• SMC CJ1 Miniature Air Cylinder (Bore 2.5 and 4 mm)
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SMC CJ1 Miniature Air Cylinder (Bore 2.5 and 4 mm)

SMC CJ1 Miniature Air Cylinder (Bore 2.5 and 4 mm)

SMC CJ1 series ultra-small stainless/brass air cylinder in 2.5 and 4 mm bore, double acting or single acting spring return, with integrated fitting for 4 mm tubing.

Key features

  • Double acting single rod (bore 4 mm) and single acting spring return / push type (bore 2.5 and 4 mm)
  • Basic mounting type with mounting nut and rod end nut
  • Rod cover fitting piping direction can be turned freely within +/-90 degrees (double acting)
  • Applicable tubing U4: polyurethane TU0425 or soft nylon TS0425 (OD 4 mm / ID 2.5 mm)
  • Non-lube operation, no cushion; brass tube with electroless nickel plating, stainless steel piston

Specifications

Fluid Air
Mounting Basic type
Proof pressure 1.05 MPa
Max. operating pressure 0.7 MPa
Min. operating pressure Double acting 0.2 MPa, single acting 0.3 MPa
Ambient and fluid temperature -10 to 70°C (no freezing)
Piston speed 50 to 500 mm/s
Cushion None
Stroke tolerance +0.5/0 mm
Lubrication Not required (non-lube)
Applicable tubing OD 4 mm / ID 2.5 mm (TU0425, TS0425)
Source SMC Korea catalog CJ1 Series (SMCKR_CJ1.pdf), p. 33-37 (PDF p. 1-5)
CJ1B4-5U4 Action: Double acting | Bore: 4 mm | Stroke: 5 mm
CJ1B4-10U4 Action: Double acting | Bore: 4 mm | Stroke: 10 mm
CJ1B4-15U4 Action: Double acting | Bore: 4 mm | Stroke: 15 mm
CJ1B4-20U4 Action: Double acting | Bore: 4 mm | Stroke: 20 mm
CJ1B2-5SU4 Action: Single acting, spring return | Bore: 2.5 mm | Stroke: 5 mm
CJ1B2-10SU4 Action: Single acting, spring return | Bore: 2.5 mm | Stroke: 10 mm
CJ1B4-5SU4 Action: Single acting, spring return | Bore: 4 mm | Stroke: 5 mm
CJ1B4-10SU4 Action: Single acting, spring return | Bore: 4 mm | Stroke: 10 mm
CJ1B4-15SU4 Action: Single acting, spring return | Bore: 4 mm | Stroke: 15 mm
CJ1B4-20SU4 Action: Single acting, spring return | Bore: 4 mm | Stroke: 20 mm
Round Body CylindersSMC
10 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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SMC CJ1 Miniature Air Cylinder (Bore 2.5 and 4 mm)

Brand SMC·Round Body Cylinders

Available part numbers (10)

CJ1B4-5U4, CJ1B4-10U4, CJ1B4-15U4, CJ1B4-20U4, CJ1B2-5SU4, CJ1B2-10SU4, CJ1B4-5SU4, CJ1B4-10SU4, CJ1B4-15SU4, CJ1B4-20SU4

How to order

Send the SMC 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
CJ1B4-5U4Action: Double acting | Bore: 4 mm | Stroke: 5 mm
CJ1B4-10U4Action: Double acting | Bore: 4 mm | Stroke: 10 mm
CJ1B4-15U4Action: Double acting | Bore: 4 mm | Stroke: 15 mm
CJ1B4-20U4Action: Double acting | Bore: 4 mm | Stroke: 20 mm
CJ1B2-5SU4Action: Single acting, spring return | Bore: 2.5 mm | Stroke: 5 mm
CJ1B2-10SU4Action: Single acting, spring return | Bore: 2.5 mm | Stroke: 10 mm
CJ1B4-5SU4Action: Single acting, spring return | Bore: 4 mm | Stroke: 5 mm
CJ1B4-10SU4Action: Single acting, spring return | Bore: 4 mm | Stroke: 10 mm
CJ1B4-15SU4Action: Single acting, spring return | Bore: 4 mm | Stroke: 15 mm
CJ1B4-20SU4Action: Single acting, spring return | Bore: 4 mm | Stroke: 20 mm

Need a different model, or a part not listed here? Send us your parts list →

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