Airtac MIJ Adjustable Cylinder MIJ40X80-40
The AirTAC MIJ Adjustable Cylinder MIJ40X80-40 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 MIJ40X80-40
Dial in a precise forward end position on the fly with the AirTAC MIJ40X80-40, a round-body stainless mini cylinder built for double-acting operation. An external stop screw lets you shorten the extend stroke by up to 40 mm directly on the floor, meaning one part number can cover a range of forward stops from 40 to 80 mm without swapping hardware. Retract remains at the full 80 mm.
The stainless steel barrel and rod resist mild corrosion and washdown, while fixed TPU bumper pads decelerate the stroke ends. Note that this larger bore falls outside the ISO 6432 mounting standard, and because this SKU lacks the -S magnet, it cannot accept position sensors.
Airtac MIJ Adjustable Cylinder MIJ40X80-40 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X80-40 |
|---|---|
| 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 MIJ40X80-40
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MIJ40X80-40 Is Used
Heavy Clamping Fixtures
Secure heavy workpieces with up to 377 N of safe working force, using the 40 mm extend adjustment to dial in exact clamp depth for varying part tolerances.
Staged Diverting Gates
Actuate routing gates on a washdown line where the stainless build resists moisture, adjusting the push stroke on-site to handle different carton sizes without changing cylinders.
Is the Airtac MIJ Adjustable Cylinder MIJ40X80-40 the Right Cylinder?
When sizing this unit, consider the force curve: the MIJ40X80-40 pushes 628.3 N at 0.5 MPa, sitting above the Ø32 bore's 402.2 N and representing the top of the MIJ range with no larger standard bore available. The 40 mm adjustment window is ideal for taking up mechanical tolerances or staging feeds during changeovers, but remember the stop screw only sets the extend endpoint. It does not function as a mid-stroke lock, and the piston will drift if air pressure is lost. For load-holding safety, integrate an external rod lock or pilot check valve.
Mounting options include LB foot, FA flange, and TC trunnion styles, along with CA, U, R, or CM back covers, but the SDB pivot block is not offered on this adjustable variant. If your application requires CMSG, DMSG, or EMSG sensors, you must step up to the -S magnet version of this cylinder.
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 MIJ40X80-40 FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 40 mm on-site, while retract remains full. This SKU has no magnet, so it cannot take CMSG/DMSG/EMSG sensors; you need the -S variant for sensing.
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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