Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50S 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 MFCJ25X125-50S
Dial in exact extend lengths on the factory floor with the AirTAC MFCJ25X125-50S, a JIS-standard round-body mini cylinder featuring a 50 mm adjustable stroke window (usable extend 75-125 mm) and needle-set variable air cushions at both ends. The riveted SUS304 stainless barrel and aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of the same bore and stroke, resisting mild washdown corrosion while soaking up high-speed end-of-stroke shock.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa on a 1/8" port, this double-acting actuator provides a safe working load of roughly 147 N. Because the -S suffix includes a piston magnet, you can mount CMSG, DMSG or EMSG sensors for position confirmation. The external adjuster solely shortens the extend end and the cushions only decelerate, so add an external rod lock if you need to hold a load on air loss.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50S |
|---|---|
| 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 MFCJ25X125-50S
| 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 MFCJ25X125-50S Is Used
High-Speed Component Pressing
Tune the 75-125 mm extend on the fly to seat delicate electronic connectors, using the variable air cushion to absorb the 245.3 N impact at high cycling speeds.
Adjustable Transfer Diverter
Dial in the exact push-off distance for varying box sizes on a packaging line, relying on the 147 N safe working load to re-route lightweight goods smoothly.
Vertical Lift Stops
Lift approximately 12.5 kg tote bins using the 2:1 safety margin, adjusting the extend stroke to match shelf heights while the needle cushion prevents harsh end strikes.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-50S the Right Cylinder?
When sizing this series, compare the real thrust: the 25 mm bore gives 245.3 N push at 0.5 MPa, sitting neatly between the 157 N of an MFCJ20 and the 402.2 N of an MFCJ32. Choose the 25 mm bore when your changeover requires lifting about 12.5 kg vertically with a 2:1 margin, and step up to the 32 mm bore only if that payload exceeds the smaller capacity. Both options share the 30-800 mm/s speed range and variable air cushions, making them ideal for high-speed trial fits where end-of-stroke shock must be tuned out.
Mounting options include LB foot, FA flange and TC trunnion (with no SDB or back-cover available on this adjustable build). The -S magnet enables CMSG/DMSG/EMSG switches for closed-loop tracking. Remember that the air cushion decelerates the piston near the stroke end but does not function as a brake; for vertical or suspended loads that must hold position during a pressure drop, install a pilot-operated check valve or external rod lock.
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 MFCJ25X125-50S FAQ
This 25 mm bore cylinder features a 1/8" air port and generates 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, with an operating pressure range of 0.15-1.0 MPa.
The external adjuster shortens the extend stroke by up to 50 mm (yielding a 75-125 mm usable range), while the variable air cushion at both ends decelerates the piston to reduce high-speed shock. The -S suffix denotes a built-in piston magnet for use with CMSG, DMSG or EMSG sensors; the cushion only decelerates and does not lock the load.
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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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