Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X400-20 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting, double rod, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20
Dial in a precise forward stop on-site with the AirTAC MICJ40X400-20, a stainless-steel round-body mini cylinder featuring a 20 mm adjustable extend stroke. An external screw trims the extend end position down to 380 mm without swapping hardware, while a needle-set variable air cushion at both ends soaks up high-speed shock. This double-acting actuator delivers serious muscle, pushing with 628.3 N and pulling with 527.8 N at 0.5 MPa.
Built with a 16 mm piston rod and a 1/4" port, it handles operating pressures up to 1.0 MPa across a 30-800 mm/s speed range. The stainless barrel and rod resist mild corrosion and washdown environments. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20 |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting, double rod, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up 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)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 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 MICJ40X400-20
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -20 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -S | Optional 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 MICJ40X400-20 Is Used
Heavy Carton Diversion
Pushes heavy cartons at high speed on a packaging line, using the 20 mm extend stop to dial in the exact push distance and the dual air cushions to absorb impact without slamming.
Pallet Stopper Gate
Acts as a settable stop gate for heavy pallets, trimming the extend position by up to 20 mm to align with varying pallet widths while soaking up the kinetic energy.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20 the Right Cylinder?
The external stop screw and dual cushions shine in fast set-position moves where you must tune the extend end by up to 20 mm and control impact without adding external shock absorbers. Use LB foot, FA flange or TC trunnion mounts, as the SDB pivot-block is not available on this adjustable variant.
Remember that the stop screw sets the end position but acts as no mid-stroke lock. The air cushion only decelerates near the stroke end. A plain cylinder does not hold its load on air loss or when the valve is centred, so the piston will drift. For a securely held load, install an external rod lock or a pilot-operated check valve.
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)
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 MICJ40X400-20 FAQ
This 40 mm bore cylinder uses a 1/4" port. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 20 mm on-site, while a needle valve adjusts the air cushion at both ends to decelerate high-speed moves. This SKU has no magnet and cannot take CMSG/DMSG/EMSG sensors. The stainless build resists mild corrosion, and the cushion only decelerates near stroke end, never locking mid-stroke.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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