Airtac MIJ Adjustable Cylinder MIJ40X400-40
The AirTAC MIJ Adjustable Cylinder MIJ40X400-40 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 MIJ40X400-40
Trimming the forward end by up to 40 mm via an external stop screw, this round-body stainless mini cylinder lets you dial in a 360-400 mm extend position on-site.
Built with a riveted stainless-steel barrel and a Ø16 mm piston rod, it handles mild washdown environments. It uses a 1/4" port and fixed TPU bumper pads for end-of-stroke deceleration. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ40X400-40 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X400-40 |
|---|---|
| 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 MIJ40X400-40
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 MIJ40X400-40 Is Used
Large Case Flap Folding
Drive a large carton flap folder where the exact 360-400 mm forward reach must be adjusted on the fly to accommodate varying box depths.
Pallet Stopper Arm
Act as a positive stop for pallets on a roller conveyor, relying on the stainless build for damp warehouse settings and the bumper pads to absorb impact.
Is the Airtac MIJ Adjustable Cylinder MIJ40X400-40 the Right Cylinder?
The 40 mm adjustment window is ideal for taking up mechanical tolerances during changeovers. Note that the stop screw sets the end position but acts as no mid-stroke lock—the piston will drift if air pressure drops. Use an external rod lock or pilot check valve for holding loads.
Mounting options include LB foot, FA flange, and TC trunnion brackets, along with CA, U, R, or CM back covers. The SDB pivot block is not available on this adjustable-stroke variant. To add position sensing, you must select the -S magnet version.
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 MIJ40X400-40 FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a male M12x1.25 rod thread.
An external stop screw shortens the extend stroke by up to 40 mm, letting you set a precise forward end position without changing the cylinder. It only trims the extend end; retract remains full. This SKU has no magnet and cannot take sensors, and the stop 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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