Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X300-20S is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke300 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 MICJ40X300-20S
Command high-energy motion with the AirTAC MICJ40X300-20S, a round-body stainless-steel mini cylinder built for double-acting operation. An external stop screw lets you dial in the forward position by up to 20 mm on-site, setting an exact extend endpoint between 280 and 300 mm without swapping hardware. Twin adjustable air cushions soak up high-speed impact at both ends, while the 1/4" port and 16 mm rod handle heavy dynamics. Because this is a -S SKU, a built-in piston magnet supports CMSG, DMSG, and EMSG sensors for precise position detection.
The stainless barrel and rod resist mild corrosion and washdown environments. Note that Ø40 is a non-ISO-6432 size, offering a larger round-body footprint for robust applications.
Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MICJ40X300-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MICJ40X300-20S Is Used
Pallet Diverter
Shift heavy pallets using the 32 kg vertical lift capacity, adjusting the forward reach on-site to match varying product widths without changing cylinders.
Carton Sealing Head
Lower a sealing head with exact 280-300 mm precision; the stainless construction handles washdown, while the -S magnet tracks the cycle for the PLC.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X300-20S the Right Cylinder?
The 20 mm extend adjuster paired with the needle-set air cushion is ideal for fast, repeatable set-position moves where you must control the impact at the end of travel.
Remember that the stop screw sets the end position but is not a mid-stroke lock; the piston will drift on air loss, and the cushion only decelerates near the stroke end. For holding a load vertically, add an external rod lock or pilot check valve. Mount via LB foot, FA flange, or TC trunnion (SDB is not offered on this variant), and leverage the -S magnet for electronic or reed switch integration.
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 MICJ40X300-20S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod.
An external screw shortens the extend stroke by up to 20 mm for on-site positioning, while the needle-set air cushions at both ends decelerate the piston at high speeds. The cushion is not a brake, and the cylinder will drift on air loss—use an external rod lock to hold a load. The -S magnet enables CMSG/DMSG/EMSG sensors.
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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