SGO Korea Newsletter April' 2023 : What is SDX Bearing? (1)

2023. 4. 19.

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All About SGO Bearings🔍

- What is SDX Bearing? (1) -

SDX Pre-lubricating Bearing

SDX, characterized by its ability to retain grease effectively, is a boundary-lubricated, between fully lubricated and dry-lubricated, bearing. These are also called pre-lubricated bearings because they are pre-lubricated with grease in oil pockets on the inner diameter when assembled.

*Boundary lubrication: Lubrication in a state where the oil film is so thin in the bearing area that the shaft and bearing surface are likely to come into direct contact. It's also called imperfect lubrication.

Structure

SDX is a composite bearing made of steel-backing, porous bronze, and acetal resin.

① Steel-backing (low carbon steel): Provides mechanical strength and thermal conductivity and enables thin and compact design.

② Porous Bronze (0.20 ~ 0.25mm): Porous bronze inner layer impregnated with acetal resin is rigidly sintered to steel backing, which acts as a good heat conductor to minimize excessive temperature rise on the bearing surface and provides dimensional stability.

③ Acetal Resin (Polyoxymethylene (POM) 0.3 ~ 0.5mm): Features excellent wear resistance and frictional power with only a small amount of lubricant on the polymer surface.

④ Plating (Tin/Copper 0.0002mm or more): Prevents corrosion.

Characteristics

< Mechanical Properties >

* The above data is under the condition of grease and oil supply and is subject to change without notice

for improvement.

< Characteristics >

① It has high durability in the retention capacity of the lubricant.

②It maintains excellent load-carrying capacity even under oscillating and fretting conditions.

③ It has a low friction coefficient and excellent wear resistance in pre-lubrication.

④ It has an excellent ability to tolerate misalignment.

Applications

- Agricultural machinery: Gearbox, Clutch, Front axle pivot bearing,

Steering idler box bearing, etc.

- Hydraulic machine: Hydraulic pump (piston rod guide), Oil gear pump,

Rotary actuator bearing

- Automotive: Steering, Suspension joints, Joint hinges, Kingpin assemblies,

and Stub axles

- Material handling equipment and lifting equipment: Forklift transfer gearbox,

Crane transmission gearbox, Vertical guide roller for garbage truck lift, etc.

In today's letter, we learned about the characteristics and applications of SDX bearings. In the following letter, we plan to collect and answer the FAQs about pre-lubricating bearing SDX, and please look forward to the second newsletter. 🥰

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