Airtac MSF Single Acting Mini Cylinder MSF20X35SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF20X35SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 35mm 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
- Stroke35 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 MSF20X35SU
Generating 117.5 N of push force at 0.5 MPa, this AirTAC MSF20X35SU mini cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is single-acting, you only pipe and valve one 1/8" port, simplifying your setup. The quoted force is already net of the return spring, and it provides a safe working load of roughly 71 N or a 2:1 vertical lift of about 6 kg.
Built as a JIS-standard round-body unit with a SUS304 stainless steel barrel and riveted aluminium covers, it is shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. The U flat-end rear cover and fixed TPU bumper pads handle end-of-stroke impact. Since this SKU includes the -S option, a built-in piston magnet allows position sensing with CMSG, DMSG, or EMSG switches.
Airtac MSF Single Acting Mini Cylinder MSF20X35SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF20X35SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 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 MSF20X35SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×35 | 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 MSF20X35SU Is Used
Spring-Return Clamping
Clamps light parts under a 71 N safe load during machining, automatically releasing the workpiece if compressed air is lost.
Part Ejector
Pushes finished components off a conveyor line with 117.5 N of force, relying on the internal spring to retract the rod quickly between cycles.
Divert Gate Actuator
Extends a routing flap to sort items on a packaging line, safely defaulting to the retracted home position during an emergency stop.
Is the Airtac MSF Single Acting Mini Cylinder MSF20X35SU the Right Cylinder?
Choose this 20 mm bore if your task requires a safe working load around 71 N; if you need more thrust, step up to the MSF25 which provides 192.8 N at 0.5 MPa. Single-acting push cylinders excel in spring-return clamping, ejecting, or gating tasks where the mechanism must fail to the retracted position on air loss. Ensure your supply meets the 0.2 MPa floor required to overcome the return spring. For mounting, pair the U back cover with LB foot, FA flange, SDB pivot, or TC trunnion brackets, and use CMSG/DMSG/EMSG sensors for position feedback.
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 MSF20X35SU FAQ
This single-acting cylinder generates a net push force of 117.5 N at 0.5 MPa and 181.3 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring and has a maximum pressure limit of 1.0 MPa.
No, the spring constantly drives the rod to the retracted rest position on air loss, so it cannot hold an arbitrary mid-stroke load. For a held mid-stroke load, use a double-acting MF cylinder with an external rod lock. This model also features a SUS304 stainless barrel and a -S magnet for CMSG/DMSG/EMSG sensors.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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