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AirTAC MICJ Series · Mini Cylinder

Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50

The AirTAC MICJ Adjustable Mini Cylinder MICJ40X100-50 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 100mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.

  • BoreØ40 mm
  • Stroke100 mm
  • Port size1/4"
  • Acting typeDouble acting, double rod, adjustable stroke + cushion
  • Rod threadM12×1.25
  • CushionVariable air cushion, both ends
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About the Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50

Trim the forward stop by up to 50 mm on site without swapping cylinders using the AirTAC MICJ40X100-50. This double-acting round-body mini cylinder pairs that external extend adjuster with a needle-set variable air cushion at both ends, letting you set the exact end position and soak up high-speed shock simultaneously.

Built with a stainless-steel barrel and Ø16 piston rod (M12x1.25 male thread), it resists mild corrosion and handles washdowns. It uses a 1/4" port and operates at 30-800 mm/s. Note this non-magnet SKU cannot take a sensor; the -S variant is required for CMSG/DMSG/EMSG switches.

Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50 Technical Specifications

ModelAirtac MICJ Adjustable Mini Cylinder MICJ40X100-50
SeriesMICJ mini cylinder
Bore sizeØ40 mm
Stroke100 mm
Acting typeDouble acting, double rod, adjustable stroke + cushion
Port size1/4"
Rod threadM12×1.25
FluidAir (filtered by 40µm element)
Operating pressure0.15 – 1.0 MPa
Proof pressure1.5 MPa
Temperature-20 to +70 °C
Speed range30 – 800 mm/s
CushionVariable air cushion, both ends
Max standard strokeUp to 500 mm

Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G. Note: the Ø40 bore is a larger, non-ISO-6432 size.

Theoretical Output Force (Ø40mm)

PressureForce (both ways)
0.5 MPa528 N
0.7 MPa739 N
Max (@1.0 MPa)108 kgf

MIJ / MICJ are double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).

Model Code: Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50

MICJround-body mini cylinder (adjustable-stroke, variable cushion).
40Bore size in mm.
×100Stroke length in mm.
-50Adjustable stroke window (mm the extend stroke can be shortened on site).
-SOptional built-in magnet for CMSG / DMSG / EMSG sensors.

MI-family variants: MI / MIC (double acting ±cushion), MSI / MTI (single acting push / pull), MID / MICD (double rod ±cushion), MIJ / MICJ (double rod, adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.

Where the Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50 Is Used

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High-Speed Diverting

Uses the adjustable air cushion to absorb shock during fast 30-800 mm/s diverting motions, preventing end-cap impact on heavy product lanes.

Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50 the Right Cylinder?

When sizing, the smaller Ø32 bore pushes 402.2 N at 0.5 MPa, while there is no larger MICJ option above Ø40. This 628.3 N model fits applications needing substantial force where you also need to dial in a precise extend position on the fly. The external screw shortens the extend end only; retract remains the full 100 mm.

The adjustable air cushion decelerates the load near the stroke end but does not function as a mid-stroke lock or brake. If the machine loses air, the piston will drift; use an external rod lock or pilot-operated check valve for held loads. Mount via LB foot, FA flange, or TC trunnion (SDB pivot-block is not available on this adjustable variant).

Quick checklist

  • ✓ Required force at your working pressure
  • ✓ Stroke and mounting space
  • ✓ Port/thread type (PT / G)
  • ✓ Magnet (-S) for sensors?
  • ✓ Back cover (CA/U/R/CM) & mount (LB/FA/SDB/TC)
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Installation & Maintenance Notes

  • check Use clean air filtered to 40µm or finer.
  • check Keep within 0.15 – 1.0 MPa operating pressure.
  • check Avoid side load on the piston rod.
  • check Do not dismantle the riveted front/back covers.
  • check Use correct back cover (CA/U/R/CM) & mount (LB/FA/SDB/TC).
  • check Installation by qualified personnel per AirTAC docs.

Airtac MICJ Adjustable Mini Cylinder MICJ40X100-50 FAQ

This Ø40 bore cylinder uses a 1/4" port.

An external screw shortens the extend stroke by up to 50 mm on site, while a needle valve adjusts the air cushion at both ends to decelerate high-speed moves. The cushion is not a brake, and the cylinder will drift on air loss; use a pilot check valve for load holding. This non-S SKU cannot take a sensor.

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Related AirTAC MICJ Cylinders

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