Airtac MFJ Adjustable Mini Cylinder MFJ25X40-10
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X40-10 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 MFJ25X40-10
Fine-tune your extend end position on-site with the AirTAC MFJ25X40-10, 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 10 mm (usable extend 30-40 mm) without buying a new unit or adding external stops, making it ideal for trial fits and line changeovers. For the same bore and stroke, this riveted body is shorter than an ISO 6432 cylinder, saving valuable mounting length while resisting mild corrosion and washdown.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa from a 1/8" port, this double-acting actuator provides a safe working load of about 147 N. It lifts roughly 12.5 kg vertically with a 2:1 margin. Fixed TPU bumper pads decelerate the stroke end, and because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ25X40-10 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X40-10 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MFJ25X40-10
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MFJ25X40-10 Is Used
Changeover Stations
Dial in the extend stroke by up to 10 mm during product changeovers to set new end positions without swapping hardware.
Trial Fit Rigs
Perfect for prototype rigs where the exact 30-40 mm extend position is unknown, letting you fine-tune the stop on-site.
Light Pressing
Applies the 245.3 N push force for light assembly tasks, with fixed TPU bumpers absorbing the impact at the stroke end.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X40-10 the Right Cylinder?
Choose the right bore by sizing both ways: the MFJ20 provides 157 N of push force at 0.5 MPa, while the larger MFJ32 offers 402.2 N. This MFJ25 hits a useful middle ground at 245.3 N push (206.1 N pull) at 0.5 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa. The 10 mm adjustable window is perfect for changeover stations where the exact end position is not yet final.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code). Remember that a plain cylinder does not hold its load on air loss—the piston drifts, and the bumper only decelerates near the end. For a held load, specify an external rod lock or pilot check valve. Also, because this SKU has no magnet, you cannot mount position 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 MFJ25X40-10 FAQ
This double-acting cylinder uses a 1/8" port and a 10 mm piston rod. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, increasing to 343.4 N push and 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on-site without changing the full retract. Fixed TPU bumper pads decelerate the stroke end but do not act as a lock; the piston drifts on air loss, so use an external rod lock for holding. This SKU has no magnet, so it cannot take sensors.
Authorized Export Seller
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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