Airtac MIJ Adjustable Cylinder MIJ40X80-20S
The AirTAC MIJ Adjustable Cylinder MIJ40X80-20S is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke80 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 MIJ40X80-20S
Dial in your forward end position on-site with the AirTAC MIJ40X80-20S, a round-body stainless steel mini cylinder that lets you shorten the extend stroke by up to 20 mm via an external stop screw. The Ø16 mm piston rod and M12x1.25 male thread handle robust loads, while the 1/4" port ensures adequate air flow for its 30-800 mm/s speed range.
The riveted stainless barrel and rod resist mild corrosion and washdown environments. Because this is a -S SKU, it includes a built-in piston magnet for CMSG, DMSG, or EMSG position sensing. Fixed TPU bumper pads decelerate the piston at the stroke ends. Note that this Ø40 bore is a non-ISO-6432 size, offering a larger round-body footprint for heavier tasks. The stop screw trims the extend end only; retract remains a full 80 mm stroke.
Airtac MIJ Adjustable Cylinder MIJ40X80-20S Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X80-20S |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MIJ40X80-20S
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MIJ40X80-20S Is Used
Heavy Diverter Gate
Set the exact extend stop for a heavy diverter arm on a packaging line, using the 20mm adjustment to route cartons without over-traveling.
Pallet Changeover Stop
Act as an adjustable physical end stop for different pallet widths, trimming the forward stroke by up to 20mm to handle mixed product sizes.
Is the Airtac MIJ Adjustable Cylinder MIJ40X80-20S the Right Cylinder?
The 20 mm adjustment window is ideal for taking up mechanical tolerances or staging feeds without swapping parts.
Mounting options include LB foot, FA flange, and TC trunnion brackets, plus CA, U, R, and CM back covers, but the SDB pivot block is not available on this adjustable variant. Remember that the external screw sets the forward end position but acts purely as a stop, not a mid-stroke lock. The cylinder will drift on air loss, so install 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 MIJ40X80-20S FAQ
Its theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external stop screw shortens the extend stroke by up to 20 mm on-site, while the retract stroke remains fixed at 80 mm. The -S suffix means it has a built-in piston magnet for CMSG, DMSG, and 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.
Request a Quote for Airtac MIJ Adjustable Cylinder MIJ40X80-20S
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