Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X400-20S 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 MICJ40X400-20S
Dial in a precise forward stop on-site with the AirTAC MICJ40X400-20S, a stainless-steel round-body mini cylinder featuring a 20mm adjustable extend stroke and a built-in magnet. An external stop screw lets you trim the extend end position down from the 400mm nominal maximum without swapping hardware, while a needle-set variable air cushion at both ends soaks up high-speed shock. The retract stroke remains full length.
The stainless barrel and rod resist mild corrosion and washdown environments. Because the -S suffix denotes an integrated piston magnet, you can directly mount CMSG, DMSG, or EMSG sensors for position detection. Note that the cushion only decelerates the piston near the stroke end and the stop screw sets the end position; neither acts as a mid-stroke lock.
Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20S |
|---|---|
| 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 MICJ40X400-20S
| 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 MICJ40X400-20S Is Used
Large Case Flapping
Closes heavy corrugated cartons where the forward end position needs on-site tuning; the needle cushion absorbs the impact of the 16mm rod at fast cycle speeds.
Vertical Lift Gate
Raises a 30kg access panel using the 0.5MPa push force, using the built-in magnet to trigger DMSG sensors at the precise trimmed extend position.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20S the Right Cylinder?
When sizing this 40mm bore, consider the force boundaries. The stop screw sets the forward end point perfectly, while the cushions absorb the kinetic energy of heavy loads.
For mounting, you can use LB foot, FA flange, or TC trunnion brackets, plus CA, U, R, or CM back covers, but the SDB pivot-block is not available on this adjustable variant. If your application requires the load to hold position during air loss, do not rely on the cushion or stop screw; add an external rod lock or pilot-operated check valve, as the piston will drift. The -S magnet enables CMSG, DMSG, and EMSG switches for exact tracking.
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 MICJ40X400-20S FAQ
This 40mm bore cylinder uses a 1/4" port. The theoretical maximum force is 128.1kgf at 1.0MPa.
An external screw shortens the extend stroke by up to 20mm on-site, while the retract remains full. Needle valves adjust the air cushion at both ends to decelerate high-speed impacts. The -S indicates a built-in magnet for CMSG, DMSG, or EMSG sensors. The stop screw and cushion only manage end-of-stroke motion; they do not lock the piston 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.
Related AirTAC MICJ Cylinders
Request a Quote for Airtac MICJ Adjustable Mini Cylinder MICJ40X400-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.