Airtac MFJ Adjustable Mini Cylinder MFJ25X200-40S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X200-40S 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 MFJ25X200-40S
Trim the extend stroke by up to 40 mm on site with the AirTAC MFJ25X200-40S, a JIS-standard round-body mini cylinder built for 160 to 200 mm usable extension. The SUS304 stainless barrel and riveted aluminium covers yield a shorter overall body than an equivalent ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion. A 1/8" port and Ø10 mm rod deliver 245.3 N of push force at 0.5 MPa.
The integrated -S piston magnet supports CMSG, DMSG and EMSG switches for position sensing. Fixed TPU bumper pads absorb end-of-travel impacts across the 30 to 800 mm/s speed range. Based on the 0.5 MPa push rating, this bore provides a safe working load near 147 N, lifting about 12.5 kg vertically with a 2:1 safety margin.
Airtac MFJ Adjustable Mini Cylinder MFJ25X200-40S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X200-40S |
|---|---|
| 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 MFJ25X200-40S
| 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 MFJ25X200-40S Is Used
Changeover Stations
Dial in the extend position within the 40 mm window during format changes, avoiding the need to swap entire cylinders when product sizes shift.
Prototype Test Rigs
Safely apply up to 147 N of working force to trial components, fine-tuning the 160-200 mm stroke length to find the exact travel endpoint.
Variable Position Stops
Secure precise end-of-stroke damping using fixed TPU bumpers while externally setting the extend limit to accommodate varying part heights.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X200-40S the Right Cylinder?
When sizing this adjustable-stroke family, compare the real thrust outputs: the MFJ20 bore yields 157 N of push force at 0.5 MPa, this MFJ25 provides 245.3 N, and the larger MFJ32 hits 402.2 N. Choose the 25 mm bore when your fixture demands roughly 12.5 kg of vertical lift with a 2:1 margin. The 40 mm external adjuster is ideal for trial fits and line changeovers where the exact end position is not yet final.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover variant exists). The -S magnet enables direct sensor mounting. Remember that the fixed TPU bumpers only decelerate the stroke end; they do not lock the piston. If air pressure drops, the load will drift, so fit an external rod lock or pilot check valve for secure holding.
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 MFJ25X200-40S FAQ
This 25 mm bore cylinder features a 1/8" port and a Ø10 mm rod. 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 40 mm on site (usable extension 160-200 mm); it does not add stroke beyond the 200 mm base and is not a mid-stroke lock. The -S suffix denotes a built-in piston 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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