevent damage to your excavator, especially when it comes to removing heavy equipment, such as concrete slabs or foundations.

Detecting slewing bearing failures early

Detecting slewing bearing failures early for excavators can be critical to the operation and productivity of the machine. Early detection can prevent catastrophic failure, reducing unnecessary maintenance and avoiding unexpected accidents.

The slewing bearing is subject to heavy load, continuous moment of rolling elements, and natural wear. The inner race was damaged, resulting in the failure. Large-scale pitting and abrasion took place in the outer race. In addition, the gear teeth were damaged in the early fault stage.

A mathematical model was developed, based on measured quantities of the state of the excavators in operation. It defines the moments of the bearing loads, the pressures of the hydrostatic system in the actuator ducts, and the kinematic chain.

Data collection was carried out under three conditions: normal working, early fault, and severe fault. The vibration signals were collected at 512 Hz. During the normal working stage, the slewing bearing was under regular lubrication. The speed of the inner race was 1.5 rpm.

Preventing slewing bearing failures

During the operation of excavators, it is necessary to monitor the performance of slewing bearing. If any failures occur, it is necessary to perform repairs in time. However, it is not always necessary to buy new parts, especially when the problem can be rectified by simple preventative measures.

One of the best ways to ensure that the slewing bearing is properly maintained is to check its lubrication. If the lubricant is in good condition, it will reduce the friction and help the bearing to perform its job effectively. It is also possible to check the condition of the bearing by looking for metal chips in the lubricant. If any metal chips are present, it is a sign that significant wear is taking place.

In addition, checking the torque of the bolts can also help to prolong the life of the slewing bearing. The torque should be checked after 100 hours of work and also after 500 hours of work. Ideally, all bolts should have the same pre-tightening torque.

DT series bearings provide exceptional moment, thrust, and radial load capacities

DT series swing bearings from Kaydon offer exceptional moment, thrust, and radial load capacities for excavators. These bearings are also suitable for critical pitch applications and yaw applications. They are manufactured from engineering polymers and screw machine parts. They have been designed to provide excellent repeatability, and high functional security adjustment.

The DT series features an eight-point ball bearing, which provides maximum capacity and performance. The design is smaller than a three-row roller design, which provides up to 80% capacity increase over a single row four-point design.

The DT series offers a unique internal configuration that includes two deep groove gothic arch raceways. These raceways feature a modified line contact, which ensures optimum stress distribution. This design also allows bearings to tolerate certain angular misalignments. The modified line contact prevents stress increases at the edges of the bearing.

The DT series is designed to meet the most demanding requirements of the industry, and is ideal for applications where maximum load capacity is required. Kaydon engineers apply their extensive experience to solve unique bearing challenges.

Signs of a failing slewing bearing

Identifying the signs of a failing swing bearing for excavators is important. It can result in catastrophic failure if left unchecked. However, with the right knowledge and care, the heavy-duty construction equipment can last for decades. Keeping up with the maintenance schedule can prevent premature failure.

A slewing ring bearing, or swing bearing, is one of the most important components of a construction machine. It must be lubricated regularly to ensure its proper function. However, wear and tear will eventually occur in even the most well-maintained components.

If a slewing bearing is not lubricated properly, it may make grinding noises. These sounds indicate that the bearing's raceways are worn out. This can cause radial play or lateral play. The noise will increase in pitch as the bearing wears.

Another common sign of a failing swing bearing for excavators involves cracking. This may happen in the advanced stages of wear. Usually, it is a sign of internal damage. However, it can also be caused by high-friction metal-to-metal contact.