Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 225mm 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
- Stroke225 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 MFJ25X225-20S
Fine-tune your extend end-position on-site with the AirTAC MFJ25X225-20S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the forward stroke by up to 20 mm, giving a usable extend range of 205 to 225 mm without buying a new unit or adding external stops. Because the MFJ body is shorter than an ISO 6432 cylinder for the same bore and stroke, it saves valuable mounting length in tight machinery.
Delivering 245.3 N of push force and 206.1 N of pull force at 0.5 MPa, this double-acting actuator handles moderate positioning tasks with ease. The built-in -S magnet supports CMSG, DMSG, and EMSG switches for end-of-stroke sensing, while fixed TPU bumper pads decelerate the piston at the stroke ends. For vertical applications, expect a safe working load of about 147 N, lifting roughly 12.5 kg with a 2:1 safety margin.
Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 225 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 MFJ25X225-20S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×225 | 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 MFJ25X225-20S Is Used
Changeover Stations
Dial in the 205-225 mm extend position during product line changeovers, using the 20 mm external adjuster to set new stops for 245.3 N push tasks without swapping hardware.
Trial-Fit Rigs
Perfect for prototype assembly rigs where the exact end position is unknown, letting you shorten the stroke on-site to find the optimal location before finalising the design.
Variable-Position Stops
Act as a compact, JIS-standard variable stop in tight machinery spaces, providing reliable 12.5 kg vertical lift capability while saving mounting length compared to ISO 6432 equivalents.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20S the Right Cylinder?
When sizing this series, compare the real thrust outputs: the MFJ20 provides 157 N of push force at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 delivers 402.2 N. Choose the 25 mm bore when your trial-fit assemblies or changeover stations need that middle force band combined with on-site adjustability. If your exact extend position is not yet finalised, the 20 mm adjustment window prevents costly cylinder swaps during commissioning.
Remember that the external adjuster only sets the end position; it is not a mid-stroke lock. A plain cylinder drifts if air pressure drops, so install an external rod lock or pilot-operated check valve if you must hold a suspended load. This -S model is magnet-ready for CMSG/DMSG/EMSG sensors, and mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover mount is available on this adjustable build). The 1/8" port and M10x1.25 male rod thread match the 25 mm bore standard.
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 MFJ25X225-20S FAQ
This 25 mm bore cylinder features a 1/8" port and a 10 mm rod with an M10x1.25 male thread. It generates 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa, with a theoretical max of 50 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 20 mm on-site, giving a usable forward range of 205-225 mm; retract remains full. Fixed TPU bumper pads decelerate the piston at the stroke ends, but this is not an adjustable air cushion. The built-in -S magnet allows CMSG, DMSG, and EMSG switches to be fitted for position sensing.
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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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