Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU is a genuine double acting + cushion 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 typeDouble acting + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU
Delivering 628.3 N of push force at 0.5 MPa, this double-acting 40 mm bore mini cylinder handles heavy loads within a compact footprint. The riveted aluminium covers and SUS304 stainless barrel resist mild corrosion and washdown environments. For the same bore and stroke, this JIS-standard round body is noticeably shorter than an ISO 6432 cylinder, saving valuable mounting length. A built-in piston magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing.
A defining feature is the variable air cushion at both ends, which uses a needle valve to absorb end-of-stroke shock at high speeds, protecting the load and reducing noise compared to a fixed bumper. The U flat-end back cover provides a straightforward rear mounting face. With a safe working load of roughly 377 N (about 60% of the 0.5 MPa push force), it can lift approximately 32 kg vertically with a 2:1 safety margin. The 1/4" port and M14x1.5 male rod thread ensure robust pneumatic and mechanical connections for demanding cycles.
Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU Technical Specifications
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU |
|---|---|
| Series | MFC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 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 | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU
| MFC | JIS-standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU Is Used
Heavy Clamping
Provides 628.3 N of solid clamping force at 0.5 MPa for securing heavy metal components during machining, with the cushion absorbing the impact of rapid actuation.
Package Diversion
Drives robust routing gates on high-speed conveyors, using the U flat-end mount and variable air cushion to smoothly push heavy cartons without harsh slamming.
Vertical Lift Stops
Lifts roughly 32 kg loads vertically with a 2:1 safety margin, acting as a reliable elevator stop or short-stroke gate in material handling systems.
Is the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU the Right Cylinder?
When sizing this 40 mm bore unit, step down to the MFC32 if your application only requires 402.2 N of push force at 0.5 MPa, as no larger MFC bore exists for loads exceeding the 628.3 N provided here. The variable air cushion is essential when cycling at high speeds or moving heavy masses, allowing you to tune the deceleration and prevent harsh impacts. Remember that the cushion only decelerates near the stroke end; it does not function as a lock or brake. If air pressure drops, the piston will drift, so you must add an external rod lock or pilot-operated check valve for secure load holding. The included -S magnet allows seamless integration with 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 0.15 – 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X20SU FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, the variable air cushion at both ends only decelerates the piston near the stroke end to reduce shock; it is not a brake or lock. If air pressure is lost or the valve is centered, the piston will drift. You must use an external rod lock or pilot check valve to hold a load securely.
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