Airtac MIJ Adjustable Cylinder MIJ40X125-40S
The AirTAC MIJ Adjustable Cylinder MIJ40X125-40S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke125 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 MIJ40X125-40S
Dial in a precise forward end position from 85 to 125 mm without swapping hardware using the AirTAC MIJ40X125-40S. An external stop screw shortens the extend stroke by up to 40 mm on site, while the retract stroke remains full. This round-body stainless-steel mini cylinder is double-acting and features a built-in piston magnet for position sensing.
The Ø40 mm bore uses a 1/4" port and a Ø16 mm rod. Fixed TPU bumper pads decelerate the stroke ends, and the stainless barrel and rod resist mild corrosion in washdown environments.
Airtac MIJ Adjustable Cylinder MIJ40X125-40S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X125-40S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MIJ40X125-40S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MIJ Adjustable Cylinder MIJ40X125-40S Is Used
Staged Diverter Pusher
Fine-tune the 85-125 mm extend stop to route heavy cartons of varying widths on a packaging line without changing the actuator.
Tolerance Take-Up Clamp
Absorb part dimensional variance during heavy clamping by trimming the forward end position up to 40 mm on the fly.
Is the Airtac MIJ Adjustable Cylinder MIJ40X125-40S the Right Cylinder?
The 40 mm adjustment window is ideal for taking up mechanical tolerances during setup or staging feeds across changeover jobs. Remember that the stop screw sets the end position but does not lock the piston mid-stroke; if air pressure drops, the cylinder drifts. Use an external rod lock or pilot check valve to hold a load safely.
Mounting options include LB foot, FA flange, and TC trunnion brackets, plus CA, U, R, and CM back covers, but the SDB pivot block is not available for this adjustable variant. Because this SKU includes the -S magnet, you can directly mount CMSG, DMSG, or EMSG sensors for electronic or reed switch position feedback.
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 MIJ40X125-40S FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a Ø16 mm piston rod.
An external stop screw shortens the extend stroke by up to 40 mm, letting you set the forward end position between 85 and 125 mm; the retract stroke remains full. The screw is not a mid-stroke lock. The included -S magnet enables CMSG, DMSG, and EMSG sensors for position detection.
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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