Airtac MIJ Adjustable Cylinder MIJ25X40-20S
The AirTAC MIJ Adjustable Cylinder MIJ25X40-20S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø25mm bore and 40mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface fits standard ISO 6432 mini-cylinder mounting interfaces.
- BoreØ25 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
- 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 MIJ Adjustable Cylinder MIJ25X40-20S
Dial in your forward end position on the fly with the AirTAC MIJ25X40-20S, a round-body stainless steel mini cylinder built for double-acting operation. An external stop screw lets you shorten the extend stroke by up to 20 mm directly on the machine, providing a usable forward range of 20 to 40 mm without swapping parts. The retract stroke remains full length, and the screw simply sets the end stop rather than acting as a mid-stroke lock.
The stainless barrel and rod resist mild corrosion and washdown environments. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position sensing. Pneumatic connections use a 1/8" port, and fixed TPU bumper pads absorb shock at the stroke ends.
Airtac MIJ Adjustable Cylinder MIJ25X40-20S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ25X40-20S |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 | Fixed TPU bumper pads |
| 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.
Theoretical Output Force (Ø25mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 206 N |
| 0.7 MPa | 289 N |
| Max (@1.0 MPa) | 42 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 MIJ Adjustable Cylinder MIJ25X40-20S
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MIJ Adjustable Cylinder MIJ25X40-20S Is Used
Adjustable Transfer Diverter
Fine-tune the actuator's end position on the fly to route varying box sizes without changing hardware, relying on the 12.5 kg vertical lift capacity for reliable routing.
Variable Depth Carton Sealer
Set the precise extend length for different flap depths using the external screw, using the fixed TPU bumpers to soften the final impact on the 25 mm rod.
Is the Airtac MIJ Adjustable Cylinder MIJ25X40-20S the Right Cylinder?
The 20 mm adjustment window is ideal for taking up mechanical tolerances or matching multiple part stops during changeovers. Remember that a standard cylinder drifts on air loss; the stop screw sets the end position but does not lock the load mid-stroke. For holding a suspended load, add an external rod lock or pilot check valve.
This adjustable-stroke variant supports LB foot, FA flange, and TC trunnion mounts, but the SDB pivot block is not available. The built-in -S magnet enables CMSG, DMSG, and EMSG sensors, whereas a non-S SKU cannot accept them.
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 MIJ Adjustable Cylinder MIJ25X40-20S FAQ
The theoretical maximum force is 50 kgf at 1.0 MPa. The air port size is 1/8".
An external screw shortens the extend stroke by up to 20 mm on-site, giving a usable forward range of 20-40 mm while retract remains full. The -S designation means a piston magnet is built-in for CMSG, DMSG, or 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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