Airtac MFJ Adjustable Mini Cylinder MFJ25X25-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X25-30 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 25mm 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
- Stroke25 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 MFJ25X25-30
Trim the extend end by up to 30 mm on site with the external adjuster on this JIS-standard round-body mini cylinder. The riveted SUS304 stainless barrel and aluminium covers yield a shorter overall length than an ISO 6432 unit for the same 25 mm stroke, saving valuable mounting space while resisting mild washdown.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa, the double-acting bore handles light positioning with ease. The fixed TPU bumper pads absorb end-of-stroke impacts across the 30-800 mm/s speed range. This specific SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors; specify the -S variant if you need position detection.
Airtac MFJ Adjustable Mini Cylinder MFJ25X25-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X25-30 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 25 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 MFJ25X25-30
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×25 | 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 MFJ25X25-30 Is Used
Changeover Dial-In
Fine-tune the extend position up to 30 mm during format changeovers on small packaging lines, using the 245.3 N push force to seat light components without external stops.
Prototype Trial Fits
Dial in the exact end point on R&D test rigs where the final stroke is unknown, leveraging the compact JIS body to fit tight prototype enclosures.
Variable Position Stops
Adjust the extend endpoint on the fly for light-duty assembly stations handling parts under 12.5 kg, relying on fixed TPU bumpers for consistent end deceleration.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X25-30 the Right Cylinder?
Choose between the available bores using real 0.5 MPa figures: the MFJ20 provides 157 N of push force, this MFJ25 yields 245.3 N, and the larger MFJ32 offers 402.2 N. The 30 mm adjustable window is ideal for trial fits and line changeovers where the exact extend position is not yet finalised, letting you dial in the end point without buying a new cylinder.
For vertical loads, expect a safe working lift of about 12.5 kg with a 2:1 margin. Note that air loss will cause the piston to drift; the bumper decelerates the stroke but does not lock the rod, so add an external rod lock or pilot check valve if you must hold a load. Mount via LB foot, FA flange, or TC trunnion, and remember the 1/8" port thread.
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 MFJ25X25-30 FAQ
This 25 mm bore double-acting cylinder pushes 245.3 N and pulls 206.1 N at 0.5 MPa. At 0.7 MPa, push is 343.4 N and pull is 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa. It features a 1/8" air port, a 10 mm rod, and an M10x1.25 male rod thread.
The external adjuster shortens the extend stroke by up to 30 mm on site, letting you set the end position without changing the cylinder. It only shortens the extend end and does not act as a mid-stroke lock. The cylinder uses fixed TPU bumper pads for end deceleration, not an adjustable air cushion. Because this SKU lacks the -S magnet, it cannot accept position sensors.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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