Airtac MSF Single Acting Mini Cylinder MSF40X20CM
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X20CM is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 mm
- Port size1/4"
- Acting typeSingle acting, push (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MSF Single Acting Mini Cylinder MSF40X20CM
Delivering 535.3 N of push force at 0.5 MPa, this AirTAC MSF40X20CM mini cylinder uses air to extend the rod and an internal spring to retract it. Because it is single-acting, you only pipe and valve one 1/4" port, which simplifies automation. The quoted force is already net of the return spring, yielding a safe working load of about 321 N or a 27.3 kg vertical lift with a 2:1 margin.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, it occupies a shorter mounting envelope than an ISO 6432 cylinder of the same bore and stroke. The rear CM round-end cover suits compact pivot arrangements. This SKU lacks the -S magnet, so it cannot host CMSG, DMSG, or EMSG switches.
Airtac MSF Single Acting Mini Cylinder MSF40X20CM Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X20CM |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Single acting, push (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 | Push force (spring return) |
|---|---|
| 0.5 MPa | 535.3 N |
| 0.7 MPa | 786.5 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 MSF40X20CM
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | 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 MSF Single Acting Mini Cylinder MSF40X20CM Is Used
Heavy Part Clamping
Exerts up to 786.5 N at 0.7 MPa to secure heavy workpieces, releasing automatically to the retracted rest position when air drops.
Product Ejection
Uses the 535.3 N push stroke to kick finished components off a line, relying on the internal spring to reset the plunger quickly.
Pallet Gating
Handles robust diverting or stopping duties on conveyors, using the fixed TPU bumper pads to absorb the impact at stroke end.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X20CM the Right Cylinder?
When sizing this 40 mm bore, step down to an MSF32 if 323.3 N at 0.5 MPa is sufficient, or stay here for the full 535.3 N output, as 40 mm is the largest available MSF bore. Spring-return push action fits clamping, ejecting, and gating tasks where the tool must default to the retracted position on air loss. Maintain at least 0.2 MPa operating pressure so air overcomes the spring. Mount via LB foot, FA flange, SDB pivot, or TC trunnion; choose an -S variant if position sensing is required.
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 MSF40X20CM FAQ
This single-acting cylinder provides a net push force of 535.3 N at 0.5 MPa and 786.5 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring, with a maximum limit of 1.0 MPa.
No. On air loss the spring drives the rod to the retracted position, so it cannot hold an arbitrary mid-stroke load; use a double-acting MF with an external rod lock for that. Also, this SKU lacks a magnet, so it cannot take CMSG, DMSG, or EMG sensors without the -S option.
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