Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 125mm 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
- Stroke125 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 MFCJ25X125-50
Dial in exact end positions and soak up high-speed shock with the AirTAC MFCJ25X125-50 adjustable-stroke mini cylinder. This JIS-standard round-body actuator features a SUS304 stainless barrel with riveted aluminium covers, using an external adjuster to shorten the extend stroke by up to 50 mm on-site (usable extend 75-125 mm), while needle variable air cushions at both ends decelerate the piston smoothly. It delivers 245.3 N push force at 0.5 MPa via a 1/8" port.
For the same bore and stroke, this riveted body is shorter than an ISO 6432 cylinder, saving valuable mounting length in tight machinery. It yields a safe working load of about 147 N and lifts roughly 12.5 kg vertically with a 2:1 margin. Note this SKU lacks a magnet, so it cannot take CMSG/DMSG/EMSG switches; the -S variant is required for sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 125 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 MFCJ25X125-50
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×125 | 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 MFCJ25X125-50 Is Used
High-Speed Parts Ejection
Tune the 50 mm extend window to strike parts accurately, relying on the variable air cushion to absorb the 245.3 N impact during rapid 800 mm/s ejection cycles.
Adjustable Transfer Diverter
Fine-tune the diverter stroke on-site for mixed product sizes; the SUS304 barrel withstands washdown while the cushion prevents end-of-stroke slamming.
Variable Stroke Carton Stopper
Set the exact 75-125 mm extend position for different carton depths, using the needle cushion to halt the 147 N safe working load smoothly without bounce.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50 the Right Cylinder?
When sizing this series, compare the real 0.5 MPa push figures: the MFCJ20 yields 157 N, this MFCJ25 hits 245.3 N, and the MFCJ32 jumps to 402.2 N. Choose the 25 mm bore when your changeover demands roughly 147 N of safe working force plus on-site stroke tuning. The 50 mm adjuster window is perfect for trial fits where the exact extend endpoint varies, and the variable air cushion handles high-speed 30-800 mm/s cycling.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Remember that the air cushion only decelerates near stroke end—it is not a lock or brake. If the load must hold position on air loss, install an external rod lock or pilot check valve. Because this specific SKU has no -S magnet, it cannot accept position sensors.
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 MFCJ25X125-50 FAQ
This 25 mm bore cylinder has a 1/8" port and delivers 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa. It operates at speeds of 30-800 mm/s.
This specific SKU lacks a magnet, so it cannot accept CMSG/DMSG/EMSG switches; you need the -S variant for sensing. The external adjuster shortens the extend stroke by up to 50 mm (usable range 75-125 mm), but it only sets the end position—it is not a mid-stroke lock.
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Standard models are processed and dispatched in 3-5 business days.
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