Airtac MICJ Adjustable Mini Cylinder MICJ40X30-20S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X30-20S is a genuine double acting, double rod, adjustable stroke + cushion 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 + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- 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 MICJ Adjustable Mini Cylinder MICJ40X30-20S
Dial in a precise forward stop on-site with the AirTAC MICJ40X30-20S, a round-body stainless-steel mini cylinder that shortens the extend stroke by up to 20 mm via an external screw. It pairs this settable end position with a needle-adjustable air cushion at both ends, soaking up high-speed shock to deliver smooth 10 to 30 mm extend moves. Driven by a 1/4" port and a 16 mm rod, this double-acting actuator pushes with 628.3 N at 0.5 MPa.
The stainless barrel and rod resist mild corrosion and washdown environments. Because this is a -S SKU, it includes a built-in piston magnet for CMSG, DMSG or EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X30-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X30-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Acting type | Double acting, double rod, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MICJ Adjustable Mini Cylinder MICJ40X30-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 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 MICJ Adjustable Mini Cylinder MICJ40X30-20S Is Used
Diverter Gate Control
Position a heavy sorting gate precisely. The 20 mm extend adjustment lets you set the exact deflection angle, while the dual air cushions absorb the impact of fast 628.3 N strokes.
Carton Flap Folding
Drive a folding arm at high speed to tuck heavy cardboard flaps. The adjustable forward stop fine-tunes the fold depth on-site without changing the entire actuator.
Vertical Press Tamping
The needle cushions decelerate the 16 mm rod smoothly at the stroke end to prevent harsh slamming.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X30-20S the Right Cylinder?
The adjustable stop screw and dual air cushions are ideal for fast, repeatable set-position moves, but remember the screw only trims the extend end and acts purely as an end stop, never a mid-stroke lock.
Because a standard cylinder drifts on air loss, add an external rod lock or pilot check valve if you need to hold a suspended load. For mounting, choose LB foot, FA flange or TC trunnion brackets (the SDB pivot block is not offered on this adjustable variant). The included -S magnet enables CMSG, DMSG and EMSG 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 MICJ Adjustable Mini Cylinder MICJ40X30-20S FAQ
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.
An external screw shortens the extend stroke by up to 20 mm, letting you set a 10 to 30 mm forward position without swapping cylinders. Needle valves adjust the air cushion at both ends to decelerate the piston before impact. The -S magnet allows CMSG, DMSG and EMSG switches for position 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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