The AirTAC Airtac MF Mini Cylinders MF25X250SU is a genuine double acting 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.
With a 25 mm bore pushing 245.3 N at 0.5 MPa, the MF25X250SU is a double-acting, JIS-standard round-body mini cylinder with a 250 mm stroke. Its SUS304 stainless barrel is joined to aluminium-alloy front and back covers by a riveted rolling-packed structure, and for the same bore and stroke the body runs shorter than an ISO 6432 cylinder - a genuine saving when fixture space is tight. The 1/8 in air port, 10 mm rod and M10x1.25 male rod thread are fixed by the 25 mm bore.
The piston's heterogeneous two-way seal retains an oil film for long seal life, while fixed TPU bumper pads and a front-cover anti-impact pad soften the stroke end (they decelerate only - adjustable air cushioning is the MFC variant's job). Because the SU code includes the -S magnet, CMSG, DMSG or EMSG switches can be clamped on for position feedback. In practice, plan on about 147 N of usable force at 0.5 MPa - roughly 60% of the 245.3 N rating - which corresponds to lifting about 12.5 kg vertically with a 2:1 margin. This version has the U flat-end back cover, and note that when air is lost or the valve centres the rod simply drifts; an external rod lock or pilot check valve is needed to hold a load.
| Model | Airtac MF Mini Cylinders MF25X250SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| 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.
| 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.
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 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.
A 250 mm stroke reaches across a carton blank on a case packer, and the 245.3 N push at 0.5 MPa tucks stubborn flaps home; the shorter-than-ISO 6432 body keeps the station frame slim.
Mounted on TC trunnions, the cylinder kicks misfilled bottles off a conveyor in under a second at 30-800 mm/s, with the -S magnet confirming gate position to the PLC.
The about 147 N working force at 0.5 MPa presses ribbon connectors into boards without damage, while the SUS304 barrel shrugs off flux-residue wipe-downs.
Size both ways before committing: at 0.5 MPa the next bore down, the MF20, delivers 157 N, while the MF32 steps up to 402.2 N - the MF25X250SU fits work sitting between those classes, around 147-240 N per cylinder after margin. Mounting choices are LB foot, FA flange, SDB pivot block or TC trunnion, with CA pivot, U flat-end (this model) or CM round-end back covers on the same body. The 250 mm stroke sits comfortably inside the 500 mm standard range, but keep side loads off the 10 mm rod over the long span to avoid bending. Since a plain cylinder cannot hold position when the valve is centred, add a pilot-operated check valve or external rod lock for any suspended load.
Quick checklist
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa that rises to 343.4 N push and 288.5 N pull. Theoretical maximum is 50 kgf at 1.0 MPa. Working pressure spans 0.15-1.0 MPa, speed 30-800 mm/s, temperature -20 to +70 C, and the bore-fixed 1/8 in port takes PT thread as standard (G or NPT on request).
S means the piston magnet is built in, so CMSG, DMSG or EMSG reed or electronic switches mount directly on the SUS304 barrel for end-of-stroke or mid-stroke signalling - without the magnet, no sensor can be fitted. U is the flat-end back cover style; CA pivot and CM round-end are the alternatives, and LB foot, FA flange, SDB pivot-block or TC trunnion mountings bolt to the same riveted body.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.