Airtac MFJ Adjustable Mini Cylinder MFJ25X30-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X30-30S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 30mm 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
- Stroke30 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 MFJ25X30-30S
Trim the extend stroke by up to 30 mm on site with the AirTAC MFJ25X30-30S, a JIS-standard round-body mini cylinder built for double-acting service. The riveted aluminium covers and SUS304 stainless barrel resist mild washdown, and the body is noticeably shorter than an ISO 6432 unit of the same bore and stroke, saving valuable mounting length. Because this SKU carries the -S suffix, a built-in piston magnet is ready for CMSG, DMSG or EMSG switches.
At 0.5 MPa the 25 mm bore delivers 245.3 N of push force and 206.1 N of pull force, climbing to 343.4 N push at 0.7 MPa with a 1/8" port. The fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range. For sizing, a safe working load is roughly 147 N (about 60 percent of the 0.5 MPa push figure), letting the cylinder lift about 12.5 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ25X30-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X30-30S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 30 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 MFJ25X30-30S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×30 | 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 MFJ25X30-30S Is Used
Changeover Stations
Dial in the extend endpoint within the 30 mm window during format changes, using the 245.3 N push force to position light tooling without swapping cylinders.
Trial Fit Rigs
Perfect for prototype benches where the exact extend position is unknown; tweak the stroke on site while relying on the SUS304 barrel for workshop durability.
Variable Position Stops
Set precise physical stops for sub-12.5 kg loads, using the external adjuster to shorten the extend stroke and the fixed TPU bumpers to soften the impact.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X30-30S the Right Cylinder?
When sizing this adjustable-stroke family, compare the real 0.5 MPa push figures: the MFJ20 gives 157 N, this MFJ25 provides 245.3 N, and the larger MFJ32 offers 402.2 N. The external adjuster here is ideal for trial fits and line changeovers where the exact 0-30 mm extend endpoint is not final, letting you fine-tune without buying a new cylinder. Remember that the bumper only decelerates the stroke end; the piston drifts on air loss, so fit an external rod lock or pilot check valve if the load must be held. Mounting options include LB foot, FA flange and TC trunnion (no SDB), and the -S magnet means you can directly mount CMSG, DMSG or EMSG sensors.
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 MFJ25X30-30S 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, rising 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, and speed ranges from 30 to 800 mm/s.
The external adjuster shortens the extend stroke by up to 30 mm on site without changing the cylinder, while the retract stroke remains full. The -S suffix means a piston magnet is built-in for direct mounting of CMSG, DMSG or EMSG sensors. End-of-travel deceleration is handled by fixed TPU bumper pads, not an adjustable air cushion.
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