Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 225mm 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
- Stroke225 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 MFJ25X225-20
Trim the extend stroke by up to 20 mm on site with the AirTAC MFJ25X225-20, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. The external adjuster lets you set the usable extend between 205 and 225 mm without buying a new unit, while the double-acting piston delivers 245.3 N push and 206.1 N pull at 0.5 MPa through a 1/8" port.
For the same bore and stroke, this riveted body is shorter than an ISO 6432 cylinder, saving valuable mounting length on your fixture. The fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range. Based on the 0.5 MPa push rating, it handles a safe working load of about 147 N, lifting roughly 12.5 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 225 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 MFJ25X225-20
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×225 | 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 MFJ25X225-20 Is Used
Changeover Dial-In
Fine-tune the 205-225 mm extend position on packaging changeover stations without swapping cylinders, using the 20 mm external adjuster to hit new stops instantly.
Prototype Trial Fits
Perfect for R&D rigs where the final end position is unknown, letting engineers shorten the stroke on the fly while moving a 12.5 kg vertical load.
Compact Positioning
Leverage the shorter-than-ISO-6432 body to fit a 245.3 N push force into tight machine frames, adjusting the stroke end to meet varying part dimensions.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X225-20 the Right Cylinder?
When sizing this adjustable series, compare the real thrust figures: 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. Choose the 25 mm bore when your fixture needs moderate force in a tight footprint, and use the 20 mm adjuster window to dial in the exact 205-225 mm extend position during trial fits or line changeovers.
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 holding. This specific SKU lacks a magnet, so it cannot accept CMSG, DMSG or EMSG sensors; you would need the -S variant for position detection. Mounting options include LB foot, FA flange and TC trunnion, with no SDB or back-cover option.
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 MFJ25X225-20 FAQ
This double-acting cylinder has a 25 mm bore, a 10 mm rod with an M10x1.25 male thread, and a 1/8" port. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical max of 50 kgf at 1.0 MPa. The nominal 225 mm stroke can be shortened by up to 20 mm on site.
No. This SKU does not include a magnet, so it cannot accept CMSG, DMSG or EMSG switches; you must order the -S variant for sensing. Additionally, the external adjuster and fixed TPU bumpers only set the end position and decelerate the stroke—they do not act as a brake. The piston will drift on air loss, so use an external rod lock for holding.
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