Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 125mm 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
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
- 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 MFCJ Adjustable Mini Cylinder MFCJ25X125-20
Trim the extend stroke by up to 20 mm on site with the AirTAC MFCJ25X125-20, a JIS-standard round-body mini cylinder built from an SUS304 stainless barrel and riveted aluminium covers. This double-acting actuator pushes with 245.3 N at 0.5 MPa and pulls with 206.1 N, while needle-set variable air cushions at both ends soak up high-speed end-of-stroke shock for smooth, quiet motion. The 1/8" air port and M10x1.25 male rod thread simplify integration, and the riveted body is noticeably shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length.
Because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG magnetic switches. For sizing context, the 245.3 N output at 0.5 MPa translates to a safe working load of roughly 147 N, lifting about 12.5 kg vertically with a 2:1 safety margin. Remember that the external adjuster only sets the end position between 105 and 125 mm, and the cushions merely decelerate the piston, they do not lock the load or hold position if air pressure drops.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 125 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MFCJ Adjustable Mini Cylinder MFCJ25X125-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×125 | 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 MFCJ Adjustable Mini Cylinder MFCJ25X125-20 Is Used
Sorting Diverter
Tune the 105-125 mm extend reach on the fly to deflect lightweight packages of varying widths, relying on the 147 N safe working load and air cushions to handle fast cycling.
Component Press Fit
Dial in the exact 20 mm adjustment window for delicate electronic connector seating, using the needle cushions to prevent impact damage at high operating speeds.
Pallet Stopper Gate
Adjust the stop position for different pallet depths while the variable air cushions absorb the kinetic energy of incoming goods without requiring a hard bumper.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X125-20 the Right Cylinder?
When sizing this adjustable-stroke actuator, weigh the 245.3 N push force at 0.5 MPa against the adjacent bores: the MFCJ20 delivers 157 N for lighter tasks, while the MFCJ32 jumps to 402.2 N for heavier loads. The 20 mm extend trim window and dual variable air cushions make the MFCJ25X125-20 ideal for high-speed changeovers or shock-sensitive trial fits where both the end position and deceleration need on-site tuning. Mounting options include LB foot, FA flange, and TC trunnion, but there is no SDB or back-cover mount available. If your application requires position holding on air loss, add an external rod lock or pilot-operated check valve, as the cushion only decelerates and the piston will drift without pressure.
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 MFCJ Adjustable Mini Cylinder MFCJ25X125-20 FAQ
This 25 mm bore cylinder features a 1/8" air port and an M10x1.25 male rod thread. 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.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must choose the -S variant for position sensing, and note that the external adjuster only shortens the extend stroke, it does not act as a mid-stroke lock.
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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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