Airtac MTF Mini Cylinder MTF40X30SU
The AirTAC Airtac MTF Mini Cylinder MTF40X30SU is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 30mm 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
- Stroke30 mm
- Port size1/4"
- Acting typeSingle acting, pull (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF40X30SU
Delivering a robust 434.8 N pull at 0.5 MPa, this JIS-standard round-body mini cylinder is engineered for heavy-duty tensioning and air-close tasks. The MTF40X30SU uses a SUS304 stainless barrel with riveted aluminium covers, resisting mild corrosion and washdown environments while saving mounting length compared to ISO 6432 equivalents.
As a single-acting pull type, an internal spring holds the 16 mm rod extended at rest; supplying air to the 1/4 inch port retracts it. This fail-safe-to-extended behaviour suits spring-open mechanisms. The quoted pull is net of spring force, and the -S suffix enables CMSG, DMSG or EMSG sensors. For sizing, expect a safe working load around 261 N, or roughly 22.2 kg of vertical lift with a 2:1 margin.
Airtac MTF Mini Cylinder MTF40X30SU Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X30SU |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MTF40X30SU
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MTF40X30SU Is Used
Heavy Tensioning
Pulls cables or heavy levers with a 434.8 N net force, retracting on air and letting the spring maintain tension at rest.
Fail-Safe Gate Close
Holds a 40 mm bore gate open via air pressure; upon air loss, the spring automatically drives the rod out to secure the gate.
Vertical Retract
Lifts or lowers loads up to 22.2 kg safely using air, relying on the spring to return the load to the extended start position.
Is the Airtac MTF Mini Cylinder MTF40X30SU the Right Cylinder?
Choose this 40 mm bore when the 266.8 N pull of the MTF32 is insufficient, as it provides 434.8 N at 0.5 MPa. It is the largest bore in the MTF range, so no larger single-acting pull option exists. Apply it to spring-open, air-close systems, ensuring a minimum 0.2 MPa pressure to overcome the spring.
The U flat-end back cover suits tight rear mounting spaces. Fixed TPU bumper pads absorb end-of-stroke impact across the 50-800 mm/s speed range. Because this SKU includes the -S magnet, it is fully compatible with CMSG, DMSG and EMSG 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 MTF40X30SU FAQ
It generates 434.8 N of pull at 0.5 MPa and 645.8 N at 0.7 MPa. A minimum operating pressure of 0.2 MPa is required to overcome the internal return spring and retract the rod.
The spring keeps the rod extended by default; air pressure pulls it in, meaning it fails to the extended position on air loss. The -S suffix denotes a built-in magnet for CMSG, DMSG or EMSG sensors, and the SUS304 body handles washdowns.
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