Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S is a genuine double acting, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S
Dial in the forward stop on-site without swapping cylinders: the MICJ40X50-20S uses an external screw to shorten the extend end position by up to 20 mm, giving a usable forward range of 30-50 mm. Retract remains full stroke. A needle-set variable air cushion at both ends soaks up high-speed shock to protect your tooling.
This round-body stainless mini cylinder features a 1/4" port, a 16 mm piston rod with an M12x1.25 male thread, and a built-in magnet for CMSG/DMSG/EMSG sensors. Delivering 628.3 N of push force at 0.5 MPa, it yields a safe working load of about 377 N and can vertically lift roughly 32 kg with a 2:1 margin. The stainless barrel and rod resist mild corrosion and washdown environments.
Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting, 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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S Is Used
Heavy Press Dampening
Drives a 30 kg stamping head at high speed, using the 20 mm extend adjustment to set the exact crush depth while the dual air cushions absorb the end-of-stroke impact.
Pallet Deflector Gate
Pushes loaded pallets weighing up to 32 kg, relying on the adjustable forward stop to tune the deflection angle precisely without moving the mounting hardware.
Carton Sealing Head
Applies 377 N of safe clamping force to close heavy cartons, using the needle cushion to prevent bounce when cycling at 800 mm/s.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X50-20S the Right Cylinder?
For lighter 0.5 MPa moves needing about 402 N push, the Ø32 bore is your step down; the Ø40 is the largest in this series, so for heavier loads you must switch families. Choose this Ø40 model when you need high force combined with fast, settable end-positioning. The external stop screw sets the extend endpoint, while the air cushion only decelerates near the stroke end—it is not a mid-stroke lock. If the machine loses air, the piston drifts, so add an external rod lock or pilot check valve for held loads.
Mount using LB foot, FA flange, or TC trunnion brackets (SDB pivot-block is not available on this adjustable variant). Because this SKU includes the -S magnet, you can directly mount CMSG, DMSG, or EMSG reed or electronic switches for 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 MICJ40X50-20S FAQ
It features a 1/4" port and delivers 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 20 mm on-site, while needle valves adjust the air cushion at both ends to decelerate high-speed moves. The -S suffix means it has a built-in magnet for CMSG/DMSG/EMSG sensors. It does not hold position on air loss; use an external rod lock for that.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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