Surface Treated Neptune Chain Features and Applications
Tsubaki's newly developed surface treated chain NEP series Neptune, which combines special coating and special resin coating, has been renewed with superb resistance to corrosion, rust, and chemicals!
Superb resistance to corrosion by water and alkaline chemicals
Plus greatly improved resistance to salt water
The upgraded chain has improved resistance to corrosion from salt water. It can withstand 1,000 hours of exposure to salt water, compared to 700 hours with the previous series
It also has excellent resistance to alkaline chemicals, such as those commonly used to clean food-processing equipment.
Salt Spray Tests
Superb Corrosion and Chemical Resistance
Corrosion resistance (rust resistance ) | Salt Spray Tests | ||
---|---|---|---|
General-use roller chain | Previous Neptune | Upgraded Neptune | |
After 10 hours |
After 1000 hours |
After 1000 hours |
- The upgraded chain has extra corrosion resistance. (Highly corrosive environment testing carried out in accordance with JIS-Z-2371 salt spray test. )
- The rollers have the same coating as the plates, pins, and bushes.
Chemical resistance | Immersed in 1,000 ppm sodium hypochlorite solution | Salt spray test after being immersed in 5% sodium hydroxide solution |
---|---|---|
Upgraded Neptune | Upgraded Neptune | |
After 2000 hours |
|
- Corrosion resistance to sodium hypochlorite solution is on a par with the previous Neptune chain. (The above shows the result of an immersion test in sodium hypochlorite solution. )
- We used a proprietary method to evaluate chemical resistance to a sodium hydroxide solution.
- Chemical resistance is equal to or better than the previous Neptune chain. (The above shows the result of undergoing 65 hours of a salt spray test after being immersed in a chemical solution for 45 hours. )
New Surface Treatment
- Newly developed by Tsubaki
- A new surface treatment combining a special coating and a special resin coating gives superb resistance to corrosion, rust, and chemicals.
No loss of strength
NEP series Neptune chain uses a special treatment process that does not affect chain strength (or the hardness of the components).
It has the same tensile strength and allowable load as our standard steel chains.
Package | Standard package | NEP Series | Zinc chromate compound coating | NP Series |
Stainless
SS Series |
---|---|---|---|---|---|
Min. tensile strength | 17.7 {1800} | 17.7 {1800} | 16.6 {1690} Note | 17.7 {1800} | - |
Max. allowable load | 3.63 {370} | 3.63 {370} | - | 3.04 {310} | 0.69 {70} |
Less environmental load
Surface Treated Neptune Chain uses no harmful hexavalent chromium in its corrosion resistant surface treatment, nor any other hazardous substances such as lead, cadmium, mercury, or arsenic. Neptune chains are RoHS compliant.
- RoHS
- RoHS is a directive issued by the European Union limiting the use of specified hazardous substances in electronics or electrical equipment.
Neptune Chain Applications
Automated Warehouse
Used on a stacker crane for mushroom cultivation in a high-temperature, high-humidity environment.
Standard steel chain quickly corroded and suffered wear, while stainless steel chain would be too large. So the customer chose the NEP series.
Drive unit of sheet transport equipment
Used to drive the roller section for transporting wet sheets.
This usage environment is extremely humid, with water droplets from the sheets falling onto the chain. The customer adopted a general-purpose chain, but the environment was more corrosive than expected and corrosion became a problem.
The NEP series has the same power transmission capacity as general-purpose chain, but also offers superb corrosion resistance. By choosing NEP series chain, the customer was able to solve corrosion problems without having to modify their equipment.
Washing machine
Used on equipment to wash and clean pouches packed with food.
The chain is used to convey heavy items and is exposed to large amounts of wash water.
The customer had been using stainless steel chain from another company, but they had to frequently replace the chain when it became elongated due to wear.
The NEP series has superb corrosion resistance and the same level of wear resistance as heat-treated chains. By choosing NEP series chain, the customer was able to cut down on running costs and raise operational efficiency.
Fruit sorter
Used on a sorter to swiftly and efficiently sort large amounts of fruit.
When customers choose equipment, one of the key criteria they consider is chain quality.
The NEP series has the reliably excellent qualities you expect of Tsubaki-branded chain, such as uniform length and superb performance with regard to wear elongation. It also boasts high corrosion resistance in cleaning environments. By choosing NEP series chain, the customer enjoyed a shorter equipment delivery time and stable operation.