Airtac MFJ Adjustable Mini Cylinder MFJ25X50-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X50-20 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 50mm 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
- Stroke50 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 MFJ25X50-20
Dial in your extend end-position on-site with the AirTAC MFJ25X50-20, 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 20 mm, giving a usable 30-50 mm window without buying a new unit or adding external stops.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa, this double-acting actuator is shorter than an ISO 6432 cylinder for the same 25 mm bore and 50 mm stroke. It features a 10 mm rod, 1/8" port, and fixed TPU bumpers. This non-magnet SKU cannot take a sensor; add an -S variant for CMSG/DMSG/EMSG switches.
Airtac MFJ Adjustable Mini Cylinder MFJ25X50-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X50-20 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 50 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 MFJ25X50-20
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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 MFJ25X50-20 Is Used
Changeover Stations
Fine-tune the 30-50 mm extend position during product changeovers, using the adjuster to set stops for varying part sizes without swapping hardware.
Prototype Fit-Ups
Ideal for trial assemblies where the exact reach is unknown, letting you safely test positioning within the 245.3 N push force range before finalizing the design.
Variable Position Stops
Acts as a compact, shorter-than-ISO-6432 stop cylinder in light-duty 25 mm bore fixtures, adjusting the push endpoint on the fly for flexible manufacturing.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X50-20 the Right Cylinder?
When sizing this series, compare the real outputs: the MFJ20 delivers 157 N push at 0.5 MPa, this MFJ25 provides 245.3 N, and the MFJ32 jumps to 402.2 N. Choose the 25 mm bore when you need roughly 147 N of safe working load (about 60% of the 0.5 MPa push figure) or to lift around 12.5 kg vertically with a 2:1 margin.
The 20 mm adjustable window is ideal for trial fits and line changeovers where the exact stroke is not final. Mount via LB foot, FA flange, or TC trunnion (no SDB). Note that the bumper only decelerates the end of stroke; it is not a lock, so fit an external rod lock or pilot check valve if you must hold a load on air loss.
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 MFJ25X50-20 FAQ
This 25 mm bore cylinder has a 1/8" port and a 10 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 20 mm (usable 30-50 mm); retract remains full. Fixed TPU bumpers decelerate the stroke end but do not lock the piston. This non-magnet SKU cannot take a sensor; you need the -S variant for CMSG/DMSG/EMSG switches.
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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