Airtac MIJ Adjustable Cylinder MIJ40X450-20
The AirTAC MIJ Adjustable Cylinder MIJ40X450-20 is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 450mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke450 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 MIJ40X450-20
Dialing in a precise forward end position on-site is effortless with this double-acting round-body mini cylinder, thanks to an external stop screw that shortens the extend stroke by up to 20 mm. Built with a stainless-steel barrel and piston rod, the riveted construction shrugs off mild corrosion and washdown environments. It delivers substantial power, pushing 628.3 N and pulling 527.8 N at 0.5 MPa.
This Ø40 mm non-ISO-6432 unit features a 1/4" port and a 16 mm rod with an M12x1.25 male thread. The retract stroke remains full, while fixed TPU bumper pads decelerate the piston at the ends. Note this SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ40X450-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X450-20 |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 450 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 MIJ40X450-20
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 MIJ40X450-20 Is Used
Bulk Bag Forming
Push rigid forming tubes into bulk packaging lines, relying on the stainless build for washdown resistance and the adjustable end position to fine-tune the fold depth.
Pallet Stopper Gate
Act as a high-force physical stop for incoming pallets, dialing in the extend position to accommodate different pallet footprints while using the fixed bumpers to absorb impact.
Is the Airtac MIJ Adjustable Cylinder MIJ40X450-20 the Right Cylinder?
If your application requires more power than this unit's theoretical maximum of 128.1 kgf at 1.0 MPa, you would need to step outside the MIJ mini cylinder family. The 20 mm adjustment window is ideal for taking up mechanical tolerances during setup or covering multiple intermediate stops without swapping cylinders.
Keep in mind the external screw only trims the forward extend position; it does not function as a mid-stroke lock or brake. If your load must be held during air loss, add an external rod lock or pilot check valve, as the piston will drift. For mounting, LB foot, FA flange, and TC trunnion brackets are available, but the SDB pivot block is not supported 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 MIJ40X450-20 FAQ
At 0.7 MPa, the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 20 mm on-site, allowing a usable forward range of 430-450 mm while retract remains full. This SKU does not include a magnet (-S), so it cannot accept CMSG, DMSG, or EMSG sensors. The screw sets the end position but 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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