Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30S
The AirTAC MICJ Adjustable Mini Cylinder MICJ40X250-30S 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 MICJ40X250-30S
Dial in the forward stop on-site without swapping cylinders: the MICJ40X250-30S uses an external screw to shorten the extend end by up to 30 mm, giving a usable forward range of 220-250 mm while retract stays full. A needle-set variable air cushion at both ends soaks up high-speed shock, letting you set the position and control the impact.
The stainless barrel and rod resist mild corrosion and washdown. The built-in magnet (-S) supports CMSG, DMSG and EMSG sensors.
Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30S |
|---|---|
| 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 MICJ40X250-30S
| 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 MICJ40X250-30S Is Used
Vertical Lift Stop
Lowers a 32 kg fixture smoothly, relying on the adjustable lower cushion to prevent end-stroke slamming while the external screw sets the exact drop depth.
Pallet Positioning Pusher
Advances pallets into a wrapping station, trimming the forward stop by up to 30 mm to match pallet width variations without re-mounting the cylinder.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ40X250-30S the Right Cylinder?
The 30 mm extend adjuster and dual air cushions excel in fast set-position moves where you must tune the forward stop and decelerate the load smoothly. It operates at 30-800 mm/s.
The stop screw sets the end position but is not a mid-stroke lock; the air cushion only decelerates near stroke end, and the piston drifts on air loss. For a held load, use an external rod lock or pilot check valve. Mount via LB foot, FA flange or TC trunnion (SDB pivot-block is not available), and pair the -S magnet with CMSG/DMSG/EMSG switches.
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 MICJ40X250-30S FAQ
This 40 mm bore cylinder has a 1/4" port and M12x1.25 male rod thread.
An external screw shortens the extend stroke by up to 30 mm (retract remains full). A needle-set variable air cushion at both ends decelerates the load near stroke end but does not lock the piston. The -S magnet allows CMSG, DMSG and EMSG sensors to be fitted.
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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