Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- 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 MFCJ Adjustable Mini Cylinder MFCJ25X250-50
Tune both travel and end-of-stroke shock on-site with this AirTAC adjustable-stroke mini cylinder. The external adjuster shortens the extend stroke by up to 50 mm, giving a usable 200-250 mm extension, while the needle variable air cushion at both ends soaks up high-speed impact. It uses a 1/8" port and a 10 mm rod with an M10x1.25 male thread.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, the body is physically shorter than an ISO 6432 cylinder for the same 25 mm bore and 250 mm stroke, saving valuable mounting length. Generating 245.3 N push force at 0.5 MPa, it handles a safe working load of roughly 147 N. Note this SKU lacks a magnet, so it cannot take position sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50 |
|---|---|
| Series | MFCJ JIS 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 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 MFCJ25X250-50
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MFCJ25X250-50 Is Used
Actuator Trial Fitting
Dial in the exact 200-250 mm extend position on a new fixture while the variable air cushion protects the workpiece from high-speed impact during repetitive cycling.
Transfer Stroke Tuning
Shorten the extend stroke by up to 50 mm on-site to adapt a pusher arm for different carton lengths without machining new hard stops.
Light Load Positioning
Move items safely with a 147 N working load, using the needle cushion to quietly decelerate the 10 mm rod at the end of the 250 mm travel.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-50 the Right Cylinder?
Size by force: the 25 mm bore pushes 245.3 N at 0.5 MPa, sitting between the 157 N MFCJ20 and the 402.2 N MFCJ32. Choose this adjustable version when you need to dial in the exact extend position during high-speed changeovers or shock-sensitive trial fits, rather than relying on a fixed stroke. The variable air cushion decelerates the piston near the ends but does not lock the load; for vertical or held loads, install an external rod lock or pilot check valve to prevent drift on air loss. Mount via LB foot, FA flange or TC trunnion. Because this specific code has no -S suffix, it cannot accept CMSG, DMSG or EMSG magnetic switches.
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 MFCJ25X250-50 FAQ
This 25 mm bore cylinder uses a 1/8" port. At 0.5 MPa it pushes 245.3 N and pulls 206.1 N. At 0.7 MPa it pushes 343.4 N and pulls 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
No, this specific SKU lacks the -S magnet option, so it cannot accept CMSG, DMSG or EMSG switches. The external adjuster shortens the extend stroke by up to 50 mm, and the variable air cushion decelerates the piston, but neither feature acts as a mid-stroke lock or brake.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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