Airtac MFJ Adjustable Mini Cylinder MFJ25X75-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X75-30 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 75mm 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
- Stroke75 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 MFJ25X75-30
Trimming the extend stroke by up to 30 mm on-site, the AirTAC MFJ25X75-30 eliminates the need for external stops or swapping cylinders during line changeovers. This double-acting, JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, giving you a mounting envelope that is noticeably shorter than a comparable ISO 6432 unit.
Operating on a 1/8" port with a 10 mm rod, it delivers 245.3 N of push force at 0.5 MPa. For practical sizing, this translates to a safe working load of roughly 147 N, or lifting about 12.5 kg vertically with a 2:1 safety margin. The fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range.
Airtac MFJ Adjustable Mini Cylinder MFJ25X75-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X75-30 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 75 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 MFJ25X75-30
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×75 | 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 MFJ25X75-30 Is Used
Changeover Stations
Dial in the extend position within the 30 mm window during product format changes, avoiding the downtime of physically swapping out cylinders for different stop lengths.
Trial Fit Rigs
Perfect for prototyping and test fixtures where the exact extend endpoint is unknown, letting engineers fine-tune the 245.3 N push stroke on the fly.
Variable Position Stops
Act as a dynamic hard stop for light assembly tooling, using the adjuster to set the precise 45 to 75 mm extend distance without adding external mechanical stops.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X75-30 the Right Cylinder?
When sizing this adjustable unit, compare it directly against the adjacent bores: the MFJ20 provides 157 N of push force at 0.5 MPa, while the MFJ32 jumps to 402.2 N. The MFJ25X75-30 sits comfortably in the middle at 245.3 N, making it ideal for moderate loads where the exact end position is still being finalized during commissioning. The external adjuster lets you dial in the extend end within a 45 to 75 mm window, but it only shortens the stroke and cannot extend it beyond the 75 mm base.
Keep in mind that the fixed TPU bumpers decelerate the piston but do not function as a lock; if air pressure drops, the piston will drift, so you will need an external rod lock or pilot check valve for secure load holding. This specific SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors without upgrading to the -S variant. Mounting options include LB foot, FA flange, and TC trunnion brackets.
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 MFJ25X75-30 FAQ
This 25 mm bore 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 30 mm on-site, giving a usable extend range of 45 to 75 mm. The retract stroke remains full. The fixed TPU bumpers only decelerate the stroke end; they do not lock or hold the load, so an external rod lock is required if you need to prevent drift on air loss.
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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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