Airtac MIJ Adjustable Cylinder MIJ40X25-20S
The AirTAC MIJ Adjustable Cylinder MIJ40X25-20S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM12×1.25
- 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 MIJ40X25-20S
Trimming the forward end by up to 20 mm via an external stop screw, this double-acting round-body mini cylinder lets you dial in the exact extend position from 5 to 25 mm without swapping parts. The Ø40 bore delivers substantial power, pushing with 628.3 N and pulling with 527.8 N at 0.5 MPa, while the stainless-steel barrel and rod shrug off mild corrosion and washdown environments.
Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position sensing. It uses a 1/4" port and a Ø16 rod with an M12x1.25 male thread.
Airtac MIJ Adjustable Cylinder MIJ40X25-20S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X25-20S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| 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 | 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. 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 MIJ Adjustable Cylinder MIJ40X25-20S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MIJ40X25-20S Is Used
Staged Diverting
Set precise extend lengths to divert heavy cartons on a washdown line, relying on the stainless steel construction and 1/4" port for robust airflow.
Is the Airtac MIJ Adjustable Cylinder MIJ40X25-20S the Right Cylinder?
The 20 mm adjustment window is ideal for taking up mechanical tolerances during setup or covering multiple stop points with one part number.
Keep in mind the stop screw only sets the extend end position; it is not a mid-stroke lock. The piston will drift on air loss, so use an external rod lock or pilot check valve for holding suspended loads. Mount via LB foot, FA flange, or TC trunnion (SDB pivot-block is not available on this adjustable variant), and rely on the fixed TPU bumper pads to decelerate the stroke end across the 30-800 mm/s speed range.
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 MIJ40X25-20S FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa it pushes with 879.6 N and pulls with 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a Ø16 rod.
An external stop screw shortens the extend stroke by up to 20 mm on site, giving a usable forward range of 5 to 25 mm; the retract stroke remains full. The -S suffix means a piston magnet is built-in for CMSG, DMSG, or EMSG sensors. The fixed TPU bumpers decelerate the stroke end, but the screw is not a mid-stroke lock.
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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