Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20S 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 MFCJ25X250-20S
Dial in exact extend lengths on-site with this 25 mm bore double-acting mini cylinder, which features a 20 mm adjustable stroke window (usable extend 230-250 mm) and needle-set variable air cushions at both ends to absorb high-speed shock. The riveted SUS304 stainless barrel and aluminium covers form a JIS-standard round body that is physically shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable machine space while resisting mild washdown corrosion.
Delivering 245.3 N push and 206.1 N pull at 0.5 MPa, this unit handles a safe working load of roughly 147 N and lifts about 12.5 kg vertically with a 2:1 margin. The -S suffix denotes a built-in piston magnet ready for CMSG, DMSG or EMSG switches, and the 1/8" port keeps air supply compact for fast 30-800 mm/s cycles.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20S |
|---|---|
| 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 MFCJ25X250-20S
| 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 MFCJ25X250-20S Is Used
Adjustable Tooling Stops
Fine-tune the 230-250 mm extend position on machining fixtures during part changeovers, using the 245.3 N push force to seat components firmly while the air cushion prevents end-of-stroke slamming.
High-Speed Diverter Gates
Actuate sorting flaps on packaging lines at up to 800 mm/s; the needle cushion soaks up the kinetic energy at full extension, protecting the 12 mm rod and 1/8" port assembly from impact wear.
Vertical Lift Stops
Raise lightweight tote boxes up to 12.5 kg in pick modules; the SUS304 stainless body handles mildly humid warehouse environments while the adjustable stop sets the exact raise height.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X250-20S the Right Cylinder?
When sizing this adjustable family, compare the real thrusts: the MFCJ20 yields 157 N of push at 0.5 MPa, this MFCJ25 provides 245.3 N, and the MFCJ32 steps up to 402.2 N. Choose the 25 mm bore when your changeover requires moderate force plus the ability to fine-tune the extend end by up to 20 mm without swapping cylinders. The variable air cushion is ideal for shock-sensitive trial fits at high speed, but remember it only decelerates the piston near the end of travel—it is not a lock.
Because a plain double-acting cylinder drifts when air pressure drops or the valve is centred, add an external rod lock or pilot-operated check valve if the load must hold position. For mounting, select LB foot, FA flange or TC trunnion brackets (SDB and back-cover mounts are not available on this build), and pair the built-in magnet with CMSG, DMSG or EMSG sensors for position feedback.
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 MFCJ25X250-20S FAQ
This 25 mm bore cylinder has a 1/8" air port and an M10x1.25 male rod thread. At 0.5 MPa it generates 245.3 N push and 206.1 N pull; at 0.7 MPa it generates 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa, and the standard speed range is 30-800 mm/s.
The external adjuster shortens the extend stroke by up to 20 mm on-site (yielding a 230-250 mm usable extend), while the retract stroke remains full length. The variable air cushion at both ends uses a needle valve to decelerate the piston near stroke end for smooth high-speed motion, but it is not a brake. The -S suffix means it includes a piston magnet for CMSG, DMSG or EMSG position 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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