Airtac MFJ Adjustable Mini Cylinder MFJ25X300-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X300-30 is a genuine double acting, adjustable stroke 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
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
- 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 MFJ Adjustable Mini Cylinder MFJ25X300-30
Tune your extend end position on the fly with the AirTAC MFJ25X300-30, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 30 mm directly on site, giving a usable extend range of 270 to 300 mm without buying a new unit or adding external stops. This riveted construction is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length while resisting mild corrosion and washdowns.
Delivering 245.3 N of push force at 0.5 MPa, this double-acting cylinder handles a safe working load of about 147 N, lifting roughly 12.5 kg vertically with a 2:1 margin. It features a 10 mm piston rod, an M10x1.25 male rod thread, and a 1/8" air port. Note that this specific SKU lacks a magnet and cannot take a sensor; you must select the -S variant to use CMSG, DMSG, or EMSG switches.
Airtac MFJ Adjustable Mini Cylinder MFJ25X300-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X300-30 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed TPU bumper pads |
| 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 MFJ Adjustable Mini Cylinder MFJ25X300-30
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 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 MFJ Adjustable Mini Cylinder MFJ25X300-30 Is Used
Changeover Stations
Dial in the exact extend stop during product format changes, using the 30 mm adjustment window to set positions between 270 and 300 mm without swapping hardware.
Trial Fit Rigs
Perfect for prototype testing where the final push point is unknown, letting technicians fine-tune the end position against a 245.3 N push force at 0.5 MPa.
Variable Position Stops
Acts as a compact, JIS-standard stainless stop cylinder that shortens on-site, saving mounting length compared to ISO 6432 units while handling a 12.5 kg vertical lift.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X300-30 the Right Cylinder?
When sizing these adjustable-stroke cylinders, compare the real thrust figures: the MFJ20 provides 157 N of push at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 offers 402.2 N. Choose the MFJ25X300-30 when you need mid-range force for trial fits or line changeovers where the exact 270 to 300 mm extend position is not final. The external adjuster sets the end point but does not lock the piston mid-stroke.
For mounting, you can use LB foot, FA flange, or TC trunnion brackets (there is no SDB option or back cover on this build). Remember that a plain cylinder drifts on air loss—the fixed TPU bumper pads only decelerate the stroke end, so install an external rod lock or pilot check valve if you need to hold a load safely.
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 MFJ Adjustable Mini Cylinder MFJ25X300-30 FAQ
This double-acting cylinder has a 25 mm bore, a 10 mm rod with an M10x1.25 male thread, and a 1/8" port. It pushes 245.3 N and pulls 206.1 N at 0.5 MPa; at 0.7 MPa it pushes 343.4 N and pulls 288.5 N. The theoretical max force is 50 kgf at 1.0 MPa. The external adjuster shortens the extend stroke by up to 30 mm (usable range 270-300 mm).
No. This SKU lacks a magnet, so it cannot take CMSG, DMSG, or EMSG switches—you need the -S variant for sensing. The adjuster only sets the extend end position; it is not a mid-stroke lock. The fixed TPU bumper pads decelerate the stroke end, but the piston will drift on air loss, so use an external rod lock to hold a load.
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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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