Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 300mm 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
- Stroke300 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 MFCJ25X300-20S
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ25X300-20S. This double-acting JIS-standard round-body mini cylinder features a 20 mm adjustable extend window, allowing you to shorten the 300 mm stroke on-site for precise trial fits. A needle-set variable air cushion at both ends ensures smooth deceleration.
Built with a SUS304 stainless barrel and riveted aluminium covers, the body is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion. The 1/8" port and Ø10 mm rod deliver 245.3 N push force at 0.5 MPa. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position switches. Factoring a 2:1 safety margin, it lifts about 12.5 kg vertically.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MFCJ25X300-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MFCJ25X300-20S Is Used
Sorting Diverter Tuning
Trim the 300 mm extend stroke by up to 20 mm on-site to perfect a conveyor sorting diverter position without machining new hard stops, while the air cushion handles rapid cycling.
Light Press Fit
Apply up to 245.3 N of push force at 0.5 MPa for delicate component seating, adjusting the exact insertion depth during changeovers to prevent over-travel.
Lowering Arrest
Manage the descent of a 12.5 kg vertical payload using the needle-adjustable air cushion to deliver a soft, shock-free landing at the end of the stroke.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X300-20S the Right Cylinder?
Choosing between bores means matching your payload to the actual thrust. The 25 mm bore here yields 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. If your changeover requires trimming the extend travel within the 20 mm window while running at high speeds, the adjustable needle cushion prevents harsh end-of-stroke impacts.
Remember that the air cushion only decelerates the piston; it does not function as a brake. If your application must hold a load vertically during an air loss event, install an external rod lock or pilot check valve. For mounting, use LB foot, FA flange, or TC trunnion brackets (SDB and rear covers are unavailable on this build). The built-in magnet supports CMSG, DMSG, and EMSG 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 MFCJ25X300-20S FAQ
This 25 mm bore cylinder uses a 1/8" port and a Ø10 mm rod. At 0.5 MPa it provides 245.3 N push and 206.1 N pull force. At 0.7 MPa it provides 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on-site, giving a usable range of 280-300 mm. The variable air cushion only decelerates the piston near the end of stroke; it is not a lock or brake. To hold a load on air loss, you need an external rod lock or pilot check valve. The -S magnet allows CMSG, DMSG, and EMSG sensors to be fitted.
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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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