Surface treated Lambda chain 　NP Series

Product photo
  • Coated Lambda Chain for additional corrosion resistance
  • Lambda Chain have a special nickel plating to increase corrosion resistance. (light rust prevention )

Features

  • ・Light corrosion resistance

    Plates and rollers have a special nickel plating for light corrosion resistance.

  • ・Beautiful appearance

    The appearance is beautiful by applying special nickel plating.

  • ・Improved lubricant of special oil-impregnated bush

    Used the compliant lubrication to NSF H1. It also can be used on food machinery.

    ＊NSF H1 is the standard regulated by NSF. This is "Lubricant ingredients are safe in the event of incidental food contact." oil.

  • ・Basic construction

    Drive Chain (Roller Chain) structure diagram

    ※The thickness of the inner plate is increased by one size to ensure strength such as tensile strength.
    Thus, pins are longer than with the RS Roller Chain, so interference with equipment should be checked.

When selecting sprocket specifications

It is necessary to select a sprocket specification that corresponds to the customer's operating environment and the chain specification used.

Dedicated sprockets are required for surface treated Lambda chain NP Series.

Please consult us for details.

Galvanic corrosion may occur when this chain is used with stainless steel sprockets, promoting premature roller wear.

Click here for the chain/sprocket compatibility table.

Chain/sprocket compatibility table

Catalogs ・Instruction Manuals

List of Models

※Click the name for more information.

※The table below includes related products. The model numbers of the products introduced on this page are colored.

Pitch
mm		 No. of
strands 		Size & Specification & No. of strands Roller dia.
mm		 Inner width
of inner link
mm
Lambda chain Surface-treated
Lambda Chain
NP Series 		Long-life
Lambda Chain 		Lambda Chain
cold resistant series 		Lambda Chain
KF Series 		Heavy-duty
Lambda Chain 		Heavy-duty
Lambda Chain NP Series
12.70 1 RS40-LMD-1 RS40-LMDNP-1 RS40-LMDX-1 RS40-LMDKT-1 RS40-LMDKF-1 --- --- 7.92 7.55
2 RS Double Strand
Compatible Series 		RS40-LMDS-2 --- --- --- --- --- ---
2 --- --- --- --- --- RS40-LMDH-2 RS40-LMDHNP-2
15.875 1 RS50-LMD-1 RS50-LMDNP-1 RS50-LMDX-1 RS50-LMDKT-1 RS50-LMDKF-1 --- --- 10.16 9.26
2 RS Double Strand
Compatible Series 		RS50-LMDS-2 --- --- --- --- --- ---
2 --- --- --- --- --- RS50-LMDH-2 RS50-LMDHNP-2
19.05 1 RS60-LMD-1 RS60-LMDNP-1 RS60-LMDX-1 RS60-LMDKT-1 RS60-LMDKF-1 --- --- 11.91 12.28
2 RS Double Strand
Compatible Series 		RS60-LMDS-2 --- --- --- --- --- ---
2 --- --- --- --- --- RS60-LMDH-2 RS60-LMDHNP-2
25.40 1 RS80-LMD-1 RS80-LMDNP-1 RS80-LMDX-1 RS80-LMDKT-1 RS80-LMDKF-1 --- --- 15.88 15.48
2 RS Double Strand
Compatible Series 		RS80-LMDS-2 --- --- --- --- --- ---
2 --- --- --- --- --- RS80-LMDH-2 RS80-LMDHNP-2
31.75 1 RS100-LMD-1 RS100-LMDNP-1 RS100-LMDX-1 RS100-LMDKT-1 --- --- --- 19.05 18.70
2 RS Double Strand
Compatible Series 		RS100-LMDS-2 --- --- --- --- --- ---
2 --- --- --- --- --- RS100-LMDH-2 RS100-LMDHNP-2
38.10 1 RS120-LMD-1 RS120-LMDNP-1 RS120-LMDX-1 --- --- --- --- 22.23 24.75
2 RS Double Strand
Compatible Series 		RS120-LMDS-2 --- --- --- --- --- ---
44.45 1 RS140-LMD-1 RS140-LMDNP-1 --- --- --- --- --- 25.40 24.75
2 RS Double Strand
Compatible Series 		RS140-LMDS-2 --- --- --- --- --- ---
50.80 1 RS160-LMD-1 --- --- --- --- --- --- 28.58 31.2
2 RS Double Strand
Compatible Series 		RS160-LMDS-2 --- --- --- --- --- ---

Point of cautions when considering and adopting Lambda chains

  • 1. Preventing contamination Lambda Chains have special nickel-plated pins and plates with black oxide treatment. Surface-treated Lambda Chains have different surface treatments for each series. Do not use Lambda Chain if the chain will come in direct contact with food, or where coating flakes or wear dust may contaminate food.
    In non-food applications, take measures to prevent entry of foreign matter, for example, installing an appropriate cover when used in environments where coating flakes or wear dust may present a problem.
    Though nickel is not subject to the Japan Food Sanitation Act or the Industrial Safety and Health Act, use the chain with caution.
  • 2. Lubricating oil used on products Depending on usage conditions, the lubricating oil contained in impregnated bushings may spatter.
    Due to manufacturing constraints, Lambda Chain uses certain oils that are not compliant with NSF H1 requirements.
    If a bushing runs out of impregnating oil, it should be quickly re-oiled, leading to a longer wear life.
  • 3. Operating environment If debris or dust is allowed to enter between chain parts, wear elongation may result and the chain may reach the end of its service life prematurely.
    Avoid using chains in a chemical, solvent, or degreasing medium, or in water or under vacuum in a way that may cause the lubricating oil impregnating the bushings to become depleted.
    Lambda Chain is not coated with anti-rust oil. Keep away from hot or humid places, and avoid dusty locations.
  • 4. Double-strand chain Double-strand Lambda Chain and Heavy Duty Lambda Chain (including Surface-treated Series and KF Series) have different transverse pitches compared to RS Roller Chain.
    Use dedicated sprockets instead of RS sprockets.
    RS Double-strand Compatible Lambda Chain has the same transverse pitch as RS Roller Chain. Double-strand RS sprockets may be used.
    Double-strand chains cannot be used together with LMD-2 and LMDS-2 chains, including their connecting components such as connecting links. The entire chain should be replaced and compatible sprockets selected.
  • 5. Checking for interference on the equipment side The length of pins for lube-free chains varies depending on the thickness of the outer and inner plates and the presence or absence of a felt seal.
    Since the pins extend beyond the RS roller chain itself, check for interference with equipment at the time of chain replacement.

Comparison of Wear Life in the High-Temperature Range  (Reference )

A roller chain’s wear life varies depending on the chain speed and load acting on it, the number of teeth on the sprocket, operating conditions and temperature, and so on.
The graphs below provide a rough guide to roller chain wear life.

※Note: Wear life for Lambda Chain is +0.5% elongation.

150℃Range
RS50 Size (in-house test comparison with no additional lubrication )

Wear life graph

230℃Range
RS50 Size (in-house test comparison with no additional lubrication )

Wear life graph
  • Note )1. The operating temperature range for Lambda Chain is -10℃ to 150℃.
  • 2. Chain temperature may rise to be higher than ambient temperature. Make sure that chain temperature does not exceed allowable operating temperature.
  • 3. Kilowatt ratings will drop to 3/4 of the listed catalog values when using in the 150℃ to 200℃ range. Select a chain to match your operating temperature.
  • 4. Kilowatt ratings will drop to 1/2 of the listed catalog values when using in the 200℃ to 230℃ range. Select a chain to match your operating temperature.