Pin 16Y4000005 16Y-40-00005 Bearing 16Y4000006 16Y-40-00006 Suitable for bulldozer SD16

Pin 16Y4000005 16Y-40-00005 Bearing 16Y4000006 16Y-40-00006 Suitable for bulldozer SD16

"Pin" and "bearing" are two closely related but functionally different parts in mechanical design, often used together in rotating or oscillating joints (such as linkages, hinges, etc.). Together they form a simple sliding bearing structure.

Pin:

Definition: A short, strong cylindrical shaft. It is typically used to connect two or more parts, allowing them to rotate or oscillate relative to each other about the pin's centerline.

Function: Transmits force (usually shear force). Provides a pivot point for rotation or oscillation. Maintains the relative position of connected parts.

Characteristics: Surfaces typically require high hardness, smoothness, and wear resistance to reduce friction and wear.

Can be solid or hollow. Both ends typically have structures (such as snap ring grooves, threaded holes, and heads) for fixation to prevent axial movement. Material: Usually high-strength, wear-resistant steel, such as alloy steel (e.g., 40Cr), with surface hardening treatments such as quenching and carburizing.

Bearing Bushing:

Definition: A type of sliding bearing bushing. It is an arc-shaped or circular bushing installed inside the bearing housing bore, fitting over the pin (or journal) to serve as a support surface for the pin's rotation or oscillation.

Function: Provides a low-friction, wear-resistant support surface for the pin. Bears the load transmitted from the pin (primarily radial load). Protects the bearing housing (usually a more expensive part) from wear.

Typically designed with lubrication structures (oil grooves, oil holes) to introduce and distribute lubricating oil, forming an oil film to reduce friction and wear.

Characteristics: Usually made of anti-friction materials, possessing good tribological properties (low coefficient of friction, good embeddability, compliance) and wear resistance.

Simply put: a pin is a shaft that rotates by being inserted inside, while a bushing is a sleeve that fits over the pin to ensure smooth rotation and reduce wear.