Airtac MFJ Adjustable Mini Cylinder MFJ25X45-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X45-30S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 45mm 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
- Stroke45 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 MFJ25X45-30S
Trimming the extend stroke by up to 30 mm on site, this double-acting JIS-standard round-body mini cylinder eliminates the need for external stops during line changeovers. The SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown. Equipped with a 1/8" port and a Ø10 mm rod, it delivers 245.3 N of push force at 0.5 MPa. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG or EMSG position sensing.
The external adjuster allows you to fine-tune the usable extend from 15 to 45 mm without buying a new actuator. With a safe working load around 147 N, it lifts about 12.5 kg vertically with a 2:1 safety margin. Fixed TPU bumper pads decelerate the piston at the stroke ends, operating reliably at speeds of 30-800 mm/s.
Airtac MFJ Adjustable Mini Cylinder MFJ25X45-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X45-30S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 45 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 MFJ25X45-30S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×45 | 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 MFJ25X45-30S Is Used
Changeover Stations
Dial in the exact extend position for different product sizes using the 30 mm adjuster, avoiding the need to swap out actuators during format changes.
Trial Fit Rigs
Safely test end-of-stroke positions on prototype assemblies with 245.3 N of push force, fine-tuning the travel before finalizing the mechanical stops.
Variable Position Stops
Provide adjustable physical endpoints for clamping mechanisms, leveraging the built-in magnet for immediate position feedback.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X45-30S the Right Cylinder?
When sizing this actuator, compare the real thrust figures: the MFJ20 provides 157 N of push at 0.5 MPa, this MFJ25 hits 245.3 N, and the larger MFJ32 outputs 402.2 N. Choose the 25 mm bore when your fixture demands moderate force in a tight footprint. The 30 mm adjustment window is perfect for trial fits where the exact end position is unknown until the machine is commissioned.
For mounting, use LB foot, FA flange, or TC trunnion brackets (SDB and back-cover options are absent on this adjustable build). Note that the bumper pads only decelerate the stroke end; they do not function as a lock. If gravity or air loss could cause the piston to drift and drop a load, install an external rod lock or pilot 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 MFJ25X45-30S FAQ
This double-acting cylinder features a 1/8" port and a Ø10 mm piston 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 30 mm (usable extend 15-45 mm); it sets the end position and is not a mid-stroke lock. The -S suffix indicates a built-in piston magnet for use with CMSG, DMSG, or EMSG sensors, while fixed TPU bumpers absorb end impacts.
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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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