Outboard Roller Chains

  • Outboard Roller Chains are Free Flow Chains with longer pins than Double Pitch or RS Chains and freely rotating outboard rollers attached.
  • Tsubaki offers a selection of standard series chains as well as Lambda Series (lube-free), SS Series (stainless steel), Poly Steel Series, and NP Series (electroless nickel plated).
  • Refer to the table below for combinations of outboard rollers and base chain rollers.

List of products

※ Click the model No. for detailed information.

※ Please refer to the Selection Guide for features and applications of each specifications.

Base chain Base chain
roller
Plastic outboard rollers Plastic outboard rollers with brakes Steel outboard rollers Max. allowable tension
kN{kgf}
Pitch
mm
Roller dia.
mm
Inner width
of inner link
mm
Plastic
rollers
Electroconductive
rollers
KV
rollers
Plastic rollers
with brakes
Electroconductive rollers
with spring brakes
Steel
roller
Stainless
steel roller
Lambda
Rollers
Standard Series Double Pitch steel RF2040S-SRP RF2040S-SRPE --- RF2040S-SRPB RF2040S-SRPBE RF2040S-SR --- RF2040S-SRLM 2.65{270} 25.4 7.92 7.95
RF2050S-SRP RF2050S-SRPE --- RF2050S-SRPB RF2050S-SRPBE RF2050S-SR --- RF2050S-SRLM 4.31{440} 31.75 10.16 9.53
RF2060S-SRP RF2060S-SRPE --- RF2060S-SRPB RF2060S-SRPBE RF2060S-SR --- RF2060S-SRLM 6.28{640} 38.1 11.91 12.7
RF2080S-SRP --- --- --- --- RF2080S-SR --- RF2080S-SRLM 10.7{1090} 50.8 15.88 15.88
RF2100S-SRP --- --- --- --- RF2100S-SR --- --- 17.1{1740} 63.5 19.05 19.05
RF2040R-SRP RF2040R-SRPE --- RF2040R-SRPB RF2040R-SRPBE RF2040R-SR --- RF2040R-SRLM 2.65{270} 25.4 15.88 7.95
RF2050R-SRP RF2050R-SRPE --- RF2050R-SRPB RF2050R-SRPBE RF2050R-SR --- RF2050R-SRLM 4.31{440} 31.75 19.05 9.53
RF2060R-SRP RF2060R-SRPE --- RF2060R-SRPB RF2060R-SRPBE RF2060R-SR --- RF2060R-SRLM 6.28{640} 38.1 22.23 12.7
Engineering plastic RF2040RP-SRP RF2040RP-SRPE --- RF2040RP-SRPB RF2040RP-SRPBE RF2040RP-SR --- --- 0.44{45} 25.4 15.88 7.95
RF2050RP-SRP RF2050RP-SRPE --- RF2050RP-SRPB RF2050RP-SRPBE RF2050RP-SR --- --- 0.69{70} 31.75 19.05 9.53
RF2060RP-SRP RF2060RP-SRPE --- RF2060RP-SRPB RF2060RP-SRPBE RF2060RP-SR --- --- 1.03{105} 38.1 22.23 12.7
RF2080RP-SRP RF2080RP-SRPE --- RF2080RP-SRPB RF2080RP-SRPBE RF2080RP-SR --- --- 1.77{180} 50.8 28.58 15.88
RF2100RP-SRP RF2100RP-SRPE --- RF2100RP-SRPB RF2100RP-SRPBE RF2100RP-SR --- --- 2.55{260} 63.5 39.69 19.05
RS steel RS40-SRP RS40-SRPE --- RS40-SRPB RS40-SRPBE RS40-SR --- RS40-SRLM 2.65{270} 12.70 7.92 7.95
RS50-SRP RS50-SRPE --- RS50-SRPB RS50-SRPBE RS50-SR --- RS50-SRLM 4.31{440} 15.875 10.16 9.53
RS60-SRP RS60-SRPE --- RS60-SRPB RS60-SRPBE RS60-SR --- RS60-SRLM 6.28{640} 19.05 11.91 12.70
RS80-SRP --- --- --- --- RS80-SR --- RS80-SRLM 10.7{1090} 25.40 15.88 15.88
RS100-SRP --- --- --- --- RS100-SR --- --- 17.1{1740} 31.75 19.05 19.05
Lambda Series
※1
Double Pitch steel RF2040S-LMC-SRP RF2040S-LMC-SRPE --- RF2040S-LMC-SRPB RF2040S-LMC-SRPBE RF2040S-LMC-SR --- RF2040S-LMC-SRLM 2.65{270} 25.4 7.92 7.95
RF2050S-LMC-SRP RF2050S-LMC-SRPE --- RF2050S-LMC-SRPB RF2050S-LMC-SRPBE RF2050S-LMC-SR --- RF2050S-LMC-SRLM 4.31{440} 31.75 10.16 9.53
RF2060S-LMC-SRP RF2060S-LMC-SRPE --- RF2060S-LMC-SRPB RF2060S-LMC-SRPBE RF2060S-LMC-SR --- RF2060S-LMC-SRLM 6.28{640} 38.1 11.91 12.7
RF2080S-LMC-SRP --- --- --- --- RF2080S-LMC-SR --- --- 10.7{1090} 50.8 15.88 15.88
RF2040R-LMC-SRP RF2040R-LMC-SRPE --- RF2040R-LMC-SRPB RF2040R-LMC-SRPBE RF2040R-LMC-SR --- RF2040R-LMC-SRLM 2.65{270} 25.4 15.88 7.95
RF2050R-LMC-SRP RF2050R-LMC-SRPE --- RF2050R-LMC-SRPB RF2050R-LMC-SRPBE RF2050R-LMC-SR --- RF2050R-LMC-SRLM 4.31{440} 31.75 19.05 9.53
RF2060R-LMC-SRP RF2060R-LMC-SRPE --- RF2060R-LMC-SRPB RF2060R-LMC-SRPBE RF2060R-LMC-SR --- RF2060R-LMC-SRLM 6.28{640} 38.1 22.23 12.7
Engineering plastic RF2040RP-LMC-SRP RF2040RP-LMC-SRPE --- RF2040RP-LMC-SRPB RF2040RP-LMC-SRPBE RF2040RP-LMC-SR --- --- 0.44{45} 25.4 15.88 7.95
RF2050RP-LMC-SRP RF2050RP-LMC-SRPE --- RF2050RP-LMC-SRPB RF2050RP-LMC-SRPBE RF2050RP-LMC-SR --- --- 0.69{70} 31.75 19.05 9.53
RF2060RP-LMC-SRP RF2060RP-LMC-SRPE --- RF2060RP-LMC-SRPB RF2060RP-LMC-SRPBE RF2060RP-LMC-SR --- --- 1.03{105} 38.1 22.23 12.7
RS steel RS40-LMC-SRP RS40-LMC-SRPE --- RS40-LMC-SRPB RS40-LMC-SRPBE RS40-LMC-SR --- RS40-LMC-SRLM 2.65{270} 12.70 7.92 7.95
RS50-LMC-SRP RS50-LMC-SRPE --- RS50-LMC-SRPB RS50-LMC-SRPBE RS50-LMC-SR --- RS50-LMC-SRLM 4.31{440} 15.875 10.16 9.53
RS60-LMC-SRP RS60-LMC-SRPE --- RS60-LMC-SRPB RS60-LMC-SRPBE RS60-LMC-SR --- RS60-LMC-SRLM 6.28{640} 19.05 11.91 12.70
RS80-LMC-SRP --- --- --- --- RS80-LMC-SR --- --- 10.7{1090} 25.4 15.88 15.88
SS Series
(18-8SUS
stainless steel)
※2
Double Pitch Stainless RF2040S-SS-SRP RF2040S-SS-SRPE RF2040S-SS-SRPKV RF2040S-SS-SRPB RF2040S-SS-SRPBE --- RF2040S-SS-SR --- 0.44{45} 25.4 7.92 7.95
RF2050S-SS-SRP RF2050S-SS-SRPE RF2050S-SS-SRPKV RF2050S-SS-SRPB RF2050S-SS-SRPBE --- RF2050S-SS-SR --- 0.69{70} 31.75 10.16 9.53
RF2060S-SS-SRP RF2060S-SS-SRPE RF2060S-SS-SRPKV RF2060S-SS-SRPB RF2060S-SS-SRPBE --- RF2060S-SS-SR --- 1.03{105} 38.1 11.91 12.7
RF2080S-SS-SRP --- --- --- --- --- RF2080S-SS-SR --- 1.77{180} 50.8 15.88 15.88
RF2100S-SS-SRP --- --- --- --- --- RF2100S-SS-SR --- 2.55{260} 63.5 19.05 19.05
RF2040R-SS-SRP RF2040R-SS-SRPE --- RF2040R-SS-SRPB RF2040R-SS-SRPBE --- RF2040R-SS-SR --- 0.44{45} 25.4 15.88 7.95
RF2050R-SS-SRP RF2050R-SS-SRPE --- RF2050R-SS-SRPB RF2050R-SS-SRPBE --- RF2050R-SS-SR --- 0.69{70} 31.75 19.05 9.53
RF2060R-SS-SRP RF2060R-SS-SRPE --- RF2060R-SS-SRPB RF2060R-SS-SRPBE --- RF2060R-SS-SR --- 1.03{105} 38.1 22.23 12.7
Engineering plastic RF2040RP-SS-SRP RF2040RP-SS-SRPE --- RF2040RP-SS-SRPB RF2040RP-SS-SRPBE --- RF2040RP-SS-SR --- 0.44{45} 25.4 15.88 7.95
RF2050RP-SS-SRP RF2050RP-SS-SRPE --- RF2050RP-SS-SRPB RF2050RP-SS-SRPBE --- RF2050RP-SS-SR --- 0.69{70} 31.75 19.05 9.53
RF2060RP-SS-SRP RF2060RP-SS-SRPE --- RF2060RP-SS-SRPB RF2060RP-SS-SRPBE --- RF2060RP-SS-SR --- 1.03{105} 38.1 22.23 12.7
RF2080RP-SS-SRP RF2080RP-SS-SRPE --- RF2080RP-SS-SRPB RF2080RP-SS-SRPBE --- RF2080RP-SS-SR --- 1.77{180} 50.8 28.58 15.88
RF2100RP-SS-SRP RF2100RP-SS-SRPE --- RF2100RP-SS-SRPB RF2100RP-SS-SRPBE --- RF2100RP-SS-SR --- 2.55{260} 63.5 39.69 19.05
RS Stainless RS40-SS-SRP RS40-SS-SRPE RS40-SS-SRPKV RS40-SS-SRPB RS40-SS-SRPBE --- RS40-SS-SR --- 0.44{45} 12.70 7.92 7.95
RS50-SS-SRP RS50-SS-SRPE RS50-SS-SRPKV RS50-SS-SRPB RS50-SS-SRPBE --- RS50-SS-SR --- 0.69{70} 15.875 10.16 9.53
RS60-SS-SRP RS60-SS-SRPE RS60-SS-SRPKV RS60-SS-SRPB RS60-SS-SRPBE --- RS60-SS-SR --- 1.03{105} 19.05 11.91 12.70
RS80-SS-SRP --- --- --- --- --- RS80-SS-SR --- 1.77{180} 25.40 15.88 15.88
RS100-SS-SRP --- --- --- --- --- RS100-SS-SR --- 2.55{260} 31.75 19.05 19.05
Poly Steel Chain Plastic RS40-PC-SRP RS40-PC-SRPE --- RS40-PC-SRPB RS40-PC-SRPBE --- --- --- 0.44{45} 12.70 7.92 7.95
RS50-PC-SRP RS50-PC-SRPE --- RS50-PC-SRPB RS50-PC-SRPBE --- --- --- 0.69{70} 15.875 10.16 9.53
RS60-PC-SRP RS60-PC-SRPE --- RS60-PC-SRPB RS60-PC-SRPBE --- --- --- 0.88{90} 19.05 11.91 12.70

Notes
 1. For the sake of convenience, the base chain is the part of the chain with the outboard rollers removed.
 2. *1 Steel outboard rollers require additional lubrication, even if the base chain is Lambda Chain.
 3. *2 Only the pin attaching the outboard rollers to the chain is precipitation hardened stainless steel.
 4. Brakes used with electroconductive rollers and when the base chain is NP Series are spring brakes.
 5. Base chain rollers are S-rollers when KV Series outboard rollers are used.

Base chain

1. Standard Series

We offer steel rollers (S- and R-rollers) and plastic R-rollers for the base chain. RS Chain uses steel rollers, while Double Pitch Chain can use steel or plastic R-rollers.

Steel roller

・ All parts are steel that has been heat treated for hardness.
・ Operating temperature range: -10oC to 150oC.
・ Requires additional lubrication


With plastic R-rollers (for Double Pitch Chain only)

・ The R-roller of the base chain is engineering plastic.
・ Performance with plastic R-rollers.
       Lightweight (30% lighter than steel chains)
       Quiet (5-7dB quieter than steel chains)
      Running resistance (30% less running resistance
       than steel chains)
       Roller color: White
       Operating temperature range: -10oC to 80oC.
      *The area between pins and bushes must generally
       be lubricated.

2. Lambda Series (lube-free)

The base chain's bushes are oil-impregnated sintered bushes and can be used without additional lubrication. (Steel outboard rollers require lubrication.)

While the allowable load is the same as with standard series, the inner and outer plates have been treated with black oxide for identification purposes.

Operating temperature range: -10oC to 150oC.

Avoid use around chemicals or in water, or in washing/degreasing applications.

Note: Only available up to RF2060.

3. SS Series (Stainless Steel Series)

Available with stainless steel R- and S-rollers or plastic R-rollers. S-rollers for RS Chain and Double Pitch Chain use steel rollers, while R-rollers for Double Pitch Chain use both steel and plastic rollers.

Stainless steel rollers

・ All parts except for the pin are 18-8SUS (SUS304 equivalent). (Pins are precipitation hardened stainless steel.)
・ Operating temperature range: -20oC to 400oC
・ Requires additional lubrication

With plastic R-rollers (for Double Pitch Chain only)

・ The R-roller of the base chain is engineering plastic, while the pins are precipitation hardened stainless steel.
・ Performance with plastic R-rollers.
       Lightweight (30% lighter than steel chains)
       Quiet (5-7dB quieter than steel chains)
      Running resistance (30% less running resistance
       than steel chains)
       Roller color: White
       Operating temperature range: -10oC to 80oC.
      *The area between pins and bushes must generally
       be lubricated.

4. Poly Steel Chain

Made with engineering plastic inner links and 18-8SUS (SUS304 equivalent) for the outer links. (Pins are precipitation hardened stainless steel.)

Lube-free, corrosion resistant.

Lightweight (50% lighter than steel chains)

Quiet (5dB quieter than steel chains)

Links: White

Operating temperature range: -20oC to 80oC

No offset links available.

5. NP Series

Nickel plating available for Standard and Lambda Series

No. of links per unit

Chains with outboard rollers are shipped in unit lengths (length of one chain) unless otherwise specified.

Chain size No. of links per unit Chain size No. of links per unit
RF2040120RS40240
RF205096RS50192
RF206080RS60160
RF208060RS80120
RF210048RS10096

Outboard roller specifications

1. Engineering plastic roller

Plastic roller

・ Material: Polyacetal (white)

・ Operating temperature range: -20oC to 80oC

Plastic brake roller

・ Material: Special engineering plastic (brown)

・ Operating temperature range: -20oC to 80oC

・ Braking performance ensured thanks to special engineering plastic with a large coefficient of friction. Enables quick start ups.

Electroconductive rollers

・ Material: Special engineering plastic (black)

・ Operating temperature range: -20oC to 80oC

・ Volume resistivity: 106Ω・cm

※ Only available up to RF2060.

KV rollers

・ Material: Super engineering plastic (black)

・ Operating temperature range: -20oC to 180oC

・ Provides excellent heat, chemical, and flammability resistance, conforms to food sanitation laws.

※ Only available up to RF2060.

2. Steel roller

Steel roller

・ Material: Hardened steel

・ Operating temperature range: -10oC to 150oC.

・ Lubrication required

Stainless steel roller

・ Material: 18-8SUS (SUS304 equivalent)

・ Operating temperature range: -20oC to 400oC

・ Lubrication required

Lambda Rollers

・ Material: Steel

・ Operating temperature range: -10oC to 150oC.

・ Additional lubrication: Not required

※ Requires additional lubrication when base chains are standard series.

Attachment positioning of outboard rollers

1. When staggered

The diagram shows an example of outboard rollers attached every link in a staggered pattern.

Plastic brake rollers used when rollers are attached in a staggered pattern every link are normally attached every three links (as per the diagonal line in the diagram).

2. When attached in a crosswise pattern.

The diagram shows an example of outboard rollers attached every two links in a crosswise pattern. When the base chain is an RF chain, outboard rollers can be attached every link (every two links for RS chain).

Plastic brake rollers used when rollers are attached in a crosswise pattern every two links are normally attached every six links (as per the diagonal line in the diagram).

Sprocket

Double Pitch Chain with outboard rollers

All Double Pitch Chain with outboard rollers can use sprockets for Double Pitch Chain.

When using RS sprockets, only S-rollers can be used, and the sprocket must have 30T or more.

RS Chain with outboard rollers

RS sprockets with small numbers of teeth (the gray shaded area below) cannot be used with outboard rollers because they contact the hub.

When using RS sprockets with small numbers of teeth, finish the hub diameter as per the chart below, or use as is with larger numbers of teeth.

Chain size Number of teeth
91011121314151617181920212223
RS40202428323640444852566064687276
RS5026313641465156616671
RS603238445056
RS80447692
RS100627281