Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-75S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-75S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MFCJ25X250-75S
Trim the extend stroke by up to 75 mm on site with the MFCJ25X250-75S, a JIS-standard round-body mini cylinder built from SUS304 stainless steel and riveted aluminium covers. The external adjuster lets you set the extend end anywhere from 175 to 250 mm, while the needle-variable air cushion at both ends soaks up high-speed shock. Because the MF body is shorter than an ISO 6432 cylinder for the same bore and stroke, it saves mounting length without conforming to that standard.
This double-acting 25 mm bore delivers 245.3 N push and 206.1 N pull at 0.5 MPa, making a safe working load of roughly 147 N or a 12.5 kg vertical lift with a 2:1 margin. The 1/8" port and M10x1.25 male rod thread match standard JIS mini fittings, and the -S suffix means a built-in magnet for CMSG, DMSG or EMSG switches. Note that the cushion only decelerates the piston near stroke end; it is not a lock, so fit an external rod lock or pilot check valve if you need to hold a load on air loss.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-75S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-75S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MFCJ25X250-75S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MFCJ25X250-75S Is Used
Adjustable Tooling Stops
Fine-tune the 175-250 mm extend position on the fly for part variants, using the 245.3 N push force to drive light clamps and stops without swapping cylinders.
High-Speed Diverters
Dial in the exact extend length and rely on the variable air cushion to absorb shock when deflecting packages at high cycle rates.
Trial Fit Rigs
Set the extend end precisely during prototyping, then lock the 75 mm adjuster once the ideal stroke is found for the 12.5 kg vertical lift payload.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-75S the Right Cylinder?
Weigh your force needs against the adjacent bores: the MFCJ20 tops out at 157 N push @0.5 MPa, while the MFCJ32 jumps to 402.2 N. This 25 mm bore sits in the middle at 245.3 N, ideal for medium-light tooling. Choose the 75 mm adjustable window when you need to fine-tune the extend position across changeovers or trial fits, and pair it with the variable air cushion to quiet end-of-stroke impact at speeds up to 800 mm/s.
Mounting options are LB foot, FA flange or TC trunnion (no SDB, no back cover). The -S magnet enables reed or electronic sensors, so you can confirm end-of-stroke position. Remember the adjuster sets the extend end point but does not lock mid-stroke; for fail-safe holding, add a 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 MFCJ Adjustable Mini Cylinder MFCJ25X250-75S 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, 343.4 N push / 288.5 N pull at 0.7 MPa, and a theoretical max of 50 kgf at 1.0 MPa. The piston rod is Ø10 mm with an M10x1.25 male thread.
The external adjuster shortens the extend stroke by up to 75 mm (usable range 175-250 mm), while the needle variable air cushion at both ends decelerates the piston near stroke end. The -S suffix provides a built-in magnet for CMSG, DMSG or EMSG 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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