1. Pneumatic rubber fender  is made of synthetic-cord-reinforced rubber sheet with compressed air inside to enable it to float on the water and work as a protective medium. Therefore, Floating marine rubber fender serves as a critical protective medium against collision when ship-to-ship (STS) transfer operations and ship-to-dock (STD) berthing and mooring operations.
Pneumatic rubber fender  have the advantages of massive energy absorption with low unit surface pressure acted upon the ship. So pneumatic rubber fender has become an ideal ship protection medium used extensively by large tankers, LPG vessels, ocean platforms, bulk carriers and floating structures, large docks, harbor and wharfs.
2. Classifications of pneumatic rubber fender:
Initial Internal Pressure Rating
There are two initial pressure rating for Evergreen pneumatic rubber fender :
A) Pneumatic 50 (Initial internal pressure 50 kPa)
B) Pneumatic 80 (Initial internal pressure 80 kPa)
3. Fender Type of  Floating marine rubber fender
There are two types for pneumatic rubber fender:
A) Net-type Fenders
The fender is covered by a protection net consisting of either chain, wire or fiber and usually with tires or rubber sleeves.
B) Sling type
The fender is designed to be used without a protection net. It's easy to hand because of their lightweight.
| Size | 50or80 | EA | RF | HULL PRESSURE |
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Cnc Lathe is suitable for the turning of cylindrical surface, bore, thread cutting, arc surface and etc. CNC Lathe has been widely used to produce spare parts for the mechanical industry, motorcycle industry, automobile industry, oil pump, medical industry and etc.
Features:
1. The CNC lathe frame is made from HT300 cast iron and the frame is integrated with bed foot made of one-piece casting. The width of bed`s guide rail reaches 440mm. All of them guarantee that this lathe has high rigidity and stability.
2. The basic components of CNC lathe are made of resin sand casting and processed with aging treatment. The guide rails have been treated with high-frequency quenching and fine machining to guarantee the lathe`s long-term stability.
3. The main drive system of CNC lathe adopts manual control and consists of three gears (low, medium, high gears). Equipped with encoder, it can realize stepless speed regulation. The main spindle adopts high-precision special spindle which is suitable for heavy machining, as it has the distinctive features of high precision, high rigidity, small thermal deformation, smooth running and little noise.
4. The longitudinal and transversal feeding systems adopt semi-closed loop control. They are driven by servo motors and the power is transmitted by high precision ball screws. The pulse encoder will send feedback to test positioning accuracy.
5. The guide surface for longitudinal and transversal feeding systems is pasted with plastic which has little friction resistance and avoids low-speed climbing.
6. Hydraulic, pneumatic chuck and hydraulic or pneumatic tailstock is optional.
7. The lathe adopts centralized automatic lubrication system which can reduce the wearing of moving parts and prolong their service life.
CNC Lathe
Automatic Lathe,Cnc Machine Tools,Cnc Horizontal Turning Lathe
Shandong Zecheng CNC Machinery Co., Ltd , http://www.zccncmachinery.com