SGO Korea Newsletter May' 2023 : What is SDX Bearing? (2)

2023. 5. 17.

All About SGO Bearings🔍

- What is SDX Bearing? (2) -

In today's letter, we respond to some frequently asked questions about SDX bearings introduced in the last letter. If you haven't seen our previous letter yet, please click the red text to check it out!

✅ 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.

Copper-plated SDX

Tin-plated SDX

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 conventional shaft materials, but the roughness must be Ra 0.4 or higher. Heat treatment is not necessary, but it is recommended to heat-treat the hardness to HRC40 or higher if there is interference from foreign substances.

5. What type of grease should I use?

When selecting lubricants, the factors such as the maximum operating temperature in the working environment, lubricant stability, and contamination level should be considered. Generally, lithium grease is recommended for initial assembly, but if the operating temperature exceeds 40°C, the performance of the bearings may deteriorate. For maximum operating temperatures around 80°C, silicone grease is recommended. In highly contaminated environments, grease should be used rather than oil, regardless of the presence of seals.

6. Can I order custom-made products?

SDX bearings are available in bushing, washer, and plate forms, and custom-made products with oil grooves or holes can be ordered. You can purchase standard components from SGO's online store.

Two letters about SDX bearings have been completed, and the <All About SGO Bearings> series will continue. If you have any products that you would like to be included in SGO's newsletters, please feel free to contact SGO at any time. 👨‍🏫

CSPI-EXPO 2023

SGO will participate in The 5th Construction & Survey Productivity Improvement EXPO 2023 from May 24 to May 26 in Japan.

CSPI-EXPO 2023 is the largest specialized exhibition in the construction and surveying industry in Japan and provides an outdoor hall to check the operating status of the actual machine and seminars introducing the latest cases.

SGO plans to introduce a new development, Sintered bearing, used under harsh environments such as construction and mining equipment at CSPI-EXPO 2023. Please stop by and check SGO's high-quality products.‍