Airtac MTF Mini Cylinder MTF40X125SCM
The AirTAC Airtac MTF Mini Cylinder MTF40X125SCM is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 mm
- Port size1/4"
- Acting typeSingle acting, pull (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF40X125SCM
Delivering a robust 434.8 N of pull force at 0.5 MPa, this AirTAC MTF40X125SCM mini cylinder is engineered for single-acting pull operations. The internal spring normally holds the rod extended, while applying air to the 1/4 inch port retracts it. Because it fails to the extended position on air loss, it is perfectly suited 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, it provides excellent mild corrosion and washdown resistance. It is notably shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG switches, while the CM back cover provides a round-end rear mounting interface. With a 16 mm rod and M14x1.5 male thread, it handles a safe working load of roughly 261 N, or about 22.2 kg of vertical lift with a 2:1 margin.
Airtac MTF Mini Cylinder MTF40X125SCM Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X125SCM |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 MTF40X125SCM
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 MTF40X125SCM Is Used
Heavy-Duty Tensioning
Uses the 434.8 N net pull force at 0.5 MPa to draw heavy belting or webbing tight, releasing tension instantly when air is removed and the spring extends.
Fail-Safe-Open Gate
Keeps a heavy access hatch closed via air pressure, with the internal spring automatically pushing the rod out to force the gate open during an air loss event.
Vertical Load Retraction
Pulls a 22.2 kg load upward against gravity with a 2:1 safety margin, relying on the spring to lower the load safely to the extended rest position.
Is the Airtac MTF Mini Cylinder MTF40X125SCM the Right Cylinder?
When sizing this 40 mm bore model, evaluate both ends of the range. If 434.8 N of pull at 0.5 MPa is excessive, step down to the MTF32, which yields 266.8 N at the same pressure; no larger MTF bore exists. This single-acting pull configuration is optimal for tensioning, clamping pulls, or fail-safe-open mechanisms where the spring must drive the rod out upon air loss. Ensure your air supply meets the 0.2 MPa floor to retract the rod against the spring. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion, and the integrated magnet (-S) supports position sensing.
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 MTF40X125SCM FAQ
This 40 mm bore cylinder provides a single-acting pull force of 434.8 N at 0.5 MPa and 645.8 N at 0.7 MPa, measured net of the spring. It requires a minimum operating pressure of 0.2 MPa to overcome the spring and retract the rod, up to a maximum of 1.0 MPa.
The internal spring constantly extends the rod, meaning air is only used to pull it in, and the cylinder fails to the extended position on air loss. The -S suffix denotes a built-in magnet for CMSG, DMSG, or EMSG switches. It features a SUS304 stainless barrel, fixed TPU bumper pads, and a CM round-end rear cover.
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