Airtac MIJ Adjustable Cylinder MIJ40X30-20
The AirTAC MIJ Adjustable Cylinder MIJ40X30-20 is a genuine double acting, double rod, adjustable stroke round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke30 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 MIJ40X30-20
Trimming the forward end by up to 20 mm on-site, this double-acting round-body mini cylinder lets you dial in the exact extend position from 10 to 30 mm without swapping parts. The external stop screw shortens the extend stroke only, while retract remains full. Built with a stainless-steel barrel and piston rod, it handles mild corrosion and washdown environments. It features a 1/4" port, a Ø16 mm rod, and an M12x1.25 male rod thread.
Fixed TPU bumper pads decelerate the stroke end, operating at speeds of 30-800 mm/s.
Airtac MIJ Adjustable Cylinder MIJ40X30-20 Technical Specifications
| Model | Airtac MIJ Adjustable Cylinder MIJ40X30-20 |
|---|---|
| Series | MIJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MIJ40X30-20
| MIJ | round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MIJ40X30-20 Is Used
Variable Stroke Diverting
Adjust the forward stop on-site to handle different package widths on a washdown line, relying on the stainless construction and fixed TPU bumpers to absorb the impact at the end of travel.
Staged Product Ejection
Set the exact extend position to push heavy items off a staging area, using the 1/4" port and double-acting power to move loads safely within the 377 N working load limit.
Is the Airtac MIJ Adjustable Cylinder MIJ40X30-20 the Right Cylinder?
The 20 mm adjustment window is ideal for taking up mechanical tolerances during setup or covering several stop positions with one part number. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors. You can mount it using LB foot, FA flange, or TC trunnion brackets, plus CA, U, R, or CM back covers, but SDB pivot blocks are not available for this adjustable type.
The stop screw sets the forward end position but is not a mid-stroke lock. A plain cylinder drifts on air loss, and the bumpers only soften the stroke end. To hold a suspended load securely, add an external rod lock or a pilot-operated check valve.
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 MIJ40X30-20 FAQ
The theoretical maximum force is 128.1 kgf at 1.0 MPa. This 40 mm bore cylinder uses a 1/4" air port and a Ø16 mm 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 10 and 30 mm; the retract stroke remains full. This specific SKU does not have a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors. The stop screw is an end-position adjuster, not a mid-stroke lock.
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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