Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-100S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-100S 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 MFCJ25X250-100S
Tune both the extend reach and the end-of-stroke shock on-site with this 25 mm bore, 250 mm base stroke cylinder. The external adjuster lets you shorten the extend stroke by up to 100 mm (usable range 150-250 mm), while the needle-set variable air cushion at both ends soaks up high-speed impact for smooth, quiet operation.
Built as a JIS-standard round-body mini with a SUS304 stainless barrel and riveted aluminium covers, it packs a 245.3 N push force at 0.5 MPa (206.1 N pull) through a 1/8" port. The -S suffix means a piston magnet is built in for CMSG/DMSG/EMSG switches. The compact riveted body is shorter than an ISO 6432 cylinder for the same stroke, saving mounting length. With a safe working load around 147 N, it lifts about 12.5 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-100S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-100S |
|---|---|
| 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 MFCJ25X250-100S
| 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 MFCJ25X250-100S Is Used
High-Speed Component Pressing
Dial in the exact 150-250 mm extend reach and tune the needle air cushion to decelerate the 245.3 N push force smoothly during rapid pressing cycles.
Adjustable Transfer Diverter
Fine-tune the diverting stroke length on-site for changing package sizes, relying on the SUS304 stainless body to handle mild washdown environments.
Vertical Lift Positioning
Lift loads up to 12.5 kg with a 2:1 safety margin, adjusting the extend end by up to 100 mm to hit varying shelf heights without swapping cylinders.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-100S the Right Cylinder?
Size this 25 mm bore against the adjacent options: the MFCJ20 delivers 157 N @0.5 MPa for lighter duties, while the MFCJ32 jumps to 402.2 N @0.5 MPa for heavier loads. Choose the MFCJ25 when you need 245.3 N of push force combined with on-site stroke and cushion tuning for high-speed changeovers or shock-sensitive trial fits.
Mounting uses LB foot, FA flange, or TC trunnion (no SDB or back-cover). The -S magnet supports CMSG/DMSG/EMSG sensors. Remember that the air cushion only decelerates near the stroke end—it is not a lock. If the load must hold position on air loss, fit 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 MFCJ25X250-100S FAQ
This 25 mm bore 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 100 mm (usable 150-250 mm), and the variable air cushion decelerates the piston at both ends. It is double-acting and includes a magnet (-S) for CMSG/DMSG/EMSG sensors. The cushion only decelerates; it does not lock or hold the load on air loss—use an external rod lock for that.
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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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