Airtac MFJ Adjustable Mini Cylinder MFJ25X80-75S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X80-75S 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 MFJ25X80-75S
Trimming the extend stroke by up to 75 mm on site, the AirTAC MFJ25X80-75S lets you dial in the exact end position without swapping hardware. This double-acting JIS-standard round-body mini cylinder uses a SUS304 stainless barrel and riveted aluminium covers, yielding a shorter mounting envelope than an ISO 6432 unit of the same bore.
Driven by a Ø10 mm rod through a 1/8" port, it delivers 245.3 N of push force at 0.5 MPa. Factoring a 60% safety margin yields a safe working load of roughly 147 N, lifting about 12.5 kg vertically. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG switches, while fixed TPU bumpers absorb end impacts.
Airtac MFJ Adjustable Mini Cylinder MFJ25X80-75S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X80-75S |
|---|---|
| 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 MFJ25X80-75S
| 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 MFJ25X80-75S Is Used
Changeover Stations
Fine-tune the 5 to 80 mm extend position during product format changes, using the 245.3 N output to push light tooling into exact alignment.
Trial Fit Rigs
Dial in the extend endpoint on prototype assemblies without machining new stops, leveraging the 75 mm adjustment window to test multiple reach distances.
Variable Position Stops
Act as an adjustable mechanical end stop for 12.5 kg vertical lift fixtures, shortening the stroke on the fly as process requirements shift.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X80-75S the Right Cylinder?
Choose the MFJ25 when you need 245.3 N push at 0.5 MPa; step down to the MFJ20 for 157 N, or up to the MFJ32 for 402.2 N. The 75 mm adjuster window is ideal for trial fits and line changeovers where the final extend position is unknown, letting you shorten the stroke from the nominal 80 mm down to 5 mm.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover). Remember that the adjuster only sets the extend endpoint and the TPU bumpers merely decelerate; the piston drifts on air loss, so fit an external rod lock or pilot check valve to hold a 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 MFJ25X80-75S FAQ
This 25 mm bore cylinder features a 1/8" port and a Ø10 mm rod. At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa it pushes 343.4 N and pulls 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 75 mm (usable range 5-80 mm); it only sets the endpoint and does not lock mid-stroke. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG sensors, and fixed TPU bumpers decelerate the stroke ends.
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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.
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Most inquiries answered within 7-8 hours.
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