Airtac MIJ Adjustable Cylinder MIJ40X20-20
The AirTAC MIJ Adjustable Cylinder MIJ40X20-20 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 MIJ40X20-20
Trimming the forward end position by up to 20 mm on site, the AirTAC MIJ40X20-20 lets you fine-tune the extend stop without swapping hardware.
Built with a stainless-steel barrel and Ø16 rod for mild corrosion resistance, it operates at 30-800 mm/s on a 1/4" port with an M12x1.25 male thread. The retract stroke remains full while the external screw shortens only the extend end. It uses fixed TPU bumper pads for end deceleration, and because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ40X20-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X20-20 |
|---|---|
| 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 MIJ40X20-20
| 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 MIJ40X20-20 Is Used
Pallet Changeover
Quickly tune the forward position for different pallet widths without changing cylinders, relying on the 32 kg vertical lift capacity.
Is the Airtac MIJ Adjustable Cylinder MIJ40X20-20 the Right Cylinder?
When sizing this 40 mm bore, dropping down to an MIJ32 lowers the 0.5 MPa push force to 402.2 N, while stepping up is unavailable as this is the largest MIJ size. The 20 mm adjustment window is ideal for taking up mechanical tolerances or matching multiple part stops using one cylinder. Remember the stop screw sets the end position but is not a mid-stroke lock; the piston will drift on air loss, so fit 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 offered on this adjustable variant), and choose the -S magnet version 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 MIJ40X20-20 FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical max force is 128.1 kgf at 1.0 MPa. It uses a 1/4" port and a Ø16 rod with an M12x1.25 male thread.
An external stop screw shortens the extend stroke by up to 20 mm on site, while the retract stroke remains full. This SKU has no magnet (-S omitted), so it cannot take CMSG, DMSG or EMSG sensors. The stainless build resists mild corrosion, and fixed TPU bumpers decelerate the stroke end.
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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