Airtac MIJ Adjustable Cylinder MIJ40X40-20S
The AirTAC MIJ Adjustable Cylinder MIJ40X40-20S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke40 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 MIJ40X40-20S
Dial in your forward end position on-site with the AirTAC MIJ40X40-20S, a round-body stainless steel mini cylinder featuring a 20 mm extend-stroke adjustment window. Rather than swapping components to hit a new stop, an external screw trims the forward travel down from the 40 mm nominal maximum, while retract remains full.
Built with a stainless-steel barrel and piston rod, the riveted construction resists mild corrosion and washdown environments. This Ø40 mm bore uses a 1/4" port and a Ø16 mm rod with an M12x1.25 male thread. Because this unit includes the -S magnet, it supports CMSG, DMSG, and EMSG position switches. Deceleration is handled by fixed TPU bumper pads, and the stop screw sets the endpoint rather than locking the piston mid-stroke.
Airtac MIJ Adjustable Cylinder MIJ40X40-20S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X40-20S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MIJ40X40-20S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MIJ40X40-20S Is Used
Heavy Clamping Fixtures
Apply up to 377 N of safe clamping force and use the 20 mm extend adjustment to dial in the exact material thickness without retooling the entire fixture.
Staged Diverting Gates
Handle cartons on a washdown line using the stainless build, fine-tuning the extend stop to accommodate different package widths on the fly.
Is the Airtac MIJ Adjustable Cylinder MIJ40X40-20S the Right Cylinder?
When sizing this actuator, check your force margins both ways. If you need more authority, this Ø40 is the largest available in the series, offering a theoretical maximum of 128.1 kgf at 1.0 MPa. The 20 mm adjustment window is ideal for taking up mechanical tolerances during setup or covering multiple staged feeds with a single part number.
Remember that this cylinder drifts on air loss, as the stop screw and fixed bumpers only set the end position and decelerate the stroke, not hold the load. For vertical or suspended loads, install an external rod lock or pilot check valve. Mounting options include LB foot, FA flange, and TC trunnion, 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 MIJ40X40-20S FAQ
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, letting you set the forward end position without changing the cylinder, while retract remains full. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors.
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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