Airtac MICJ Adjustable Mini Cylinder MICJ40X250-20S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X250-20S is a genuine double acting, double rod, adjustable stroke + cushion round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke250 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 MICJ40X250-20S
Shave up to 20 mm off the forward end position on site with the AirTAC MICJ40X250-20S, a round-body stainless-steel mini cylinder built for double-acting service. An external stop screw lets you dial in the extend stroke from 250 mm down to 230 mm without swapping hardware, while a needle-adjustable air cushion at both ends soaks up high-speed shock.
The stainless barrel and rod shrug off mild corrosion and washdown environments. Because this is a 40 mm bore, it is a non-ISO-6432 round-body design. The -S suffix means a piston magnet is installed, ready for CMSG, DMSG or EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X250-20S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X250-20S |
|---|---|
| Series | MICJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MICJ40X250-20S
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MICJ40X250-20S Is Used
Pallet Deceleration
Stop 30 kg pallets arriving at high speed on a belt; the dual adjustable air cushions absorb the impact without slamming.
Washdown Sorting
Divert large cartons in a damp packaging line, relying on the stainless steel construction to withstand mild washdown exposure.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X250-20S the Right Cylinder?
Choose this model when you need to set a precise forward stop and absorb kinetic energy at the end of a fast 30-800 mm/s move. Mount using LB foot, FA flange or TC trunnion brackets, as the SDB pivot block is not offered on this adjustable variant.
Remember that the stop screw sets the end position but does not function as a mid-stroke lock. The air cushion only decelerates the piston near the stroke end, and the cylinder will drift if air pressure is lost. To hold a load securely, install an external rod lock or pilot-operated check valve.
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 MICJ40X250-20S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. 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 magnet enables CMSG, DMSG or EMSG sensors. The cushion only decelerates and does not lock; the piston drifts on air loss, so use an external rod lock to hold a load.
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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