Airtac MTF Mini Cylinder MTF40X25SCM
The AirTAC Airtac MTF Mini Cylinder MTF40X25SCM 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 MTF40X25SCM
Delivering a robust 434.8 N of pull force at 0.5 MPa, this JIS-standard round-body mini cylinder utilizes a SUS304 stainless barrel and riveted aluminium covers to handle demanding tensioning tasks. The internal spring actively holds the piston rod in the extended position, while supplying 1/4" port air retracts it, ensuring the mechanism fails safely to the open state if air pressure drops. Because the body is physically shorter than a comparable ISO 6432 unit for the same 40 mm bore and 25 mm stroke, it saves valuable machine space without sacrificing washdown resistance.
The integrated -S piston magnet enables position tracking with CMSG, DMSG, or EMSG switches, while the CM round-end rear cover provides flexible mounting options. With fixed TPU bumper pads managing end-of-stroke deceleration across the 50-800 mm/s speed range, it yields a computed safe working load of roughly 261 N, which equates to lifting or holding about 22.2 kg vertically with a 2:1 safety margin.
Airtac MTF Mini Cylinder MTF40X25SCM Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF40X25SCM |
|---|---|
| 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 MTF40X25SCM
| 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 MTF40X25SCM Is Used
Heavy-Duty Clamping Release
Utilize the 434.8 N pull force to hold heavy workpieces securely during machining, relying on the spring to automatically open the clamp and eject the part safely upon air loss.
Pallet Gate Retraction
Employ the robust 40 mm bore to pull tensioned conveyor diverter gates closed against product flow, with the CM round-end cover allowing smooth pivot mounting.
Fail-Safe Door Latching
Keep access doors extended and locked by spring force in rest mode, using the 1/4" air port to retract the 16 mm rod and release the latch only when actively signaled.
Is the Airtac MTF Mini Cylinder MTF40X25SCM the Right Cylinder?
When sizing this 40 mm bore unit, verify your tension requirements against its 434.8 N pull at 0.5 MPa or 645.8 N at 0.7 MPa. If your load is lighter, stepping down to the MTF32 provides 266.8 N at 0.5 MPa; since 40 mm is the largest available MTF bore, any requirement exceeding 645.8 N will require a different cylinder family. Ensure your supply meets the 0.2 MPa minimum floor needed to overcome the internal spring before retraction can begin.
This single-acting pull configuration is ideal for spring-open, air-close operations like gripping or clamping where air loss must trigger a safe release. Combine the CM rear cover with LB foot, FA flange, SDB pivot, or TC trunnion mounts to fit your frame, and specify CMSG, DMSG, or EMSG sensors to utilize the built-in -S magnet.
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 MTF40X25SCM 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 drives the rod to the fully extended position, meaning a loss of air pressure forces the cylinder to fail safely open. It cannot hold a load at an arbitrary mid-stroke point; for mid-stroke holding, a double-acting MF cylinder with an external rod lock is required.
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