Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50 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 MFJ25X50-50
Dial in your extend end-position on the fly with the AirTAC MFJ25X50-50, 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 50 mm directly on the machine, which is invaluable for trial fits and line changeovers where the exact travel is not yet final. Because the body is inherently shorter than an ISO 6432 cylinder for the same 25 mm bore and 50 mm stroke, it saves valuable mounting length without conforming to that standard.
This double-acting actuator delivers 245.3 N of push force and 206.1 N of pull force at 0.5 MPa, peaking at a theoretical 50 kgf at 1.0 MPa. The 1/8" port and Ø10 mm rod with an M10x1.25 male thread handle these loads effectively, while fixed TPU bumper pads decelerate the stroke ends. Note that this specific SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors without switching to the -S variant.
Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50 |
|---|---|
| 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 MFJ25X50-50
| 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 MFJ25X50-50 Is Used
Changeover Stations
Shorten the extend stroke by up to 50 mm on-site to accommodate different product sizes during quick line changeovers, avoiding the need to swap out entire cylinders.
Trial Fit Rigs
Perfect for prototype testing where the exact end position is unknown, letting technicians dial in the 245.3 N push stroke precisely before finalizing the mechanical design.
Variable-Position Stops
Act as an adjustable mechanical stop for light pressing or clamping tasks, safely handling loads around 147 N while fine-tuning the travel limit within the 50 mm window.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50 the Right Cylinder?
When sizing this actuator, compare the real thrust figures across the range: the MFJ20 provides 157 N of push force at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 jumps to 402.2 N. If your fixture demands roughly 147 N of safe working load (about 60% of the 0.5 MPa rating) or needs to lift around 12.5 kg vertically with a 2:1 safety margin, the 25 mm bore is the correct choice. The 50 mm adjustable window is perfect for variable-position stops where you need flexibility.
Keep in mind that the external adjuster only sets the extend end position; it does not function as a mid-stroke lock. If air pressure drops, the piston will drift, so install an external rod lock or pilot-operated check valve for fail-safe load holding. For mounting, you can use LB foot, FA flange, or TC trunnion brackets (there is no SDB or back-cover option here). Also, because this SKU has no -S magnet, position sensing is unavailable unless you specify the magnet-equipped version.
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 MFJ25X50-50 FAQ
This 25 mm bore cylinder features a 1/8" port and a Ø10 mm rod. At 0.5 MPa it provides 245.3 N push and 206.1 N pull force. At 0.7 MPa it delivers 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 50 mm to set the end position, while fixed TPU bumper pads decelerate the impact. It is not a mid-stroke lock, and the cylinder cannot hold a load on air loss—you need an external rod lock or pilot check valve for that. Also, this non-S SKU lacks a magnet, so it cannot take position 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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