Airtac MICJ Adjustable Mini Cylinder MICJ40X40-40S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X40-40S is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke40 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 MICJ40X40-40S
Shave up to 40 mm off the forward end position on site with the AirTAC MICJ40X40-40S, a round-body stainless steel mini cylinder built for double-acting service. An external stop screw dials in the extend endpoint without swapping hardware, while a needle-set variable air cushion at both ends soaks up high-speed shock. The stainless barrel and rod shrug off mild corrosion and washdown, and the built-in magnet (-S) supports CMSG, DMSG and EMSG switches.
The M12x1.25 male rod thread handles the load, and the adjustable cushion decelerates the piston near stroke end without acting as a mid-stroke lock.
Airtac MICJ Adjustable Mini Cylinder MICJ40X40-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X40-40S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MICJ40X40-40S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -40 | 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 MICJ40X40-40S Is Used
Heavy Part Ejection
Dial in a precise 20 mm extend stroke to eject 30 kg machined castings from a press, letting the dual air cushions absorb the impact at high speed.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X40-40S the Right Cylinder?
Choose this 40 mm model when you need to set a precise forward stop and control impact at high cycling speeds. Because the stop screw only trims the extend end and the air cushion merely decelerates, the piston will drift on air loss—specify an external rod lock or pilot check valve if you must hold a suspended load. Mount via LB foot, FA flange or TC trunnion (SDB is not offered on this adjustable variant), and rely on the -S magnet for position sensing.
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 MICJ40X40-40S FAQ
This 40 mm bore cylinder pushes 628.3 N and pulls 527.8 N at 0.5 MPa, and pushes 879.6 N / pulls 738.9 N at 0.7 MPa. The theoretical max force is 128.1 kgf at 1.0 MPa. It uses a 1/4" air port and a 16 mm piston rod with an M12x1.25 male thread.
An external stop screw shortens the extend stroke by up to 40 mm, and a needle valve adjusts the air cushion at both ends to decelerate high-speed moves. The cushion only slows the piston near the end of travel—it is not a brake. The cylinder does not hold position on air loss; use an external rod lock for suspended loads. The -S magnet enables CMSG, DMSG and EMSG sensors.
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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