Airtac MTF Mini Cylinder MTF40X20CA
The AirTAC Airtac MTF Mini Cylinder MTF40X20CA 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 MTF40X20CA
Delivering a robust 434.8 N of net pull force at 0.5 MPa, this AirTAC MTF40X20CA is built for heavy-duty tensioning and air-close tasks. As a JIS-standard round-body mini cylinder, it features a SUS304 stainless barrel and riveted aluminium covers. Its riveted rolling-packed construction yields a shorter overall body than an ISO 6432 unit of identical bore and stroke, saving valuable machine space while resisting mild washdown corrosion.
The internal spring constantly pushes the 16 mm rod to the extended rest position, while supplying air to the 1/4" port retracts it against the load. Because the quoted force is already net of the spring, you can confidently apply a computed safe working load of roughly 261 N (about 60 percent of the 0.5 MPa rating). This translates to lifting or holding approximately 22.2 kg vertically when applying a conservative 2:1 safety margin. Note that this specific SKU lacks a magnet, meaning it cannot host CMSG, DMSG, or EMSG position sensors without upgrading to an -S variant.
Airtac MTF Mini Cylinder MTF40X20CA Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X20CA |
|---|---|
| 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 MTF40X20CA
| 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 MTF40X20CA Is Used
Heavy-Duty Tensioning
Applies up to 645.8 N of pulling force at 0.7 MPa to draw heavy belts, cables, or webbing tight before a secondary locking mechanism engages.
Spring-Open Gate Control
Holds a heavy access hatch or process valve open via air retraction, relying on the spring to positively drive the mechanism open upon air loss.
Fail-Safe Retraction Stop
Uses the 434.8 N pull at 0.5 MPa to pull a heavy stopper clear of a conveyor lane, ensuring the barrier physically snaps back into the blocking position if the air supply drops.
Is the Airtac MTF Mini Cylinder MTF40X20CA the Right Cylinder?
When sizing this 40 mm bore model, evaluate your tension requirements against its 645.8 N peak pull at 0.7 MPa. If your application demands less force, stepping down to the MTF32 yields 266.8 N at 0.5 MPa, representing the next available smaller bore option since no larger MTF frame exists. Ensure your air supply maintains at least the 0.2 MPa floor required to overcome the internal spring before retraction can begin.
This 20 mm stroke unit ships with a CA rear pivot cover, making it highly compatible with FA flange, LB foot, SDB pivot-block, or TC trunnion mounting arrangements for versatile integration. It relies on fixed TPU bumper pads for end-of-stroke deceleration rather than an adjustable air cushion. Keep in mind that because this base configuration omits the -S magnet, it cannot support magnetic 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 MTF40X20CA FAQ
This single-acting pull cylinder generates 434.8 N of net pull force 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 pressure of 1.0 MPa and a proof pressure of 1.5 MPa.
The spring constantly extends the rod, meaning the cylinder fails to the fully extended position on air loss rather than holding a mid-stroke load. It is not a controllable brake; for mid-stroke holding, a double-acting MF cylinder with an external rod lock is required. Additionally, this non-S SKU lacks a magnet for CMSG/DMSG/EMSG sensors.
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