Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 80mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ25 mm
- Stroke80 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 MFCJ Adjustable Mini Cylinder MFCJ25X80-40S
Dial in exact end positions and soak up high-speed shock with this double-acting, adjustable-stroke mini cylinder. The external adjuster shortens the extend stroke by up to 40 mm on site, while the needle-set variable air cushion at both ends ensures smooth deceleration. It features a JIS-standard round-body build with a SUS304 stainless barrel and riveted aluminium covers, giving you a shorter mounting length than an ISO 6432 unit for the same 80 mm stroke.
Driven by a 1/8" port and a Ø10 mm rod with an M10x1.25 male thread, this bore delivers 245.3 N of push force at 0.5 MPa. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG sensors. For sizing, it yields a safe working load of about 147 N, meaning it lifts roughly 12.5 kg vertically with a 2:1 safety margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 80 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 MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
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 MFCJ Adjustable Mini Cylinder MFCJ25X80-40S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S Is Used
Actuator Trial Fitting
Use the 40 mm adjuster window to fine-tune the extend reach on the fly during machine commissioning, avoiding the need to machine new spacers for your 12.5 kg vertical lift fixtures.
High-Speed Diverter
Leverage the variable air cushion to silently stop the 245.3 N push stroke at high cycle rates, preventing impact damage when sorting heavier goods.
Adjustable Sealing Press
Set the precise extend position for varied carton sizes and let the needle cushion absorb the end shock, ensuring consistent sealing pressure without jarring the frame.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S the Right Cylinder?
Choose between the available bores based on your force needs: the MFCJ20 provides 157 N of push force at 0.5 MPa for lighter duties, while the MFCJ32 steps up to 402.2 N for heavier loads. This 25 mm bore sits perfectly in the middle at 245.3 N, offering a balanced footprint. The adjustable stroke and twin air cushions shine in high-speed changeovers where trial fits are needed and end-of-stroke shock must be tuned out.
Mount this unit via LB foot, FA flange or TC trunnion (there is no SDB or back-cover option here). Remember that the cushion only decelerates the piston near stroke end—it does not lock or hold the load. If air pressure drops, the piston will drift; for suspended loads, install an external rod lock or pilot check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/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/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X80-40S FAQ
This cylinder uses a 1/8" port. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm. The variable air cushion only decelerates the piston near the end; it does not lock or hold the load. The -S suffix provides a magnet for CMSG, DMSG or EMSG sensors.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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