Paper production is a complex process that relies on intricate machinery and equipment. One critical component of these machines is the paper machine bearing.
Before we dive into the role of bearings, it’s essential to understand the types of paper machines. Paper machines can be categorized into two main types: Fourdrinier machines and cylinder machines. Each type has its own set of machinery and components.

The Role of Bearings in Paper Machines

Bearings in paper machines serve several vital functions, including:

• Load Distribution: Bearings help distribute the weight and loads generated during the papermaking process, preventing excessive wear and tear on the equipment.
• Reduction of Friction: Bearings minimize the friction between moving parts, ensuring smooth and efficient machine operation.
• Alignment Maintenance: They assist in maintaining the alignment of various machine components, preventing misalignment-related issues.

Advantages of Paper Machine Oilless Bearings

Oilless bearings provide several advantages:

Maintenance-Free: They do not require regular lubrication, reducing maintenance efforts and costs.
Environmentally Friendly: Oilless bearings are eco-friendly, as they do not release oil into the environment.
High Durability: These bearings are designed to withstand high temperatures and heavy loads, ensuring longevity.
Low Friction: They offer low friction, contributing to energy efficiency and reduced wear and tear.

Bronze With Lubricant Plugs Embedded are made of strong cast bronze-based metal with special solid lubricants embedded. The base metal withstands high loads and the solid lubricants provide self-lubrication. The bushing shows excellent performance without pre-lubrication under conditions of extremely high/lower temperature with low speed. This material provides a maintenance-free bushing solution, particularly for high-load, intermittent oscillating motion.

Bronze With Lubricant Plugs Embedded find applications in various areas of paper machines, such as:

Rollers: Used in paper machine rollers, where they reduce friction and ensure smooth paper processing.
Drying Cylinders: Oilless bearings are employed in the drying section to withstand high temperatures and provide continuous support.
Winders and Unwinders: These bearings help maintain precise alignment during winding and unwinding processes.

Bronze Straight Bearing With Graphite Round Plugs

Bronze straight bearings with graphite plugs are commonly used in various industrial applications, including machinery, engines, and equipment where smooth, low-friction movement is essential. They are valued for their ability to withstand heavy loads and provide reliable performance over extended periods without the need for continuous external lubrication. This type of bearing is often used when traditional oil or grease lubrication is impractical or when maintenance-free operation is desired.

Features Of Solid Lubricant Bronze Bushing

• May work without oil for long periods
• Extremely high load capacity, with good anti-wear and lower friction
• Particularly appropriate for low speed and high load
• Suitable for reciprocating, oscillation, or Intermittent motion where an oil film is hard to form
• Good chemical resistant and anti-corrosion characteristics
• Can be used in wide range of temperature from -40°c~+300°c

Technical Details

• Specific load capacity static150 [N/mm2]
• Specific load capacity dynamic100 [N/mm2]
• Sliding speed≤ 0.3 to 1.0 [m/s]
• Friction value0.03 [µ] to 0.2 [µ] lubricated/dry
• Temperature strain– 100 [°C] to + 300 [°C]
• Max. PV-value1.5 [N/mm² x m/s]
• Hardness: 190-220 HB

Bronze With Lubricant Plugs Embedded Materials

• Support materialCuZn25Al5
• Sliding layerSolid lubricant surface: app. 25-30%
• Other commonly used bronze alloys: CuAl10Ni, CuSn12Pb, CuSn7ZnPb

Tolerance Details

• Housing ØH7
• Bushing inner-Ø after mountingPls consult our sales engineers, standard delivered tolerance: r6 or E7
• Shaft tolerancef7 or h6

Shaft Material

• The shaft hardness should be at least 70-100HB harder than the bronze alloy.
  Surface roughness ≤ Ra 0.8