What is SDX Bearing? (2) ✅ FAQ 1. What is the difference between SDX and dry-bearing SDU? SDU is a dry-bearing that can operate without lubrication and is resistant to most solvents and industrial fluids. On the other hand, SDX bearings are pre-lubricated by applying grease during assembly and are generally used in agricultural machinery, hydraulic machinery, and automobiles. 2. What is the plating material for the outer diameter? It is usually tin-plated with a thickness of about 0.002 mm, and copper plating is available upon request. 3. Is there any difference in performance depending on the POM colors? There is no difference in the performance and price from the standard product (yellow POM + tin plating). Other colors besides yellow POM can be made to order. SDX bearings with PEEK are recommended for high-temperature environments such as high-pressure gear pumps, water injection pumps, paint spraying, etc. 4. What material is recommended for the shaft? It can be used with all...
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What is SDX Bearing? (1)
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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.
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,
- 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. 🥰
Bronze Casting Processes for Oil-less Bearings (3) The last letter covered Horizontal Continuous Casting, and we will introduce Metal Extrusion as the final episode of the casting process for oil-less bearings. Extrusion Extrusion is a forming process that enables the continuous production of tubular or rod-shaped products with a uniform cross-section by extruding material through a mold. The material coming out of the mold is called the extrudate, and non-metals such as ceramics, plastics, and polymers are also suitable for extrusion. UBE 2,750 ton Hot Extrusion Machine Extrusion at room temperature is called cold extrusion, and extrusion by heating the billet above its recrystallization temperature to soften the metal is called hot extrusion. The extrusion process has a high initial cost and requires high compressive force, but it has many advantages technically and economically. Heated Billet Before Extrusion Continuous casting allows th...
SGO THEDVELON Bearings SGO THEDVELON THEDVELON is a type of oilless bearing that offsets the disadvantages of the sintered metal bearings by applying a heat treatment on a steel-backed material. It can be used for medium to high loads by supplementing the insufficient mechanical rigidity through diffusion-bonding the sintered layer and the back-steel, and the porosity of the sintered layer can also be varied. While it has an excellent abrasion resistance, it is highly price competitive owing to lower material costs compared to the conventional brass bearings. For any inquiries about THEDVELON , please contact us by clicking the button below. INQUIRY
Types and Characteristics of Major Copper Alloys used for Oil-less Bearings SGO mainly manufactures Oil-less bearings using high-strength brass but used different bronzes per application. We will introduce the most used bronzes with characteristics and their uses. ※ KS D 6024 We have only introduced five materials that have been asked a lot, and there are many other copper alloy materials. You need to choose the base metal and solid lubricant depending on the working load, speed, and other working conditions of the bearings. SGO has a one-stop process from material to finished product, so if you need advice on Oil-less bearing, please don't hesitate to contact us. INQUIRY
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