Airtac MIJ Adjustable Cylinder MIJ8X40-20
The AirTAC Airtac MIJ Adjustable Cylinder MIJ8X40-20 is a genuine double acting, adjustable stroke round-body mini air cylinder with a Ø8mm bore and 40mm stroke, M5×0.8 air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ8 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM4×0.7
- 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 MIJ8X40-20
Trimming the forward end position by up to 20 mm via an external stop screw, this stainless-steel round-body mini cylinder lets you fine-tune the extend stroke on-site without swapping parts. It is a double-acting unit built on the ISO 6432 mounting interface, using an M5x0.8 air port and an M4x0.7 male rod thread. The retract stroke remains fixed at the full 40 mm.
At 0.5 MPa it delivers 25.1 N of push force and 18.8 N of pull force, yielding a safe working load of roughly 15 N or a vertical lift of about 1.3 kg with a 2:1 margin. The stainless barrel and rod resist mild corrosion and washdown environments. This SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors; fixed TPU bumper pads decelerate the stroke ends.
Airtac MIJ Adjustable Cylinder MIJ8X40-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ8X40-20 |
|---|---|
| Series | MIJ ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 40 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 150 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G.
Theoretical Output Force (Ø8mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 25 N | 19 N |
| 0.7 MPa | 35 N | 26 N |
| Max (@1.0 MPa) | 5 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MIJ Adjustable Cylinder MIJ8X40-20
| MIJ | ISO 6432 round-body mini cylinder (adjustable-stroke). |
|---|---|
| 8 | 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 (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MIJ Adjustable Cylinder MIJ8X40-20 Is Used
Micro-Clamp Actuation
Dial in the exact 20-40 mm extend position to clamp delicate electronic components without crushing them, relying on the 15 N safe working load for gentle, repeatable holding.
Light-Diverter Gate
Adjust the push-out distance on the fly to deflect small parcels of varying widths on a conveyor, using the 25.1 N thrust to nudge lightweight items reliably.
Staged Parts Feeding
Set the forward stop screw to push a small plastic part exactly 30 mm into a machining nest, allowing quick changeover for different part lengths without swapping cylinders.
Is the Airtac MIJ Adjustable Cylinder MIJ8X40-20 the Right Cylinder?
When sizing this 8 mm bore, moving up to the MIJ16X50-25 provides a substantial jump to 100.5 N of push force at 0.5 MPa if your payload exceeds the 15 N safe working load, while there is no smaller standard MIJ option below Ø8. The 20 mm adjustment window is ideal for taking up mechanical tolerances during setup or covering multiple stop positions with a single part number. Remember that the stop screw only sets the forward end position—it is not a mid-stroke lock, and the piston will drift on air loss, so add an external rod lock or pilot check valve for held loads. Mount via LB foot, FA flange, or TC trunnion (SDB pivot-block is not available), and select the -S magnet variant if you need position sensing.
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 MIJ8X40-20 FAQ
This 8 mm bore cylinder features an M5x0.8 air port and delivers 25.1 N push / 18.8 N pull at 0.5 MPa, and 35.2 N push / 26.4 N pull at 0.7 MPa. The theoretical maximum force is 5.1 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 20 mm on-site, giving a usable forward range of 20-40 mm while retract remains full. The screw is not a mid-stroke lock; the piston drifts on air loss, so use an external rod lock for holding. This non-S SKU also cannot take CMSG/DMSG/EMSG sensors.
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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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