Airtac MIJ Adjustable Cylinder MIJ40X350-20
The AirTAC MIJ Adjustable Cylinder MIJ40X350-20 is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 350mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke350 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 MIJ40X350-20
Dial in a precise forward end position on the factory floor with the AirTAC MIJ40X350-20, a round-body stainless steel mini cylinder built for double-acting operation. An external stop screw lets you shorten the extend stroke by up to 20 mm on site, yielding a usable forward range of 330 to 350 mm without changing the part number. This on-site adjustability absorbs mechanical tolerances and simplifies changeovers, while the retract stroke remains full length.
The 40 mm bore delivers substantial force, pushing with 628.3 N and pulling with 527.8 N at 0.5 MPa. The stainless barrel and rod resist mild corrosion and washdown environments. Note this Ø40 size falls outside the ISO 6432 mounting standard, and because this specific SKU lacks the -S magnet, it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MIJ Adjustable Cylinder MIJ40X350-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X350-20 |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 MIJ40X350-20
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MIJ40X350-20 Is Used
Heavy Diverter Gate
Position heavy package routing gates on a conveyor line, using the 20 mm extend adjustment to fine-tune the deflection angle for varying carton sizes without swapping hardware.
Pallet Stopper Arm
Arrest pallets at a packing station using the full 350 mm extend, adjusting the stop nut to accommodate different pallet overhang tolerances on the fly.
Is the Airtac MIJ Adjustable Cylinder MIJ40X350-20 the Right Cylinder?
When sizing this actuator, compare the thrust against adjacent options. Stepping down to the Ø32 MIJ bore drops the 0.5 MPa push force to 402.2 N, whereas this Ø40 model provides 628.3 N—useful when your payload demands more authority. Since there is no larger standard MIJ bore, verify that 128.1 kgf theoretical maximum at 1.0 MPa covers your peak requirement. The 20 mm external stop screw is ideal for taking up assembly tolerances during initial setup.
Remember that the stop screw sets the end position but acts purely as a mechanical stop, not a mid-stroke lock. If air pressure drops, the piston will drift, as the fixed TPU bumper pads only decelerate the stroke end rather than holding the load. For suspended loads, install an external rod lock or pilot check valve. Mount this cylinder using LB foot, FA flange, or TC trunnion brackets, plus CA, U, R, or CM back covers. The SDB pivot block is not available on this adjustable variant, and the 1/4" port feeds the 16 mm rod.
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 MIJ40X350-20 FAQ
At 0.5 MPa this 40 mm bore cylinder pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It features a 1/4" air port and a 16 mm piston rod with an M12x1.25 male thread.
An external stop screw shortens the extend stroke by up to 20 mm, allowing you to set the forward end position between 330 and 350 mm on site. The retract stroke remains full length. This screw is just a mechanical stop, not a mid-stroke lock; the piston will drift on air loss, and the fixed TPU bumpers only soften the stroke end. Also, this non-S SKU lacks a magnet and cannot host sensors.
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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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