Firestone Pneumatic Air Suspension W01-358-7405 Replacement Double Convoluted Spring

OEM NO.

Specifications and Detailed Technical Parameters:AIRSUSTECH 2B7405

• Nut/blind nut

Top plate screw (nut) teeth: 1/2-13UNC; 3/4-16UNC
The screw center distance of the top cover plate: 140mm
Screw (nut) teeth of the bottom cover plate: 2X1/2-13UNC
The screw center distance of the bottom cover plate: 157 mm

• Air hole/air inlet/air fittings

Air hole/air inlet: 1/4-18NPTF

The screw center distance between the air hole and the nut: 140mm

Air Inlet Combine With One Nut

• Cover plate

Top plate diameter: 231 mm

Diameter of the bottom cover: 231mm

• Rubber Bellows

Rubber Bellows MAX Diameter : 325 mm / 12.9 inches

Compressed Height: 81 mm / 4.12 inches

Minimum Jounce Height: 81mm / 4.12 inches

Maximum Height: 305 mm / 12 inches

Working Stroke : 224 mm / 8.8 inches

• Bumper block/bumper block

Without bumper block

• Belt loop/Belt loop

With belt loop: One belt loop

Min. pressure: 0 bar

Return force to min.height: ≤300N

Overall weight with clamped plates: 5.1kg

Vibration isloation-dynamic characteristic values
Design height H: recommended 220mm, minimum 205mm

Pneumatic application-static characteristic values

Force F[KN]

The related picture of 2B7405

The difference between air spring and ordinary spring

1.Stronger elasticity

Compared with ordinary springs, air springs have stronger elastic force and can meet the use of some large equipment. Although the elasticity of ordinary springs is not weak, it may be difficult if used in some large equipment, and ordinary springs need to take up a lot of space, so they are not used in some high-tech products.

2. With shockproof function

We all know that ordinary springs have no shock-proof function, which is the main reason why ordinary springs are easily damaged. Because it is used in large equipment, the spring has to work many times a day. Without the shockproof function, the spring will be worn out every time it works, so it will be damaged quickly.

3. Work performance will not be degraded due to usage time

After a period of use of ordinary springs, the working performance will gradually decrease, because after many times of work, the elasticity of ordinary springs will become worse and worse due to aging. However, the air spring is different, and the working performance will not be reduced due to the increase in the use time or the number of uses. According to the test data of some professional institutions, this kind of spring will not have any problems after 2 years of use.

Guangzhou Guomat Air Spring Co., Ltd. is located in Guangzhou, about 15min’s drive from Baiyun Airport. Our mainly products are air spring, rubber bellows, air suspension spring, air suspension compressor and refitted suspension system. They are widely used in bus, truck, cabin, vehicles’ seat, luxurious car and industrial machine field.

AIRSUSTECH is another brand of Guangzhou Guomat Air Spring Co., Ltd. 

AIRSUSTECH is focus on industrial air spring.

GUOMAT Factory gate：

Established in 2008, Our company covers 20,000㎡ and is located in Taihe Town Baiyun District. With the rapid development of our company, we are equipped with modernized workshop and advanced rubber air springs equipments now. We are the first company who started air spring business and has become one of the largest air spring manufacturing bases in China.

In 2017, we launched a collaboration with High Tech of US customers to customize the products of our customers and the logo of our customers. Every year, there are about 10,000 orders. In continuous cooperation, the products meet the international inspection standard ISO/TS16949:2009, and the customers are very satisfied with the products produced. This is our high recognition from American customers and also gives us Great motivation.

In 2018, we started cooperation with German GmbH, mainly industrial air springs, which are suitable for industrial equipment. We have successfully developed and produced the natural air-seal of the skin to reach the 700mm flanged air spring, the customer's annual demand is a few hundred.

With the development of business and demand for customers, our company introduced business with TomLog Corporation in 2010, our strategic cooperative partner in Taiwan. Then we developed air compressor program and air spring related business, in 2015, America Goodyear Corporation met with the transfer of shares in the North American plant, our company was granted with sale agent for air springs in China, providing more choice for our customers. Our company adopts the most advanced domestic air spring processing equipment and international production technology. Combined with unique production process, our company strictly execute international standards for production and spare no efforts to create the world-class products. We will endeavor to make air spring widely used at home and abroad, and let more and more customers to enjoy the best damping effect.