Airtac MICJ Adjustable Mini Cylinder MICJ40X80-20S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X80-20S is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke80 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 MICJ40X80-20S
The external stop screw trims the extend end by up to 20 mm on-site, so you can dial in the forward position from 60 to 80 mm without changing the cylinder. Its adjustable air cushion at both ends absorbs high-speed impact, protecting the load and the machine.
The stainless barrel and rod resist mild corrosion and washdown, making it suitable for damp or clean-washed areas. The built-in magnet enables CMSG, DMSG, or EMSG sensors for position detection. The 1/4" port delivers ample flow for the 80 mm stroke at speeds up to 800 mm/s.
Airtac MICJ Adjustable Mini Cylinder MICJ40X80-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X80-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MICJ40X80-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MICJ40X80-20S Is Used
Fixture Positioning
Set the extend stop to 70 mm for precise clamping of a 30 kg fixture in a CNC workholding station. The cushion prevents shock to the part.
Carton Indexing
Index cartons weighing up to 32 kg onto a conveyor. The adjustable stop trims the push-over point, while the cushion handles the line speed.
Press Ram Stop
Use as a ram stop in a small press, adjusting the extend length to 65 mm for different part heights.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X80-20S the Right Cylinder?
This MICJ40X80-20S suits applications needing a strong, adjustable forward stop with cushioned deceleration. The stop screw sets the end position only-it is not a mid-stroke lock, and the cylinder will drift if air pressure is lost. Use an external rod lock for holding loads. The -S magnet allows sensor mounting; the SDB pivot block is not available on this adjustable-stroke variant.
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 MICJ40X80-20S FAQ
At 0.5 MPa, push force is 628.3 N and pull is 527.8 N. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. Theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external screw shortens the extend end by up to 20 mm, setting your forward stop. The adjustable air cushion at both ends decelerates the piston near stroke end, reducing shock. The screw is not a mid-stroke lock, and the cylinder will drift on air loss.
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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