Airtac MTF Mini Cylinder MTF20X25SCM
The AirTAC Airtac MTF Mini Cylinder MTF20X25SCM is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 25mm stroke, 1/8" 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.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeSingle acting, pull (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF20X25SCM
Delivering 93.4 N of net pull force at 0.5 MPa, the AirTAC MTF20X25SCM is a JIS-standard round-body mini cylinder built for single-acting pull operation. A built-in spring holds the rod extended at rest, while supplying air to the 1/8 inch port retracts it. Because the internal spring constantly pushes outward, the cylinder automatically fails to the extended position if air pressure drops, providing an inherent spring-open fail-safe.
The SUS304 stainless steel barrel and riveted aluminium covers yield a shorter mounting envelope than a comparable ISO 6432 unit while resisting mild washdown corrosion. Equipped with a CM round-end rear cover and an M8x1.25 male rod thread, this -S variant contains a piston magnet for CMSG, DMSG, or EMSG position sensing. For sizing loads against gravity, its effective vertical lift is about 4.8 kg using a conservative 2:1 safety margin.
Airtac MTF Mini Cylinder MTF20X25SCM Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF20X25SCM |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Single acting, pull (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Pull force (spring return) |
|---|---|
| 0.5 MPa | 93.4 N |
| 0.7 MPa | 146.1 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 MTF20X25SCM
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 20 | 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 MTF20X25SCM Is Used
Tension Control
Maintains steady pulling tension on filaments or webs by retracting the 8 mm rod against the spring, automatically releasing the load if air fails.
Lid Lifting
Uses the spring to push and hold a cover open, then applies 93.4 N of pull at 0.5 MPa to draw the lid closed securely.
Part Retraction
Pulls a lightweight 4.8 kg fixture out of the workspace during machining cycles, relying on the spring to push it back to a safe extended rest.
Is the Airtac MTF Mini Cylinder MTF20X25SCM the Right Cylinder?
When sizing this 20 mm bore unit, the 93.4 N pull force at 0.5 MPa translates to a safe working load of roughly 56 N. If your application requires less retraction force, note that 20 mm is the smallest available MTF bore. Stepping up to the MTF25 provides 153.6 N at 0.5 MPa for heavier tensioning demands. Operating pressure must remain between 0.2 and 1.0 MPa, as a minimum of 0.2 MPa is required to overcome the internal spring.
This single-acting pull configuration fits spring-open, air-close mechanisms perfectly. Mounting flexibility is provided through LB foot, FA flange, SDB pivot, or TC trunnion brackets. Because this SKU includes the -S magnet option, it is fully compatible with CMSG, DMSG, and EMSG electronic or reed 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 MTF20X25SCM FAQ
It generates 93.4 N of pull force at 0.5 MPa and 146.1 N at 0.7 MPa. The cylinder requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring, with a maximum limit of 1.0 MPa.
The spring constantly drives the rod to the extended position. If air pressure is lost, the cylinder fails safely to the extended state and cannot hold a mid-stroke load. This -S model also includes a magnet for CMSG, DMSG, or EMSG sensors.
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