Airtac MTF Mini Cylinder MTF40X20SCA
The AirTAC Airtac MTF Mini Cylinder MTF40X20SCA is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 mm
- Port size1/4"
- Acting typeSingle acting, pull (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF40X20SCA
Delivering a robust 434.8 N of net pull force at 0.5 MPa, this JIS-standard round-body mini cylinder utilizes a SUS304 stainless barrel and riveted aluminium covers to resist mild corrosion and washdown environments. The MTF40X20SCA operates as a single-acting pull, spring-return unit; an internal spring constantly pushes the 16 mm rod out to its extended rest position, while supplying air to the 1/4 inch port retracts it inward. Because the spring actively holds the rod out, the cylinder fails safely to the extended state during a compressed air loss, making it highly effective for spring-open and air-close mechanisms.
For applications needing position feedback, the built-in -S piston magnet allows direct mounting of CMSG, DMSG, or EMSG sensors. End-of-stroke deceleration is handled by fixed TPU bumper pads rather than an adjustable air cushion, and the rear of the body features a CA pivot cover. In practical lifting terms, the 434.8 N pull figure translates to a safe working load of roughly 261 N, or about 22.2 kg of vertical lift capacity when applying a 2:1 safety margin. This compact riveted body is also notably shorter than an equivalent ISO 6432 cylinder of the same bore and stroke, saving valuable machine footprint without conforming to that standard.
Airtac MTF Mini Cylinder MTF40X20SCA Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X20SCA |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MTF40X20SCA
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MTF40X20SCA Is Used
Heavy-Duty Tensioning
Pulls cables or webs taut with 434.8 N of force at 0.5 MPa, releasing the tension automatically to a relaxed state when air pressure is removed.
Spring-Open Gate Valves
Holds a gate open via the internal spring and uses compressed air through the 1/4 inch port to pull the valve closed securely on command.
Fail-Safe Lifting Hooks
Uses the CA pivot mount to swing a 22 kg load out of the way, relying on the spring to push the rod back to the extended safe position upon air loss.
Is the Airtac MTF Mini Cylinder MTF40X20SCA the Right Cylinder?
When sizing this 40 mm bore unit, compare its 434.8 N pull at 0.5 MPa against the next size down: an MTF32 provides 266.8 N at the same pressure, which may be insufficient for heavy tensioning. Since 40 mm is the largest available bore in the MTF family, tasks requiring even greater pull force will need a different cylinder system entirely. Ensure your air supply maintains at least the 0.2 MPa floor required to overcome the internal spring before retraction can begin.
This specific configuration ships with a CA pivot back cover, making it well-suited for pivoting clevis mounts where the cylinder must articulate during the stroke. The -S magnet option is included here, meaning the cylinder is ready to accept CMSG, DMSG, or EMSG switches for end-of-stroke detection; a non-S SKU cannot take a sensor. You can also adapt the mounting via LB foot brackets, FA flanges, or TC trunnion accessories depending on your frame constraints.
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 MTF40X20SCA 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 return spring, with a maximum pressure limit of 1.0 MPa.
The internal spring constantly extends the rod, so if air pressure is lost, the cylinder fails safely to the fully extended position rather than holding a mid-stroke load. The included -S magnet enables position detection using CMSG, DMSG, or EMSG switches.
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