• Tsubaki RS120-SUP-1 Super Chain Heavy-Duty Roller Chain
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Tsubaki RS120-SUP-1 Super Chain Heavy-Duty Roller Chain

Tsubaki RS120-SUP-1 Super Chain Heavy-Duty Roller Chain

Tsubaki Super Chain — heavy-duty roller chain achieving up to 40% higher maximum allowable load than standard RS roller chain of the same size.

Key features

  • Thicker and wider plates with optimized mid-section curvature for compact design without sacrificing strength
  • Pin fatigue strength approx. 40% higher than standard RS chain
  • Excellent shock absorption
  • Can substitute one size down from standard RS chain
  • Base dimensions (pitch, roller dia, inner link width) identical to RS roller chain
  • Available in single strand; M-type and F-type connecting links

Specifications

Series RS120-SUP
Pitch 38.10 mm
Roller Diameter 22.23 mm
Inner Width 25.40 mm
Strands 1
Max Load +40% vs Standard RS120
Pin Fatigue Strength +40% vs Standard RS
Plate Thicker & Wider (optimized curvature)
Size Down Capable Yes (1 size smaller than RS equivalent)
Standard JIS B 1801 (same base dims as RS120)
Application Heavy-duty power transmission, high-shock machinery, compact drive design
RS120-SUP-1-M-U Series: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: M-Type Unit Link
RS120-SUP-1-F-U Series: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: F-Type Unit Link
RS120-SUP-1-MJL Series: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: M-Type Connecting Link (JL)
RS120-SUP-1-FJL Series: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: F-Type Connecting Link (JL)
RS120-SUP-1-4POL Series: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: Press-Fit Offset Link (4POL)
Roller ChainsTsubaki
5 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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Tsubaki RS120-SUP-1 Super Chain Heavy-Duty Roller Chain

Brand Tsubaki·Roller Chains

Available part numbers (5)

RS120-SUP-1-M-U, RS120-SUP-1-F-U, RS120-SUP-1-MJL, RS120-SUP-1-FJL, RS120-SUP-1-4POL

How to order

Send the Tsubaki part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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Product codeSpec
RS120-SUP-1-M-USeries: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: M-Type Unit Link
RS120-SUP-1-F-USeries: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: F-Type Unit Link
RS120-SUP-1-MJLSeries: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: M-Type Connecting Link (JL)
RS120-SUP-1-FJLSeries: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: F-Type Connecting Link (JL)
RS120-SUP-1-4POLSeries: RS120-SUP | Pitch: 38.10 mm | Roller Diameter: 22.23 mm | Inner Width: 25.40 mm | Strands: 1 | Max Load: +40% vs Standard RS120 | Pin Fatigue Strength: +40% vs Standard RS | Plate: Thicker & Wider (optimized curvature) | Size Down Capable: Yes (1 size smaller than RS equivalent) | Standard: JIS B 1801 (same base dims as RS120) | Application: Heavy-duty power transmission, high-shock machinery, compact drive design | Link Type: Press-Fit Offset Link (4POL)

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