Airtac MFJ Adjustable Mini Cylinder MFJ25X200-20S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X200-20S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 200mm 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
- Stroke200 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 MFJ25X200-20S
Trim the extend stroke by up to 20 mm directly at the fixture with the AirTAC MFJ25X200-20S, giving a usable 180-200 mm forward travel without external stops. This JIS-standard round-body mini cylinder pairs a SUS304 stainless steel barrel with riveted aluminium covers, yielding a shorter mounting envelope than a comparable ISO 6432 unit while resisting mild washdown.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, the Ø10 mm rod delivers 245.3 N push and 206.1 N pull at 0.5 MPa. The built-in piston magnet (-S) supports CMSG, DMSG and EMSG switches, and fixed TPU bumper pads absorb end-of-stroke impacts. The adjuster sets the forward end position; it is not a mid-stroke lock, so fit an external rod lock or pilot check valve if you need to hold a load on air loss.
Airtac MFJ Adjustable Mini Cylinder MFJ25X200-20S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X200-20S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 200 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 MFJ25X200-20S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×200 | 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 MFJ25X200-20S Is Used
Changeover Stations
Dial in the 180-200 mm extend position on the fly during product line changeovers, avoiding the need to swap cylinders or re-machine hard stops.
Trial Fit Rigs
Perfect for prototype assembly rigs where the exact 12.5 kg vertical lift endpoint must be fine-tuned through the 20 mm adjustment window before finalising the design.
Variable Position Stops
Use the external adjuster to set intermediate pushing forces up to 245.3 N without adding bulky external mechanical stops to the machine frame.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X200-20S the Right Cylinder?
Choose the MFJ25 when 245.3 N push at 0.5 MPa fits your load, stepping up to the MFJ32 (402.2 N) for heavier tooling or down to the MFJ20 (157 N) for lighter tasks. With a safe working load around 147 N and a vertical lift capacity of roughly 12.5 kg at a 2:1 margin, this 25 mm bore is ideal for changeover stations where the exact end position is unknown during commissioning. Mount via LB foot, FA flange or TC trunnion (no SDB), and wire up CMSG/DMSG/EMSG sensors directly since the -S magnet is included.
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 MFJ25X200-20S FAQ
This 25 mm bore cylinder uses a 1/8" air port and a Ø10 mm rod with M10x1.25 male thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on-site (180-200 mm usable), while the retract remains full. The -S suffix means a piston magnet is built-in for CMSG/DMSG/EMSG switches. Fixed TPU bumpers decelerate the stroke end, but the cylinder will drift on air loss unless an external rod lock is fitted.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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