Airtac MTF Mini Cylinder MTF40X25SCA
The AirTAC Airtac MTF Mini Cylinder MTF40X25SCA is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeSingle acting, pull (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF40X25SCA
Delivering a robust 434.8 N of pull at 0.5 MPa, this JIS-standard round-body mini cylinder is engineered for single-acting tension and fail-safe-open tasks. The internal spring constantly holds the rod extended, while applying air to the 1/4 inch port retracts it. Because the spring drives the piston out, any loss of air pressure forces the rod back to its extended rest state.
Built with a SUS304 stainless barrel and riveted aluminium covers, the body is shorter than an equivalent ISO 6432 unit, saving valuable machine space. This -S variant includes a piston magnet for CMSG, DMSG or EMSG sensors, and the CA back cover provides a rear pivot mount. The quoted pull is net of the spring, yielding a safe working load of roughly 261 N or a 22.2 kg vertical lift with a 2:1 margin.
Airtac MTF Mini Cylinder MTF40X25SCA Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X25SCA |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull (spring return) |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Pull force (spring return) |
|---|---|
| 0.5 MPa | 434.8 N |
| 0.7 MPa | 645.8 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 MTF40X25SCA
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MTF40X25SCA Is Used
Heavy-Duty Tensioning
Pulls and holds cables or webs taut with up to 434.8 N force at 0.5 MPa, releasing tension instantly when air is applied.
Fail-Safe Open Valves
Keeps a heavy process valve open by spring force, automatically snapping it to the extended open position during compressed air failures.
Vertical Load Retraction
Lifts and holds a 22.2 kg platen vertically against gravity using air, relying on the spring to lower the load safely when vented.
Is the Airtac MTF Mini Cylinder MTF40X25SCA the Right Cylinder?
When sizing this 40 mm bore, compare its 434.8 N pull at 0.5 MPa against the next size down: the MTF32 delivers 266.8 N, making this model the clear choice when you need heavier tensioning. As 40 mm is the largest available MTF bore, you cannot step up further within this series. It requires at least 0.2 MPa of air pressure to overcome the return spring.
Select this unit for spring-open, air-close operations where losing air must result in the rod extending outward. The CA rear pivot suits articulated mechanisms, and the integrated magnet allows direct position sensing without external switches.
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 MTF40X25SCA FAQ
This 40 mm bore cylinder provides a net pull force of 434.8 N at 0.5 MPa and 645.8 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal spring, with a maximum limit of 1.0 MPa.
The spring constantly extends the rod and air retracts it, meaning the cylinder fails to the extended position on air loss. It cannot hold a load at an arbitrary mid-stroke point; for that you would need a double-acting MF cylinder with an external rod lock.
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