Airtac MFJ Adjustable Mini Cylinder MFJ25X300-100S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X300-100S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 300mm 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
- Stroke300 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 MFJ25X300-100S
Trim the extend stroke by up to 100 mm directly on the machine with the AirTAC MFJ25X300-100S, a JIS-standard round-body mini cylinder built for double-acting service. The external adjuster lets you dial the usable extension down from the 300 mm maximum to exactly where the job needs it, avoiding the cost and delay of ordering a non-standard unit or adding external stops. Its SUS304 stainless barrel shrinks overall length compared to an ISO 6432 cylinder of the same bore and stroke, while resisting mild washdown corrosion.
In the 25 mm bore class this unit delivers 245.3 N of push force at 0.5 MPa, yielding a safe working load of roughly 147 N or a 2:1 vertical lift capacity of about 12.5 kg. The riveted aluminium covers and fixed TPU bumper pads handle end-of-stroke deceleration without requiring an adjustable air cushion. Because this SKU carries the -S magnet, it is ready to accept CMSG, DMSG or EMSG reed and electronic switches for position sensing.
Airtac MFJ Adjustable Mini Cylinder MFJ25X300-100S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X300-100S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MFJ25X300-100S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MFJ25X300-100S Is Used
Changeover Stations
Dial in the extend position during product format changes using the 100 mm window, avoiding the need to physically swap out cylinders for different packaging sizes.
Trial Fit Rigs
Safely test end positions on prototype assemblies with the 245.3 N push force, backing off the adjuster until the tooling clears without machining new hard stops.
Variable Position Stops
Set precise extend limits up to 300 mm for light pressing tasks, leveraging the 12.5 kg vertical lift capacity to seat components without over-travel.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X300-100S the Right Cylinder?
Choose the 25 mm bore when you need more force than the 20 mm option (157 N at 0.5 MPa) but want a tighter envelope than the 32 mm version (402.2 N at 0.5 MPa). The 100 mm adjustment window is especially useful during trial fits and line changeovers where the exact extend position is not yet finalised. You can set the end point on-site without swapping the cylinder.
Mounting options include LB foot, FA flange and TC trunnion (there is no SDB or back-cover option on this adjustable build). The 1/8" port and M10x1.25 male rod thread match standard 25 mm fittings. Remember that the fixed TPU bumpers only decelerate the stroke end; they do not lock the rod. If the load must be held on air loss, install an external rod lock or pilot-operated check valve.
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 MFJ25X300-100S FAQ
This 25 mm bore cylinder has a 1/8" port and delivers 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. The theoretical maximum force is 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm on-site, giving a usable extend range of 200-300 mm. It uses fixed TPU bumper pads to decelerate the stroke end rather than an adjustable air cushion. The included -S magnet allows CMSG, DMSG or EMSG switches to be fitted.
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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