Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S is a genuine double acting, adjustable stroke + cushion round-body mini air cylinder with a Ø25mm bore and 250mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ25 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MICJ25X250-40S
Trim the forward stop by up to 40 mm on site without swapping hardware: the MICJ25X250-40S is a double-acting, round-body stainless-steel mini cylinder with an adjustable extend stroke and needle-set air cushions at both ends. The external screw shortens the extend end position from its 250 mm nominal maximum down to 210 mm, while the retract stroke remains full. An adjustable air cushion soaks up high-speed shock at the stroke ends, letting you dial in the exact forward position and control the impact.
Built with a stainless barrel and piston rod for mild corrosion and washdown resistance, this Ø25 bore unit pushes with 245.3 N and pulls with 206.1 N at 0.5 MPa. The built-in magnet (-S) supports CMSG, DMSG, and EMSG position switches. It uses the ISO 6432 mini-cylinder mounting interface and a 1/8" port. For a safe working load, expect around 147 N, which translates to a vertical lift of about 12.5 kg with a 2:1 safety margin.
Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S |
|---|---|
| Series | MICJ ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S
| MICJ | ISO 6432 round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -40 | 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 (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S Is Used
Adjustable Stop Sorting
Dial in the 210 to 250 mm extend position to push varying box sizes onto a conveyor, using the 245.3 N push force and needle cushions to absorb the high-speed impact.
Vertical Lift Diverter
Safely lift and divert 12.5 kg loads using the 2:1 safety margin, relying on the stainless construction for washdown resistance in packaging lines.
Tuned Clamping Press
Set the exact 40 mm forward adjustment for delicate clamping tasks, letting the adjustable air cushion soak up end-of-stroke shock without damaging the part.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40S the Right Cylinder?
When sizing this unit, compare the forces both ways: stepping down to a Ø20 bore drops the 0.5 MPa push force to 157 N, while stepping up to a Ø32 bore increases it to 402 N. Choose this Ø25 model when you need roughly 147 N of safe working force combined with a highly specific extend endpoint. The 40 mm external stop adjustment is ideal for fast set-position moves where you need to tune the forward travel on the fly, and the dual adjustable cushions handle the resulting high-speed impacts.
For mounting, you can use LB foot brackets, FA flanges, or TC trunnions alongside back covers like CA, U, R, or CM, but note the SDB pivot-block is not available on this adjustable variant. Remember that the stop screw and air cushion only decelerate the piston near the stroke end; they do not function as a mid-stroke lock. If your application must hold a load vertically on air loss, add 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 MICJ25X250-40S FAQ
This Ø25 mm cylinder features a 1/8" port and an M10x1.25 male rod thread. At 0.5 MPa it pushes with 245.3 N and pulls with 206.1 N. At 0.7 MPa the push is 343.4 N and pull is 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
An external screw shortens the extend stroke by up to 40 mm on site, while needle valves adjust the air cushion at both ends to decelerate the piston at high speed. The -S suffix means a piston magnet is built in, allowing you to mount CMSG, DMSG, or EMSG sensors for position detection.
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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