Airtac MTF Mini Cylinder MTF20X20U
The AirTAC Airtac MTF Mini Cylinder MTF20X20U is a genuine single acting, pull (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 20mm 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
- Stroke20 mm
- Port size1/8"
- Acting typeSingle acting, pull (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MTF Mini Cylinder MTF20X20U
Delivering a net pull force of 93.4 N at 0.5 MPa, this JIS-standard round-body mini cylinder is built for single-acting pull operations. The internal spring holds the piston rod normally extended, while supplying air to the 1/8" port retracts it. Because air loss causes the spring to drive the rod back out, it provides inherent fail-safe extension for tensioning or air-close tasks.
The SUS304 stainless steel barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of identical bore and stroke, while resisting mild washdown corrosion. This specific MTF20X20U configuration features a flat-end U back cover and fixed TPU bumper pads. It lacks the -S magnet option, meaning it cannot host CMSG, DMSG, or EMSG sensors. For sizing, its 93.4 N pull translates to a safe working load of roughly 56 N, or vertically lifting about 4.8 kg with a 2:1 margin.
Airtac MTF Mini Cylinder MTF20X20U Technical Specifications
| Model | Airtac MTF Mini Cylinder MTF20X20U |
|---|---|
| Series | MTF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 MTF20X20U
| MTF | JIS-standard round-body mini cylinder (single-acting pull, spring-return). |
|---|---|
| 20 | 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 MTF20X20U Is Used
Tensioning Mechanisms
Uses the 93.4 N pull force to draw back a belt or wire, automatically snapping back to the extended position if air pressure drops.
Air-Close Gates
Air retracts the rod to pull a small gate shut, while the internal spring forces it open by default for a safe fail-open state.
Light Retract Actions
Pulls lightweight 4.8 kg fixtures vertically out of the way using compressed air, relying on the spring to lower them back down.
Is the Airtac MTF Mini Cylinder MTF20X20U the Right Cylinder?
When sizing this 20 mm bore, note it delivers 93.4 N of pull at 0.5 MPa and 146.1 N at 0.7 MPa. If your application requires less force, there is no smaller MTF bore, so you must reduce pressure down to the 0.2 MPa floor. If you need more power, step up to the MTF25, which provides 153.6 N at 0.5 MPa.
This pull-type design fits spring-open/air-close mechanisms and return-to-extended fail-safes perfectly. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets. Since this SKU lacks a magnet, position sensing is impossible; choose an -S variant if you require CMSG or DMSG 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 MTF20X20U FAQ
This 20 mm bore cylinder provides a single-acting pull force of 93.4 N at 0.5 MPa and 146.1 N at 0.7 MPa, already net of the spring. It requires a minimum operating pressure of 0.2 MPa to overcome the spring and retract the rod.
No, this specific SKU does not include a magnet, so it cannot support CMSG, DMSG, or EMSG switches. You must select an -S variant for position sensing. Additionally, the internal spring always returns the rod to the extended position on air loss; it will not hold a mid-stroke load.
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