JDB‑650 adopts high‑strength copper alloy as base material. According to actual working conditions, cavities are machined on its working surface and filled with solid lubricant in a certain proportion. The high‑strength copper alloy delivers high load‑bearing capacity, while the solid lubricant creates a low‑friction friction pair. Under dry‑friction conditions, a pre‑lubricating film is designed on the bearing surface to ensure that solid lubricant transfers to the mating counterpart in the shortest possible time and forms an effective solid lubricating film.

When two non‑lubricated surfaces rub against each other, the uneven asperities on both surfaces undergo shearing, local adhesion and plastic deformation, which give rise to friction and wear. Conventional lubricants can significantly mitigate these effects. Nevertheless, under static pause, especially at heavy loads, lubricating oil and grease will be squeezed out, resulting in boundary lubrication or dry friction. For JDB‑650, the lubrication source comes from the material itself. Once micro‑movement occurs in the bearing, the solid‑lubricant material tends to produce laminar slip under external extrusion‑deformation or frictional force, thereby forming a solid lubricating film on the sliding surface. This film features low shear strength and can firmly adhere to the bearing surface without rupture even under heavy static loads. Such embedded solid lubricant continuously supplies lubricant to friction surfaces to reduce frictional resistance and wear, enabling long‑term bearing operation at a low wear rate.

Precautions for use:

1.Adopt standard sizes wherever possible during design;

2.Check for foreign matters on surfaces before assembly;

3.The sliding surface may turn black or grey‑black after service due to the solid‑lubricant film. Do not wipe it off and continue normal operation;

4.Coating the mating shaft with lubricating oil prior to assembly can shorten the running‑in period and facilitate machine operation;

5.Press‑fit slowly during assembly. Hammering is strictly prohibited to avoid bearing damage and deformation;

6.Select appropriate materials for different application positions in design to improve mechanical performance and extend bearing service life;

7.Screw fastening is recommended for reciprocating motion under high loads;

8.For fresh‑water, seawater and offshore applications, stainless steel or chrome‑plated surface is recommended for the mating shaft.