Airtac MTF Mini Cylinder MTF25X40U
The AirTAC Airtac MTF Mini Cylinder MTF25X40U is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 mm
- Port size1/8"
- Acting typeSingle acting, pull (spring return)
- 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 MTF Mini Cylinder MTF25X40U
Generating 153.6 N of pull force at 0.5 MPa, this single-acting spring-return mini cylinder uses air to retract the rod while an internal spring pushes it back out. Because the spring holds the piston normally extended, the mechanism fails safely to the extended position upon air loss, making it optimal for spring-open and air-close tasks. The quoted pull force is already net of the spring resistance, and a minimum of 0.2 MPa is required to overcome it.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, the body is deliberately shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. This 25 mm bore version features a 1/8 inch port, a 10 mm rod with an M10x1.25 male thread, and fixed TPU bumper pads for end-of-stroke deceleration. For practical sizing, a 2:1 safety margin yields an effective vertical lift capacity of roughly 7.8 kg. Note this specific SKU lacks a magnet and cannot host position sensors; adding the -S option enables CMSG, DMSG, or EMSG switches.
Airtac MTF Mini Cylinder MTF25X40U Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF25X40U |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Single acting, pull (spring return) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Fixed TPU bumper pads |
| Max standard stroke | Up to 150 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 | Pull force (spring return) |
|---|---|
| 0.5 MPa | 153.6 N |
| 0.7 MPa | 236.0 N |
Single-acting pull: the spring extends the rod; air retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MTF Mini Cylinder MTF25X40U
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MTF Mini Cylinder MTF25X40U Is Used
Tensioning Mechanisms
Pulls with 153.6 N at 0.5 MPa to maintain strap or web tension, releasing the load only when compressed air retracts the rod.
Fail-Safe Open Valves
Holds a valve open via spring force; air pressure pulls the 10 mm rod inward to close it, ensuring the system vents safely on air loss.
Clamp Release
Retracts a packaging clamp using air, allowing the internal spring to push the rod out and secure the package when air is removed.
Is the Airtac MTF Mini Cylinder MTF25X40U the Right Cylinder?
When sizing this unit, compare its 153.6 N pull at 0.5 MPa against the adjacent bores: step down to the MTF20 for 93.4 N, or step up to the MTF32 for 266.8 N. Choose this single-acting pull configuration when the application requires tensioning, closing, or a fail-safe return to the extended position. Ensure your air supply meets the 0.2 MPa floor to retract the rod against the spring. The U flat-end back cover suits direct rear mounting, and you can pair it with LB foot, FA flange, SDB pivot, or TC trunnion hardware.
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 0.2 – 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 MTF Mini Cylinder MTF25X40U FAQ
This 25 mm bore cylinder provides a single-acting pull force of 153.6 N at 0.5 MPa and 236 N at 0.7 MPa, measured net of the spring. It requires a minimum operating pressure of 0.2 MPa to retract the rod, with a maximum of 1.0 MPa.
No, this specific SKU does not include a magnet and cannot accept CMSG, DMSG, or EMSG sensors. You must select the -S variant for position sensing. Additionally, the spring always drives the rod to the extended position on air loss; it will not hold a mid-stroke load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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