Airtac MFJ Adjustable Mini Cylinder MFJ25X100-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X100-40 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 100mm 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
- Stroke100 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 MFJ25X100-40
Trim the extend end by up to 40 mm on site with the external adjuster on this AirTAC MFJ25X100-40 mini cylinder, giving a usable 60-100 mm forward travel without buying new hardware. It is a JIS-standard round-body unit built with a SUS304 stainless barrel and riveted aluminium covers, delivering a shorter overall mounting length than a comparable ISO 6432 cylinder.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, the 25 mm bore generates 245.3 N of push force and 206.1 N of pull at 0.5 MPa. This translates to a safe working load of roughly 147 N, letting you lift about 12.5 kg vertically with a 2:1 safety margin. The piston rod is Ø10 mm with an M10x1.25 male thread, and fixed TPU bumper pads absorb end-of-stroke impacts.
Airtac MFJ Adjustable Mini Cylinder MFJ25X100-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X100-40 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 100 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 MFJ25X100-40
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×100 | 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 MFJ25X100-40 Is Used
Changeover Stations
Dial in the 60-100 mm extend position during product format changes, using the 40 mm adjustment window to set new stops without swapping the cylinder.
Trial Fit Rigs
Safely test end-of-stroke locations for new tooling with the 245.3 N push force, fine-tuning the 25 mm bore travel before finalizing the design.
Variable Position Stops
Adjust the extend endpoint on the fly for delicate pressing tasks, relying on fixed TPU bumpers to cushion the final impact.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X100-40 the Right Cylinder?
When sizing these adjustable-stroke cylinders, compare the real thrust outputs: the MFJ20 provides 157 N of push force at 0.5 MPa, while the larger MFJ32 jumps to 402.2 N. This 25 mm bore sits comfortably in the middle at 245.3 N, making it ideal for medium-duty trial fits and line changeovers where the exact end position is not final. If you need position sensing, select the -S magnet version for CMSG/DMSG/EMSG switches, as this SKU lacks the magnet and cannot take a sensor. Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Remember that the adjuster only sets the end position; it is not a mid-stroke lock, and the cylinder will drift on air loss—add an external rod lock or pilot check valve to hold a suspended load.
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 MFJ25X100-40 FAQ
This 25 mm bore double-acting cylinder uses a 1/8" air port and a Ø10 mm rod with an M10x1.25 thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 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 external adjuster shortens the extend stroke by up to 40 mm on site, giving a 60-100 mm usable forward travel while retract remains full. Fixed TPU bumper pads decelerate the stroke end, but they do not lock the piston; the cylinder drifts on air loss, so use an external rod lock for holding.
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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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Most inquiries answered within 7-8 hours.
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