Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X250-30 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 MICJ40X250-30
Dial in a precise forward stop on-site with the AirTAC MICJ40X250-30, a round-body stainless-steel mini cylinder featuring an external screw that shortens the extend stroke by up to 30 mm (usable extend 220-250 mm). Built as a double-acting actuator, it pairs this settable end-position with a variable air cushion at both ends to soak up high-speed shock.
The stainless barrel and piston rod resist mild corrosion and washdown environments. Because this is a non-magnet SKU, it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30 |
|---|---|
| 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 MICJ40X250-30
| MICJ | round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -30 | 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 MICJ40X250-30 Is Used
Heavy Carton Diverting
Pushes heavy cartons at high speed on a packaging line, using the 30 mm extend stop to fine-tune the push distance and the air cushion to prevent end-of-stroke slamming.
Vertical Press Down
Provides a steady 628.3 N pressing force to seat components, relying on the adjustable forward position to accommodate varying part thicknesses without retooling.
Pallet Stopper Gate
Acts as a robust stop gate for heavy pallets, absorbing the kinetic energy of impacts through the adjustable air cushion while maintaining a precise barrier height.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30 the Right Cylinder?
The adjustable extend stop plus needle-set cushion shines in fast set-position moves where you must tune the forward impact without swapping cylinders. Note that the stop screw sets the end position but is not a mid-stroke lock; the piston will drift on air loss, so add an external rod lock or pilot check valve for held loads. Mount via LB foot, FA flange, or TC trunnion, but exclude the SDB pivot-block as it is unavailable 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 MICJ40X250-30 FAQ
This 40 mm bore cylinder uses a 1/4" air port. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 30 mm, letting you set the forward end position on-site. The needle-set air cushion at both ends decelerates the piston near stroke ends to absorb high-speed shock. The cushion only decelerates and does not act as a brake; the cylinder cannot hold a load on air loss and will drift, so use an external rod lock for holding. This non-S SKU lacks a magnet and cannot take sensors.
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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