Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-30 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 MFCJ25X125-30
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X125-30, a JIS-standard round-body mini cylinder. This double-acting actuator features a 30 mm external adjuster that shortens the 125 mm extend stroke down to 95 mm on-site, while a needle variable air cushion at both ends soaks up end-of-stroke impact. Its SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdown, and the compact riveted body is shorter than an ISO 6432 cylinder for the same bore and stroke.
Operating at 30-800 mm/s on a 1/8" port with an Ø10 mm rod (M10x1.25 male thread), it delivers 245.3 N push and 206.1 N pull at 0.5 MPa. This yields a safe working load of about 147 N, lifting roughly 12.5 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-30 |
|---|---|
| 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 MFCJ25X125-30
| 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 MFCJ25X125-30 Is Used
High-Speed Part Ejection
Tune the extend stroke by up to 30 mm during tooling changeovers while the variable air cushion safely decelerates the 245.3 N push force at high cycle rates.
Adjustable Transfer Stops
Set precise 95 to 125 mm stop positions on the fly for mixed product lines, using the needle cushion to prevent shock damage when halting lightweight carriers.
Variable Stroke Pushers
Push varied carton sizes without swapping cylinders; the external adjuster fine-tunes the extend endpoint and the cushion absorbs the impact of rapid retraction.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-30 the Right Cylinder?
Choose between the 20, 25, 32, and 40 mm bores based on your force needs. The MFCJ25 hits 245.3 N push at 0.5 MPa—fitting neatly between the 157 N MFCJ20 and the 402.2 N MFCJ32. If your changeover requires both exact end-position tuning and high-speed deceleration, this 30 mm adjustable window with variable air cushion is ideal. Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover here).
Remember the cushion only decelerates near stroke end; it is not a lock. If air pressure drops, the piston drifts, so add an external rod lock or pilot check valve to hold a suspended load. Because this specific unit has no -S magnet, position sensing is unavailable unless you switch to the -S variant.
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 MFCJ25X125-30 FAQ
This 25 mm bore cylinder uses a 1/8" port and an Ø10 mm rod. It delivers 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical max of 50 kgf at 1.0 MPa. The 125 mm base stroke is adjustable down to 95 mm via the 30 mm external window.
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must order the -S variant for position sensing. The external adjuster only sets the extend end position; it does not lock the piston mid-stroke.
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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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