Airtac MFJ Adjustable Mini Cylinder MFJ25X75-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X75-40 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 75mm 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
- Stroke75 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 MFJ25X75-40
Trim the extend stroke by up to 40 mm on site with the AirTAC MFJ25X75-40, a JIS-standard round-body mini cylinder built for double-acting service. The external adjuster lets you set the extend end anywhere in a 35 to 75 mm usable window without buying a new unit or adding external stops, which is ideal for trial fits and line changeovers where the exact end position is not final. A SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdown, while the riveted rolling-packed construction keeps the overall body shorter than an ISO 6432 cylinder of the same bore and stroke to save mounting length.
In the 25 mm bore class this cylinder delivers 245.3 N of push force and 206.1 N of pull force at 0.5 MPa, peaking at a theoretical 50 kgf at 1.0 MPa. That translates to a safe working load of about 147 N, or enough to lift roughly 12.5 kg vertically with a 2:1 safety margin. It uses a 1/8" port, a 10 mm piston rod with an M10x1.25 male thread, fixed TPU bumper pads for end deceleration, and operates at 30-800 mm/s. Note that this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG position switches.
Airtac MFJ Adjustable Mini Cylinder MFJ25X75-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X75-40 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 75 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 MFJ25X75-40
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×75 | 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 MFJ25X75-40 Is Used
Changeover Dial-In
Fine-tune the extend end by up to 40 mm during product changeovers to set new push positions without swapping out the entire cylinder.
Prototype Trial Fits
Use the 245.3 N push force to test actuation distances on prototype rigs, adjusting the 75 mm extend stroke on the fly until the kinematics are proven.
Variable Position Stops
Set precise end stops for 12.5 kg vertical lift fixtures, relying on the external adjuster rather than bulky external mechanical stops.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X75-40 the Right Cylinder?
When sizing this adjustable-stroke family, compare the real 0.5 MPa push figures: the MFJ20 yields 157 N, this MFJ25 provides 245.3 N, and the larger MFJ32 offers 402.2 N. Choose the 25 mm bore when your intermediate load demands roughly 147 N of safe working force and you need the flexibility to dial in the extend end within a 40 mm window during commissioning. The adjuster only shortens the extend stroke; retract remains full, and the fixed TPU bumpers decelerate the stroke end rather than locking the load. If the piston must hold position on air loss, fit an external rod lock or pilot-operated check valve, as a plain cylinder will drift. Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover mount). Because this SKU has no -S magnet, select a magnet-equipped variant if you require CMSG, DMSG or 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 MFJ Adjustable Mini Cylinder MFJ25X75-40 FAQ
This 25 mm bore, double-acting cylinder uses a 1/8" port and a 10 mm rod with an M10x1.25 male thread. It generates 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 maximum of 50 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa and speed is 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 40 mm on site, giving a usable extend window of 35-75 mm; retract remains full. Fixed TPU bumper pads decelerate the stroke end but do not act as a lock. The cylinder will drift on air loss, so use an external rod lock or pilot check valve to hold a load. This SKU has no -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
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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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