Airtac MFJ Adjustable Mini Cylinder MFJ25X90-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X90-30 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 90mm 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
- Stroke90 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 MFJ25X90-30
Dial in your extend end-position on-site with the AirTAC MFJ25X90-30, a JIS-standard round-body mini cylinder featuring a 30 mm adjustable stroke window. An external adjuster lets you shorten the extend stroke from its 90 mm nominal length down to 60 mm, eliminating the need to buy a new cylinder or add external stops during line changeovers. The SUS304 stainless steel barrel and riveted aluminium covers offer reliable mild-corrosion resistance, while the compact riveted body saves mounting length compared to an ISO 6432 unit of the same bore and stroke.
This double-acting 25 mm bore cylinder delivers 245.3 N of push force and 206.1 N of pull force at 0.5 MPa, peaking at a theoretical 50 kgf at 1.0 MPa. For practical sizing, its 245.3 N push translates to a safe working load of about 147 N, lifting roughly 12.5 kg vertically with a 2:1 safety margin. It uses a 1/8" port and a Ø10 mm piston rod with an M10x1.25 male thread. Note that this specific SKU lacks a magnet, so it cannot accept CMSG/DMSG/EMSG sensors without upgrading to the -S variant.
Airtac MFJ Adjustable Mini Cylinder MFJ25X90-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X90-30 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 90 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 MFJ25X90-30
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×90 | 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 MFJ25X90-30 Is Used
Changeover Stations
Quickly fine-tune the 60-90 mm extend endpoint by up to 30 mm during product changeovers, accommodating different part sizes without swapping hardware.
Trial Fit Rigs
Ideal for prototyping and test fixtures where the exact extend position is unknown, letting you safely dial in the stroke for 245.3 N push operations.
Variable-Position Stops
Acts as an adjustable physical stop for light pressing or locating tasks, securely handling loads up to 147 N without needing external mechanical stops.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X90-30 the Right Cylinder?
When sizing across the MFJ range, compare the real thrust outputs: the 20 mm bore yields 157 N of push at 0.5 MPa, this 25 mm bore provides 245.3 N, and the larger 32 mm bore offers 402.2 N. Choose the MFJ25X90-30 when your application requires moderate force and on-site adjustability for trial fits or variable-position stops. The 30 mm adjuster window is ideal for commissioning rigs where the exact extend endpoint is not yet finalized.
Keep in mind that the fixed TPU bumper pads only decelerate the piston near the stroke end; they do not function as a lock. If your load must be held in place during air loss or when a valve is centered, the piston will drift, requiring an external rod lock or pilot-operated check valve. For mounting, you can utilize LB foot, FA flange, or TC trunnion brackets (SDB and back-cover mounts are not available on this adjustable build).
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 MFJ25X90-30 FAQ
This 25 mm bore cylinder uses a 1/8" port and a Ø10 mm rod. At 0.5 MPa it provides 245.3 N push and 206.1 N pull; at 0.7 MPa it provides 343.4 N push and 288.5 N pull. 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 60-90 mm; retract remains full. The cylinder has fixed TPU bumper pads for end-deceleration, but these do not lock the piston. The piston will drift on air loss, so use an external rod lock for load holding. Also, this non-S SKU lacks a magnet and cannot take sensors.
Authorized Export Seller
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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