Airtac MSF Single Acting Mini Cylinder MSF20X70U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF20X70U is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 70mm 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
- Stroke70 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MSF Single Acting Mini Cylinder MSF20X70U
Delivering 117.5 N of push at 0.5 MPa (181.3 N at 0.7 MPa), this single-acting cylinder uses air to extend the rod and an internal spring to retract it. Because it only needs one 1/8" air line, plumbing is simple, and it safely fails to the retracted position on air loss. The 70 mm stroke operates within a JIS-standard round-body format that is physically shorter than an ISO 6432 unit of the same size, saving valuable mounting length.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments. With a safe working load of roughly 71 N, it can vertically lift about 6 kg with a 2:1 safety margin. This specific SKU lacks a magnet and cannot host position sensors, though the -S variant enables CMSG, DMSG, or EMSG switches. End-of-stroke deceleration is handled by fixed TPU bumper pads.
Airtac MSF Single Acting Mini Cylinder MSF20X70U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF20X70U |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 mm |
| Acting type | Single acting, push (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 | Push force (spring return) |
|---|---|
| 0.5 MPa | 117.5 N |
| 0.7 MPa | 181.3 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MSF Single Acting Mini Cylinder MSF20X70U
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 MSF Single Acting Mini Cylinder MSF20X70U Is Used
Spring-Return Clamping
Clamps light workpieces with 117.5 N of push at 0.5 MPa, automatically releasing to the retracted position when air pressure is removed.
Part Ejection
Ejects small components along the 70 mm stroke using a single 1/8" air line, relying on the internal spring to reset the rod.
Light Lift Gates
Actuates lightweight routing gates, safely lifting loads around 6 kg with a 2:1 margin before spring-returning to rest.
Is the Airtac MSF Single Acting Mini Cylinder MSF20X70U the Right Cylinder?
When sizing this 20 mm bore, step up to the MSF25 if you need more force, as it provides 192.8 N at 0.5 MPa; there is no smaller MSF bore below 20. This model fits applications requiring a spring-return clamp or ejector, but remember the 0.2 MPa pressure floor required to overcome the return spring. It features a U flat-end rear cover and accepts LB foot, FA flange, SDB pivot, or TC trunnion mounts. Because this SKU is not -S, it cannot take a magnetic sensor.
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 MSF Single Acting Mini Cylinder MSF20X70U FAQ
The single-acting push force is 117.5 N at 0.5 MPa and 181.3 N at 0.7 MPa, already net of the return spring. It requires a minimum operating pressure of 0.2 MPa to overcome the spring and extend the rod, with a maximum pressure of 1.0 MPa.
No. On air loss, the spring drives the rod to the retracted position; it cannot hold an arbitrary mid-stroke load (use a double-acting MF with a rod lock for that). Additionally, this SKU lacks a magnet, so it cannot host CMSG/DMSG/EMSG sensors unless you specify the -S variant.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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