Airtac MSF Single Acting Mini Cylinder MSF20X50U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF20X50U is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MSF20X50U
Delivering 117.5 N of push force at 0.5 MPa (181.3 N at 0.7 MPa), this 20 mm bore mini cylinder uses air to extend the rod and an internal spring to retract it. Because you only pipe one 1/8" port, plumbing is simpler and the cylinder fails to the retracted position on air loss. The quoted forces are already net of the return spring.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, it is shorter than an ISO 6432 cylinder for the same 50 mm stroke, saving mounting length. This SKU lacks a magnet, so it cannot take position sensors; adding the -S option enables CMSG, DMSG or EMSG switches. The U flat-end back cover provides a flush rear mounting face. For sizing, a practical safe working load is roughly 71 N, or about 6 kg of vertical lift with a 2:1 margin.
Airtac MSF Single Acting Mini Cylinder MSF20X50U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF20X50U |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MSF20X50U
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MSF20X50U Is Used
Light-Duty Clamping
Clamps small parts securely with 117.5 N of push force, relying on the spring to release the part automatically when air is removed.
Product Ejection
Pushes lightweight items off a conveyor belt; the single-acting design simplifies valve requirements and ensures the rod retracts safely on air loss.
Vertical Lift Gates
Raises small gates or diverters holding up to 6 kg, using the flat U back cover for flush mounting in compact machinery.
Is the Airtac MSF Single Acting Mini Cylinder MSF20X50U the Right Cylinder?
If 117.5 N at 0.5 MPa is insufficient, step up to the MSF25, which provides 192.8 N at the same pressure. As this is the smallest available bore, there is no smaller MSF option. Maintain at least 0.2 MPa of air pressure to overcome the return spring; below that floor, the spring wins and the rod will not extend. Fixed TPU bumper pads absorb end-of-stroke impact across the 50-800 mm/s speed range.
Mount this 20 mm bore unit using LB foot brackets, FA flanges, SDB pivot blocks or TC trunnions. The male M8x1.25 rod thread handles the load, while the U flat-end back cover suits tight rear-clearance installations. Remember that without the -S magnet option, this cylinder cannot support CMSG, DMSG or EMSG sensors.
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 MSF20X50U FAQ
The 20 mm bore generates 117.5 N of push force at 0.5 MPa and 181.3 N at 0.7 MPa. These figures are net of the return spring. You must supply at least 0.2 MPa of air pressure to overcome the spring and extend the rod.
No, this specific SKU does not include a magnet, so it cannot support CMSG, DMSG or EMSG switches. You would need the -S variant for sensing. The SUS304 stainless barrel resists mild corrosion, and the spring ensures the rod returns to rest on air loss, though it will not hold a mid-stroke load.
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