Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20S 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 MFJ25X100-20S
Trimming the extend stroke by up to 20 mm directly at the fixture, the AirTAC MFJ25X100-20S lets you dial in the exact end position from 80 to 100 mm without external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, delivering a body that is physically shorter than a comparable ISO 6432 unit to save valuable mounting length.
Driven by a 12 mm piston rod with a 1/8" port, it generates 245.3 N of push force at 0.5 MPa. Factoring a 60 percent safety margin yields a safe working load of roughly 147 N, letting the cylinder lift about 12.5 kg vertically. The built-in magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing, while fixed TPU bumpers absorb end-of-stroke impacts.
Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20S |
|---|---|
| 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 MFJ25X100-20S
| 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 MFJ25X100-20S Is Used
Changeover Stations
Fine-tune the 80 to 100 mm extend position on the fly for different part sizes, using the 245.3 N output to push lightweight actuators without retooling.
Trial Fit Rigs
Dial in the exact extend distance during prototype assembly, relying on the 20 mm adjustment window to find the optimal stop before finalizing the design.
Variable Position Stops
Adjust the end point on-site to act as a movable hard stop for 12.5 kg vertical lifts, avoiding the need to physically swap out cylinders for each new task.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X100-20S the Right Cylinder?
When sizing this series, compare the actual outputs: the MFJ20 provides 157 N of push force at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 delivers 402.2 N. Choose the 25 mm bore when your fixture demands moderate force in a tight footprint, and rely on the 20 mm adjustment window to perfect the extend position during line changeovers or trial fits.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Remember that the external adjuster only sets the extend end point; it is not a mid-stroke lock. Because the piston drifts on air loss, install an external rod lock or pilot check valve if the load must be held in place.
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 MFJ25X100-20S FAQ
This double-acting cylinder uses a 1/8" port and generates 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa, with an operating speed range of 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 20 mm (usable range 80-100 mm); it only sets the end position and does not act as a brake. The -S suffix denotes a built-in piston magnet for CMSG, DMSG, or EMSG sensors, and fixed TPU bumpers decelerate the stroke ends.
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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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