Bearing Guide: Ball Bearing or Bushing? What is the Purpose of Sealing?

When a conveyor system "doesn't work," the first thing blamed is often the outer surface. However, the real factor determining the quality of movement in the field is the bearing structure inside the hub. A ball bearing setup, when correctly selected, offers lower rolling resistance and smoother movement. Sleeve solutions, in the right scenario, can provide sufficient stability with a good cost/performance balance. If chosen incorrectly, they inevitably lead to increased weight, noise, increased maintenance needs, and premature wear.

In Burak Teker's approach, bearing selection isn't simply described as "buy the best." Because the concept of "best" varies depending on parameters such as dust, humidity, chemical contact, load level, speed, impact, maintenance discipline, and budget. This guide clarifies the difference between ball bearings and bushings, and practically demonstrates why sealing is a critical breaking point in many scenarios.

What is the purpose of a bearing? Simple definition, clear impact.

The function of a bearing is to control friction during rotational movement. As friction decreases, rolling resistance decreases. As rolling resistance decreases, the system runs more smoothly, the operator applies less force, the slip rate decreases, and the risk of marking on the ground is reduced. In addition, the mechanical components heat up less and wear out more slowly. Therefore, bearing selection is a critical decision not only in terms of "performance" but also in terms of total cost of ownership.

What are ball bearings? When do they offer an advantage?

How a ball bearing works

Ball bearings enable rotation through balls between the inner and outer rings. Because the balls reduce the contact surface area, friction is generally lower. This produces an advantage in terms of smoothness, especially under heavy loads and continuous use.

Advantages

- Lower rolling resistance and smoother ride.
- More stable performance under load.
- Deterioration begins later with long-term use.
- More controlled turning behavior and lower risk of drag.

Disadvantages

- The cost is generally higher compared to bushing solutions.
- It can get dirty quickly if left unprotected against dust, water, and chemical contact.
- Its performance can rapidly deteriorate in unmaintained environments.

What is a Sleeve (Zodiac Sign)? When is it relevant?

How the zodiac sign works

The bushing transmits rotational motion not through balls, but through a sliding surface mechanism. Its simple structure offers a cost advantage. It can provide sufficient performance within the correct speed and load range. However, its friction characteristics differ from ball bearings, and it may wear out sooner under heavy loads/intensive use.

Advantages

- A more economical solution
- Simple structure, stable use in some applications.
- Sufficient performance in short-distance and low-speed scenarios.

Disadvantages

- Rolling resistance may be higher compared to ball bearings.
- Worsening may occur more rapidly with heavy use.
- Frictional heat and surface wear may become more pronounced.

What is a Sealing Bearing Used For? The Real Game Changer

Sealing is the protective layer that separates the inside of a bearing from the external environment. This layer makes it difficult for dust, moisture, water, and chemical particles to enter the bearing. Dirt that enters the bearing combines with oil to form a paste, increasing friction. The result is reduced fluidity, increased noise, and premature wear. Sealing slows down this cycle, helping performance remain stable for longer.

Its effect in dusty environments

Warehouses, workshops, and production areas have high fine particle loads. When these particles enter the bearing, they abrade the bearing surface of the balls. The sealed structure significantly reduces this effect.

Its effect in a humid environment.

Moisture and water increase the risk of corrosion inside the bearing. Corrosion quickly produces a rough surface, which manifests itself as a "loss of fluidity" in the bearing. Sealing makes it difficult for moisture to enter.

Chemical contact and cleaning routines

In industrial cleaning environments, chemicals can degrade the lubricant inside bearings or negatively affect their surfaces. Sealing reduces the penetration of chemicals into the bearing, resulting in more stable performance.

Which Scenario? The Quick Choice Logic

Heavy use, heavy load, long distance.

In this scenario, the goal is low rolling resistance and stable fluidity. Ball bearings, especially when combined with a sealed design, are a more suitable option because they reduce sliding behavior under heavy loads, decrease operator strain, and extend maintenance intervals.

Low/medium usage, short range, controlled speed.

In this scenario, a bushing solution might be sufficient in terms of cost/performance. However, if the ground is rough or the environment is dusty, heavier wear on the bushing may be observed sooner. Therefore, environmental conditions can be decisive even if there is "infrequent use".

Dusty, humid areas with a risk of chemical contact.

In these areas, sealing is at the heart of the selection process. Even non-sealed ball bearings can become contaminated quickly. Therefore, the fundamental decision here is to accept a sealed structure as the standard and then choose between ball bearings or bushings based on load and usage intensity.

6 Field Signs of Incorrect Bearing Selection

1) Walking is fine in the first few weeks, but quickly becomes difficult.
2) Getting stuck and delayed turning on the return journey
3) Increased noise and metallic friction sensation.
4) Increased operator pressure and dragging behavior
5) Increased risk of tracks on the ground (due to increased slippage rate)
6) Shorter maintenance and parts replacement intervals.

Burak Teker Standard: Making the Selection Based on the “Environment + Load + Maintenance” Triangle

In bearing selection, the correct result is not achieved by optimizing a single parameter. Environmental conditions (dust, humidity, chemicals), the nature of the load (static/dynamic, impact), and maintenance discipline (periodic cleaning and inspection) must be evaluated together. Burak Teker's approach aims to create an installation that not only performs well on day one, but maintains the same smoothness even after six months, thus reducing overall cost.

Why Do Bearing Problems Accelerate? 8 Root Causes

Just as a wrong choice can cause a correctly selected bearing to lose performance quickly in the field, there are some root causes for these problems. Many of these root causes are dismissed as "poor bearing quality"; however, the real reason is usually hidden in the triangle of environment, installation, and usage. Below are the 8 most common root causes we see in the field at Burak Teker.

1) Dirt entering the bearing and the oil turning into a paste.

When dust, chips, and microparticles enter the bearing, they combine with the lubricant to form a layer that increases friction. This layer abrades the surface of the balls, producing micro-wear on the inner and outer rings. The first signs are increased weight and noise. Once this cycle begins, it accelerates unless cleaning is performed.

2) Moisture and corrosion

In humid environments or areas where washing is performed, water vapor increases the risk of corrosion inside bearings. Corrosion roughens surfaces; as roughness increases, friction increases and fluidity decreases. This problem occurs more quickly, especially in non-sealed structures.

3) Lateral load and axial misalignment

Bearings are designed to manage the load along a specific axis. When the mounting angle is disrupted or the chassis rigidity is weak, the lateral load increases. As the lateral load increases, the contact geometry within the bearing deteriorates, the balls do not rotate along the correct line, and premature wear begins. This situation manifests itself as the complaint "it rotates but feels heavy".

4) Limiting the use of capacity

Operating at capacity limits increases the contact pressure inside the bearing. As the load increases, pitting and microwear occur on the ball surfaces. As this wear progresses, smoothness decreases and noise increases. Allowing some capacity clearance slows down this wear cycle.

5) Impacts and microshocks

Situations such as thresholds, joints, rough surfaces, and impacts generate micro-shocks on the bearing. These shocks can quickly cause "surface degradation." Even if the catalog capacity is correct, the bearing will wear out sooner if the impact intensity is high. Therefore, the characteristics of the surface are a decisive parameter in the selection process.

6) Incorrect cleaning chemicals and degreasing.

Some cleaning chemicals used in industrial settings may be incompatible with bearing oil. Friction increases when the oil's viscosity changes or when the oil dissolves. This occurs much more quickly if the seal is weak. In areas where chemical cleaning is routine, a higher level of protection should be chosen.

7) Inappropriate maintenance approach

Just as neglecting maintenance creates problems, so does improper maintenance. Random lubrication accelerates dust accumulation and can quickly form a heavier layer. Furthermore, excess oil can seep out from certain components, increasing dirt buildup. The correct approach is to first remove dirt, then apply minimal lubrication as needed, and plan the lubrication period accordingly.

8) The sealing level does not match the scenario.

If there is no seal or the seal is weak, the bearing will become contaminated faster. However, not every sealed structure provides the same performance. If the environment has high dust and moisture concentrations, the seal level should be considered standard. Otherwise, performance may appear good in the first few months, but then a rapid decline will begin.

Types of Seals: What Do They Mean in Practical Terms?

Most people think of sealing as a single concept. However, there are different levels, and each level is meaningful in a different context. This section clarifies the practical meaning of sealing without overwhelming you with technical terms.

Unprotected structure

The bearing is more exposed to the external environment. In clean and dry environments, with low dust levels, it may not cause problems in the short term. However, contamination increases rapidly in areas such as warehouses and workshops.

Basic protection

There is some protection at the bearing inlet. This can maintain more stable performance in daily use and relatively clean environments. It can provide a good balance in areas with moderate levels of dust and humidity.

Leakproof structure

It should be considered as a structure that significantly reduces dust and moisture ingress. This structure helps performance "remain consistent for longer" even in heavy use and dirty environments. Therefore, it makes the biggest difference in the field by extending the maintenance interval.

Short Technical Specification Clauses for Procurement

The biggest problem in corporate procurement is the lack of clear criteria for comparing products. The following points make it easier to compare offers on a level playing field during the purchasing process.

Mandatory information headings

- Load capacity (considering static and usage scenarios)
- Bearing type (ball/bushing) and target usage intensity
- Leakage level and environmental suitability (dust/moisture/chemicals)
- Material structure and ground compatibility (tracking and noise target)
- Mounting type and connection tolerances
- Maintenance recommendations and expected maintenance period.

Additional factors that speed up decision-making.

- Floor type and obstacle passage scenario (joints, thresholds, textures)
- Turning density and limited maneuvering space
- Operator usage style (stop-start, speed, brake)

Quick Choice Table Logic: Approaching the Correct Structure with 3 Questions

Three questions are enough to make a quick decision without going into detail. These questions filter the right structure.

Question 1 - Is the environment dirty? (dust, humidity, chemicals)

If the environment is dirty, a leak-proof design becomes a priority. If there is no dirt, a more flexible leak-proof level can be chosen.

Question 2 - Is the usage intensive? (all day, constant movement)

In heavy-duty applications, smoothness and stable performance are paramount. In this scenario, ball bearings offer a greater advantage. For lower density applications, bushing solutions may be sufficient in terms of cost/performance.

Question 3 - Are the load and ground conditions challenging? (heavy load, joints, rough terrain, thresholds)

Dynamic effects increase when the load is heavy and the terrain is difficult. In this case, both capacity allowance and protection level become more critical. The wrong choice leads to rapid deterioration and the need for early maintenance.

Burak Teker's Perspective: The Measure of Performance is Not "First Day" but "Sixth Month"

Choosing the right bearing isn't about smooth operation on day one; it's about maintaining that stability even after six months. Therefore, the selection process should consider appropriate protection against environmental conditions, a structure and capacity allowance suitable for the intensity of use. Burak Teker's standard treats bearing decisions not just as a cost item, but as a matter of total cost of ownership and operational continuity. This perspective means fewer failures, less drag, less maintenance, and higher field productivity.

Conclusion

Bearing selection is a "critical decision point" that determines the smooth operation of conveying systems. Ball bearings offer the advantage of low rolling resistance, more stable running, and later performance loss under heavy use. Bushing solutions, on the other hand, may be sufficient in terms of cost/performance in the right scenario; however, they carry a higher risk of premature deterioration under heavy loads, long distances, and intensive use. Therefore, the selection should not be based solely on price, but should be made by evaluating environmental conditions, usage intensity, and load characteristics together.

In the field, the real game-changer is often sealing. Dust, moisture, and chemical contact accelerate oil paste formation, corrosion, and surface wear, reducing fluidity. A sealed structure slows this cycle and extends the maintenance period. Burak Teker's standard is not about "running well on day one," but about "maintaining the same stable performance months later," by establishing the right protection level, the right capacity share, and the right usage scenario together. This approach reduces the risk of failure, decreases operator strain, and clearly lowers the total cost of ownership.

FAQ

1) Are ball bearings always better?

Not in every scenario. For heavy use, heavy loads, and long distances, it is generally more advantageous. For low-intensity and short-distance use, bushing solutions may suffice. Environmental conditions and maintenance discipline are central to the decision.

2) Why is leak tightness so critical?

When dust, moisture, and chemical particles enter the bearing, the lubricant thickens, friction increases, and fluidity decreases. Sealing reduces these ingresses, ensuring stable performance for longer periods.

3) How can you tell if the bearing is faulty?

Early signs include rapid heaviness, catching during turns, increased noise, a metallic friction sensation, and the need for the operator to apply more force. These signs indicate the start of a fouling or wear cycle.

4) Why do some systems perform well in the first few weeks, then rapidly deteriorate?

This usually occurs due to dirt ingress, oil paste formation, moisture-corrosion, lateral load and axial misalignment, or capacity exceeding limits. The sealing level and assembly accuracy are crucial here.

5) Why does random lubrication cause problems?

Lubrication without first removing dirt traps dust more quickly and causes a denser layer to form. It provides short-term relief but quickly creates a more severe weight problem. The correct approach is cleaning first, then minimal and targeted lubrication.

6) What is the best approach in dusty and humid environments?

The level of protection should be considered as a standard. That is, a leak-proof structure is selected first, then a ball bearing/bushing decision is made based on usage intensity and load characteristics. This method significantly delays performance loss in the field.

7) What information should you absolutely request during the purchasing process?

The bearing type, sealing level, capacity, and target usage scenario, ground compatibility, mounting type, and maintenance period must be clearly stated. Without this information, bids cannot be compared effectively.