Airtac MIJ Adjustable Cylinder MIJ40X400-50
The AirTAC MIJ Adjustable Cylinder MIJ40X400-50 is a genuine double acting, double rod, adjustable stroke 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
- 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 MIJ40X400-50
Dial in a precise forward end position on-site with the AirTAC MIJ40X400-50, a round-body stainless mini cylinder featuring a 50 mm extend adjustment window. An external stop screw lets you shorten the forward travel from its 400 mm nominal stroke down to 350 mm, absorbing setup tolerances without changing the installed unit. The retract stroke remains full length.
This Ø40 bore size operates outside the ISO 6432 mounting interface standard but retains a compact riveted construction. It uses a 1/4" port and an M12x1.25 male rod thread. Fixed TPU bumper pads decelerate the stroke ends, and because this specific SKU lacks the -S magnet option, it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ40X400-50 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X400-50 |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MIJ40X400-50
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -50 | 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 MIJ40X400-50 Is Used
Adjustable Pressing Fixture
Trim the 400 mm extend stroke down to 350 mm to set a precise lower pressing limit for light assembly tasks, relying on fixed TPU bumpers to soften the end impact.
Is the Airtac MIJ Adjustable Cylinder MIJ40X400-50 the Right Cylinder?
When sizing this actuator, consider the force boundaries of the MIJ family. If your application requires less push, stepping down to the Ø32 bore provides 402.2 N at 0.5 MPa; if you need more power, the Ø40 is the largest available bore in this series. The 50 mm external stop screw is ideal for changeover jobs or taking up mechanical tolerance, allowing one part number to cover several intermediate stops.
Remember that the stop screw sets the forward end position but acts purely as a physical stop, not a mid-stroke lock or brake. If your load must be held in place during air loss or when a valve is centered, the piston will drift, so you must add an external rod lock or a pilot-operated check valve. For mounting, you can utilize LB foot, FA flange, or TC trunnion brackets, but the SDB pivot block is not available on this adjustable variant.
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 MIJ40X400-50 FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 50 mm on-site, letting you fine-tune the forward end position without swapping cylinders; the retract stroke remains full. This screw is not a mid-stroke lock, so the piston will drift on air loss—use an external rod lock to hold a load. Note this SKU lacks a magnet, so it cannot accept position sensors.
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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.
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Most inquiries answered within 7-8 hours.
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