Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 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 MFC40X70U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder tackles heavy loads with precision. The riveted aluminium covers and SUS304 stainless barrel resist mild corrosion and washdown, while the U-type flat-end rear cover suits tight rear-clearance installations. For the same 40 mm bore and 70 mm stroke, the JIS-standard body is physically shorter than an ISO 6432 cylinder, saving valuable machine space.
A variable air cushion at both ends lets you dial in the needle valve to absorb high-speed end-of-stroke shock, protecting payloads and cutting noise. Derived from the 0.5 MPa push rating, the safe working load is roughly 377 N, translating to a vertical lift of about 32 kg with a 2:1 safety margin. Note this specific SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors without upgrading to an -S variant.
Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U Technical Specifications
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U |
|---|---|
| Series | MFC JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 MFC40X70U
| MFC | JIS-standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | 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 MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U Is Used
Heavy Press Assembly
Pushes bearings into housings using the 879.6 N force available at 0.7 MPa, relying on the adjustable air cushion to prevent impact damage at the stroke end.
Pallet Diverting
Extends a 70 mm stroke to reposition heavy pallets, with the U-type flat-end cover allowing flush mounting against the conveyor frame.
Carton Sealing Clamp
Holds large cartons steady during the sealing process; the SUS304 stainless barrel withstands occasional washdowns in packaging facilities.
Is the Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC40X70U the Right Cylinder?
If 628.3 N at 0.5 MPa is excessive, the smaller MFC32 bore provides 402.2 N of push force; no larger MFC bore exists above 40 mm. The adjustable air cushion is essential when cycling at high speeds or moving heavy masses, as it decelerates the piston smoothly. It is strictly a deceleration device, not a brake.
Because this is a plain cylinder, the piston will drift if air pressure drops or the valve is centered, so fit an external rod lock or pilot-operated check valve for suspended loads. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets. The 1/4" port handles the air flow for this 40 mm bore, and you must specify an -S model 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 0.15 – 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 MFC40X70U FAQ
This 40 mm bore cylinder features a 1/4" air port and an M14x1.5 male rod 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, this specific SKU does not include a piston magnet, meaning it cannot support CMSG, DMSG, or EMSG switches. You must select the -S variant of the MFC to enable magnetic sensing. The variable air cushion at both ends functions solely to decelerate the load near the stroke end, not to hold position.
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