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Brief overview of slewing bearings


2023-07-05 14:22:12

What is a slewing bearing?

A slewing bearing is a common mechanical element used to support and rotate a shaft or shaft in a mechanical device. It plays an important role in smooth rotation, reducing friction and supporting load. In the industrial field, slewing bearings are widely used in various equipment and mechanical systems, such as tower cranes, excavators, wind turbines, rotating platforms, etc.

Composition of slewing bearings

Slewing bearings are composed of inner rings, outer rings, rolling elements, cages and seals. The inner ring is an annular part with a small inner diameter, usually fixed to the shaft. The outer ring is a ring-shaped part with a large outer diameter, usually fixed to the base of the mechanical equipment. The rolling elements are balls or rollers that roll between the inner and outer rings, reducing the contact area, thereby reducing friction and energy loss. The function of the cage is to maintain the spacing and distribution of the rolling elements so that they can move smoothly. Seals are used to prevent impurities such as dust and moisture from entering the interior of the bearing to maintain its working life and performance.

The working principle of slewing bearing

Slewing bearings rotate the shaft through rolling elements between the inner and outer rings. When the bearing is loaded, the rolling body forms a rolling motion between the inner ring and the outer ring, thereby bearing and transmitting the load. The design of slewing bearings considers the geometry between the inner ring, outer ring, rolling elements and cage, as well as the selection of materials to provide the best load carrying capacity, smooth rotation and service life.

Slewing bearings have many advantages. First of all, it has high load-bearing capacity and can withstand axial force, radial force and overturning force from different directions. Secondly, the slewing bearing has a low coefficient of friction, providing smooth rotational motion and reducing energy loss. In addition, the slewing bearing also has the characteristics of simple structure, convenient installation and long life, and can operate reliably in various harsh working environments.

Slewing bearings are used in a wide range of applications

In the field of construction and engineering machinery, slewing bearings are widely used in tower cranes, excavators, cranes and other equipment to achieve smooth slewing motion and hoisting of heavy objects. In the field of energy, slewing bearings are used in wind turbines, solar trackers and other equipment to turn wind blades or solar panels to capture maximum energy. In addition, slewing bearings are also used in ships, metallurgical equipment, machine tools and automated production lines.

Precautions for slewing bearings

It should be noted that the performance and life of slewing bearings are closely related to use and maintenance. Proper installation, lubrication and regular inspection are the keys to ensure the normal operation of slewing bearings and prolong their life. During use, if abnormal noise, temperature rise or rolling is not smooth, etc., corresponding measures should be taken in time for inspection and maintenance.

In a word, slewing bearing is an important mechanical component, which is widely used in various equipment and mechanical systems. It realizes the rotation of the shaft through the rolling motion of the rolling elements, and has the advantages of high load capacity, low friction coefficient and long life. Reasonable use and maintenance of slewing bearings can improve the reliability and performance of equipment and ensure the normal operation of mechanical systems.

How to find a trustworthy slewing bearings supplier?

When it comes to choosing slewing bearings suppliers, procurement departments rely on a number of qualitative, quantitative, subjective and objective criteria.

1. Supplier cost

Probably the most obvious – but equally important – factor to take into consideration when looking for new suppliers, is cost.

Of course, you’ll have a figure in mind as you’ll know which products you’re looking for, and how much you’re willing to pay. Even so, prices between suppliers can vary, so it’s important to shop around and see who offers the best deal. For instance, some suppliers may offer discounts on bulk-buying; or others may offset higher costs with better quality products.

You should weigh up all of the options when it comes to costs, before deciding which supplier is best in that respect.

2. Quality

There’s often a correlation between cost and quality: the more expensive the product, the better the quality. Regardless of price, there is still a predetermined, agreed level of quality, and you want to be sure that your expectations are met.

After all, the last thing you want to do is market your products as high-end, when your supplier sends you something completely different.

Quality doesn’t just refer to the physical product itself, but its associated aspects too. Are the products packaged adequately, protecting them in transit? Are they labelled correctly? Speak with potential suppliers to ensure that you’re fully aware of what they will offer you – you don’t want to sign a contract and then be disappointed.

3. Reliability and previous experience

It’s important to remember that when choosing a supplier, you’re essentially entering into a long-term relationship with them. It’s similar to hiring a new recruit – you’ll want to see references.

Don’t be afraid to ask for them: it makes sense that you would want to hear from businesses who have worked with specific suppliers in the past, as they can give you an honest account of what the partnership was like, and list any good or bad points.

If you’re deciding between two suppliers, references can make all the difference when deciding who to choose.

Your chosen supplier will directly reflect upon your business. If they send over a batch of products two weeks late, the customer who ordered that product will blame you, not your supplier.

4. Shared culture

Expectations are only met when they are clear on both sides. A good supplier relationship is built on shared cultural goals and attitudes. Speak with suppliers directly to find out how they like to work with other businesses. If you want constant communication but they prefer to just “get on with it”, then realistically, that’s not going to work.

Top-down view of people around a table on their laptops

When speaking with suppliers, whilst you’ll have questions to ask them; it’s likely they’ll have equally as many questions for you. Use this time to gauge whether your culture and expectations are similar, as you should get a good idea of whether or not the relationship will work.

5. Location

When choosing a supplier, location is a big factor to consider. If you’re a local business that has built your brand on expertise in your area, then you’ll want to focus on finding a supplier who is located nearby, and shares your values.

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