Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40
The AirTAC Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40 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 MICJ25X250-40
Trim the forward stop by up to 40 mm on site without swapping cylinders: the AirTAC MICJ25X250-40 is a double-acting, round-body stainless-steel mini cylinder with an adjustable extend stroke (usable forward range 210-250 mm) and an adjustable air cushion at both ends. The external screw sets the extend end position, while the cushion needles soak up high-speed shock. Retract remains a full 250 mm stroke. Built with a stainless barrel and Ø10 mm piston rod, it resists mild corrosion and washdown environments. It uses the ISO 6432 mounting interface for standard mini brackets and features a 1/8" port.
Delivering 245.3 N of push force at 0.5 MPa, this bore size handles solid mid-range workloads. A practical safe working load is about 147 N, which means it can vertically lift roughly 12.5 kg with a 2:1 safety margin. Note that this specific SKU lacks a magnet (-S), so it cannot host CMSG, DMSG, or EMSG sensors. The cushion only decelerates the piston near the stroke end; it is not a mid-stroke lock or brake.
Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40 Technical Specifications
| Model | Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40 |
|---|---|
| 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 MICJ25X250-40
| 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 MICJ25X250-40 Is Used
Long-Reach Diverting
Pushes packages at the end of a 250 mm stroke, using the 40 mm extend adjustment to fine-tune the contact point without moving the bracket.
High-Speed Carton Sealing
Cycles rapidly to fold flaps; the dual adjustable air cushions absorb the impact at both ends to prevent crushing the 12.5 kg load.
Adjustable Stop Positioning
Drives a machining fixture forward, dialing the extend stop in 1 mm increments to accommodate different part widths on the line.
Is the Airtac MICJ Adjustable Mini Cylinder MICJ25X250-40 the Right Cylinder?
When sizing this 25 mm bore, stepping down to a 20 mm MICJ drops the 0.5 MPa push force to 157 N, while stepping up to a 32 mm bore increases it to 402 N. Choose this model when you need a long 250 mm reach combined with a 40 mm on-site extend adjustment to dial in a precise forward stop for high-speed actuation. The dual adjustable air cushions are essential for absorbing kinetic energy at the end of this long travel. Mount using LB foot, FA flange, or TC trunnion brackets; the SDB pivot-block is not available on this adjustable-stroke variant.
Because a standard pneumatic cylinder does not hold position on air loss, the piston will drift if pressure drops or the valve is centered. The external stop screw and air cushion decelerate the load but do not function as a mid-stroke lock or brake. If your application requires the load to be physically held in place, add an external rod lock or a pilot-operated check valve to the system.
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 MICJ25X250-40 FAQ
This 25 mm bore cylinder has a 1/8" air port. At 0.5 MPa it provides 245.3 N push and 206.1 N pull force. At 0.7 MPa it provides 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
An external stop screw shortens the extend stroke by up to 40 mm (usable forward range 210-250 mm), while the retract stroke remains fixed at 250 mm. Adjustable air cushions at both ends use needle valves to decelerate the piston at high speed. This SKU has no -S magnet and cannot take sensors; it is not a mid-stroke lock.
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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