Airtac MICJ Adjustable Mini Cylinder MICJ40X20-20
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X20-20 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 20mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke20 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 MICJ40X20-20
Dial in the forward stop on site without swapping cylinders: the MICJ40X20-20 uses an external screw to shorten the extend end position by up to 20 mm, while a needle-set adjustable air cushion at both ends soaks up high-speed shock. This double-acting round-body mini cylinder features a stainless-steel barrel and rod for mild corrosion and washdown resistance. It operates at 30-800 mm/s with a 1/4" port and an M12x1.25 male rod thread.
Note that this SKU lacks the -S magnet, so it cannot take CMSG, DMSG or EMSG sensors; the -S variant is required for position sensing.
Airtac MICJ Adjustable Mini Cylinder MICJ40X20-20 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X20-20 |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MICJ40X20-20
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MICJ40X20-20 Is Used
Heavy Clamping Stop
Secure heavy workpieces in machining fixtures, using the 20 mm extend adjustment to dial in the exact clamping contact point without shimming.
High-Speed Diverter
Pivot heavy product diverters on a packaging line at speed, relying on the adjustable air cushion to absorb shock at the end of every stroke.
Pallet Stop Gate
Halt pallets up to 32 kg on a gravity roller conveyor, fine-tuning the physical stop position by up to 20 mm to match pallet geometry.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X20-20 the Right Cylinder?
The external stop screw and dual adjustable air cushions are ideal for fast, repeatable set-position moves where you need to tune both the impact and the exact forward end point within that 0-20 mm window.
Remember that the stop screw sets the end position but is not a mid-stroke lock, and the air cushion only decelerates near the stroke end. If the application must hold a load on air loss or when a valve is centered, the piston will drift; add an external rod lock or pilot-operated check valve. For mounting, choose LB foot, FA flange or TC trunnion, plus CA, U, R or CM back covers; the SDB pivot-block is not available on this adjustable 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 MICJ40X20-20 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 on site, while the needle-set adjustable air cushion at both ends decelerates the piston near the ends to absorb high-speed shock. This specific SKU does not have a magnet, so it cannot accept CMSG, DMSG or EMSG sensors; you must use a -S variant 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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