Airtac MFJ Adjustable Mini Cylinder MFJ25X250-75S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X250-75S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MFJ25X250-75S
Dial in your extend end-position on-site with the AirTAC MFJ25X250-75S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 75 mm, giving a usable extend window of 175 to 250 mm while keeping the full retract stroke. Because the body is shorter than a comparable ISO 6432 unit, it saves valuable mounting length without conforming to that standard.
This double-acting 25 mm bore cylinder pushes with 245.3 N and pulls with 206.1 N at 0.5 MPa, peaking at a theoretical 50 kgf at 1.0 MPa. It uses a 1/8" port and a Ø10 mm rod with an M10x1.25 male thread. The built-in magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing. For a safe working load, expect around 147 N, lifting about 12.5 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ25X250-75S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X250-75S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MFJ25X250-75S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MFJ25X250-75S Is Used
Changeover Stations
Fine-tune the 175-250 mm extend position during product format changes, using the 75 mm adjuster to set new stops rapidly without swapping hardware.
Prototype Test Rigs
Safely probe and set exact end-of-stroke contact points for 12.5 kg vertical test loads, tweaking the travel on the fly until the kinematics are proven.
Variable Position Stops
Push 245.3 N into clamps or stops where the final location shifts between batches, relying on the external adjuster rather than mechanical shims.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X250-75S the Right Cylinder?
Choose the MFJ25 when you need 245.3 N of push force at 0.5 MPa; drop down to the MFJ20 for lighter 157 N loads, or step up to the MFJ32 for 402.2 N if your fixture requires more thrust. The 75 mm adjustable window is perfect for trial fits and line changeovers where the exact extend position is not yet finalised, letting you fine-tune travel without buying a new cylinder or adding external stops. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover here).
Remember that the fixed TPU bumper pads only decelerate the stroke end—they do not lock the rod. If air pressure drops, the piston will drift, so install an external rod lock or pilot-operated check valve for fail-safe load holding. This -S model is ready for CMSG, DMSG, or EMSG sensors out of the box.
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 MFJ25X250-75S FAQ
This 25 mm bore cylinder uses a 1/8" port and a Ø10 mm 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 75 mm on-site (usable extend 175-250 mm), but it does not act as a mid-stroke lock. The cylinder uses fixed TPU bumper pads to decelerate at the ends rather than an adjustable air cushion. The -S suffix means it has a magnet for CMSG, DMSG, or EMSG 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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