Airtac MFJ Adjustable Mini Cylinder MFJ25X80-100S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X80-100S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 80mm 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
- Stroke80 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 MFJ25X80-100S
Trimming the extend end by up to 100 mm on site, this double-acting JIS-standard round-body mini cylinder removes the need to swap hardware when finalizing a 0-80 mm usable stroke. The SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, while resisting mild washdown. A 1/8" port feeds the 25 mm bore, yielding 245.3 N of push force at 0.5 MPa.
The integrated piston magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing. Fixed TPU bumper pads decelerate the stroke ends. For sizing, this bore provides a safe working load around 147 N (roughly 60 percent of the 0.5 MPa push figure), lifting about 12.5 kg vertically with a 2:1 safety margin. The external adjuster sets end position and is never a mid-stroke lock.
Airtac MFJ Adjustable Mini Cylinder MFJ25X80-100S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X80-100S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 80 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 MFJ25X80-100S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | 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 MFJ25X80-100S Is Used
Changeover Stations
Dial in the extend position on the fly during product changeovers. The 100 mm adjustment window lets operators hit new stops without swapping the cylinder.
Trial Fit Rigs
Perfect for prototyping where the final extend length is unknown. Safely push a 147 N working load while fine-tuning the end position within the 0-80 mm usable range.
Variable Position Stops
Replace hard mechanical stops with the external adjuster. The 245.3 N push force at 0.5 MPa handles intermediate positioning tasks cleanly.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X80-100S the Right Cylinder?
When sizing between the available bores, the MFJ20 provides 157 N of push at 0.5 MPa, while the MFJ32 steps up to 402.2 N. This 25 mm bore sits in the middle at 245.3 N, making it ideal for medium-duty trial fits and changeover stations where the exact extend position is not final. You can dial the stroke down by up to 100 mm without buying a new cylinder or adding external stops.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover). Because the -S magnet is present, you can fit CMSG, DMSG or EMSG sensors directly. Remember that a plain cylinder drifts on air loss; the bumper only decelerates the end of travel. Specify an external rod lock or pilot check valve if the load must be held.
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 MFJ25X80-100S FAQ
This 25 mm bore 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, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm on site, giving a usable extend range of 0-80 mm; the retract stroke remains full. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG sensors. Fixed TPU bumper pads decelerate the stroke ends, but the adjuster is not a mid-stroke lock.
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Genuine AirTAC parts produced by AirTAC factory.
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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