Airtac MIJ Adjustable Cylinder MIJ40X20-20S
The AirTAC MIJ Adjustable Cylinder MIJ40X20-20S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 20mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke20 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 MIJ40X20-20S
Dial in your forward end position on-site with the AirTAC MIJ40X20-20S, a round-body stainless mini cylinder featuring a 20 mm adjustable extend stroke. An external stop screw lets you shorten the forward movement by up to 20 mm to absorb setup tolerances, meaning one part number can cover several differing stop points without swapping hardware. Retract travel remains at the full 20 mm.
It uses a 1/4" air port and a male M12x1.25 rod thread. Because it carries the -S suffix, a built-in piston magnet enables position sensing with CMSG, DMSG, or EMSG switches. The cylinder relies on fixed TPU bumper pads to decelerate the stroke end.
Airtac MIJ Adjustable Cylinder MIJ40X20-20S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X20-20S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MIJ40X20-20S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MIJ40X20-20S Is Used
Precision Cut-off Stops
Trimming the extend stroke by up to 20 mm allows exact blade positioning for varying material lengths without reprogramming the machine cycle.
Is the Airtac MIJ Adjustable Cylinder MIJ40X20-20S the Right Cylinder?
This Ø40 bore provides substantial thrust, pushing 628.3 N and pulling 527.8 N at 0.5 MPa. When sizing both ways, stepping down to an MIJ32 drops the push force to 402.2 N, while no larger standard MIJ bore exists above 40 mm. The 20 mm external adjuster is ideal for changeover jobs where you need to tune the extend endpoint precisely.
Mounting options include LB foot, FA flange, and TC trunnion, but note that the SDB pivot-block is not available on this adjustable variant. The stop screw sets the forward end position but is not a mid-stroke lock; the piston will drift on air loss, so add an external rod lock or pilot check valve if you need to hold a suspended load.
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 MIJ40X20-20S FAQ
At 0.7 MPa, the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force at 1.0 MPa is 128.1 kgf.
An external stop screw shortens the extend stroke by up to 20 mm on-site, allowing you to set the exact forward end position without changing the cylinder; the retract stroke remains full. The -S suffix indicates a built-in piston magnet for use with 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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