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Surface Treated Neptune Chain Features and Applications

Upgraded for even better performance Neptune—Tsubaki's unique corrosion-resistant chain

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

Salt Spray Tests

Superb Corrosion and Chemical Resistance

Corrosion resistance (rust resistance ) Salt Spray Tests
General-use roller chain Previous Neptune Upgraded Neptune
Salt Spray Tests

After 10 hours

Salt Spray Tests

After 1000 hours

Salt Spray Tests

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
Immersed in 1,000 ppm sodium hypochlorite solution

After 2000 hours

Salt spray test after being immersed in 5% sodium hydroxide solution

 

  • 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.
Surface treatment

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.

Units :kN {kgf}
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}
Ref.: For RS40-size drive chain.  Note )Average tensile strength of other companies 'chains

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.
Less environmental load

Neptune Chain Applications

Automated Warehouse

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

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

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

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.

Neptune Series line-up

Neptune Series catalog