connecting rod bearing

Deep groove ball bearing with seals or shields

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.Integral sea

ling prolongs bearing service life

Simple, versatile and robust design

Low friction and high-speed capability

Accommodate radial and axial loads in both directions

Require little maintenance

Knowledge and introduction of bearings    :                                                                                                 

Connecting rod bearings are critical components in the internal combustion engines of vehicles, transferring the linear motion of the piston to the rotational motion of the crankshaft. Here's a detailed introduction to connecting rod bearings:

1. Function:

• Connecting rod bearings facilitate the pivotal movement of the connecting rod at both the small end and the large end. The small end connects to the piston via a piston pin (gudgeon pin), while the large end connects to the crankshaft journal. These bearings ensure smooth and efficient transfer of power from the piston's reciprocating motion to the crankshaft's rotational motion .

2. Anatomy:

• A typical connecting rod has two types of ends: a small end and a large end. The large end, also known as the big end, connects to the crankshaft and houses the bearing inserts that ride on the crankshaft journals. The small end, which connects to the piston, often features a phosphor bronze bushing .

3. Materials:

• Connecting rod bearings are made from a variety of materials, including low carbon steel, copper lead alloy, copper tin alloy, tin antimony alloy, tin antimony copper alloy, lead indium alloy, lead bronze alloy, and tin aluminum alloy . These materials are chosen for their durability and ability to withstand the high pressures and loads within the engine.

4. Types of Bearings:

• Bush Bearings: The small end of the connecting rod often features a bush bearing made from phosphor bronze, which has a solid eye that connects to the small ends of the rod .

• Bearing Inserts: The large end of the connecting rod has bearing inserts attached to the bearing cap. These inserts consist of two parts that engage on the crankshaft, allowing the rod to move in the opposite direction .

5. Lubrication:

• Connecting rod bearings require lubrication to minimize friction and wear. Lubrication is typically provided through splash lubrication at the big end of the crankshaft and pressure lubrication at the small end bearing .

6. Maintenance and Clearance:

• It's crucial to maintain the correct clearance between the bearing and the crank surface (running bearing clearance) and between the crankpin and the crank arm (side bearing clearance) to ensure proper operation and prevent excessive wear .

7. Inspection:

• Connecting rods and their bearings are subject to significant stress and must be inspected regularly for any signs of damage or wear. This inspection is particularly important after incidents such as preignition or detonation, which can cause the rod to bend .

8. Industry Standards:

• The manufacturing and design of connecting rod bearings adhere to strict industry standards to ensure consistency, reliability, and performance across various engine types and applications.

In summary, connecting rod bearings are essential for the operation of internal combustion engines, enabling the conversion of linear motion to rotational motion with minimal power loss. Their design, material selection, and maintenance are critical to the overall performance and longevity of the engine.

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