Airtac MICJ Adjustable Mini Cylinder MICJ40X40-20
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X40-20 is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke40 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 MICJ40X40-20
Dial in a precise forward stop on-site with the AirTAC MICJ40X40-20, a stainless-steel round-body mini cylinder built for double-acting operation. An external stop screw shortens the extend stroke by up to 20 mm (usable forward range 20-40 mm), while a needle-set adjustable air cushion at both ends absorbs high-speed shock.
The stainless barrel and rod resist mild corrosion and washdown environments. Note that this SKU lacks the -S magnet, so it cannot host CMSG, DMSG, or EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X40-20 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X40-20 |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MICJ40X40-20
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MICJ40X40-20 Is Used
Heavy Carton Diverter
Pushes loaded packaging cartons weighing up to 32 kg at high speed, using the 20 mm extend trim to hit the diverter gate precisely while the dual air cushion prevents end-of-stroke slamming.
Pallet Stop Gate
Halts heavy pallets on a washdown-friendly stainless line, absorbing the kinetic energy through the variable needle cushion instead of a hard mechanical crash.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X40-20 the Right Cylinder?
Choose the Ø40 when your application demands moving about 32 kg and requires the adjustable 20 mm extend stop paired with dual-end air cushions to control impact during fast set-position moves.
Keep in mind the stop screw sets only the end position; it is not a mid-stroke lock, and the air cushion solely decelerates near the stroke end without holding the load. If air pressure drops, the piston will drift, so add an external rod lock or pilot-operated check valve for suspended loads. Mount via LB foot, FA flange, or TC trunnion, plus CA, U, R, or CM back covers (SDB pivot-block is not offered 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 MICJ40X40-20 FAQ
This 40 mm bore cylinder features a 1/4" air port and an M12x1.25 male rod thread. 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, letting you dial in the forward position without swapping cylinders. Needle valves adjust the air cushion at both ends to decelerate the piston at high speed. This specific SKU lacks a magnet, so it cannot support CMSG, DMSG, or EMSG sensors; you need the -S variant for 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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