The AirTAC Airtac MF Mini Cylinders MF40X40CAT is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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.
Pushing a full 628 N (64 kgf) at 0.5 MPa and 880 N at 0.7 MPa, the MF40X40CAT is a double-acting JIS-standard round-body mini cylinder with NPT 1/4 in tapered ports. The trailing CA in the code sets the pivot back cover, and the trailing T switches the ports to NPT - the tapered thread that seals on itself and matches North-American pipe fittings. The 40 mm bore rides on a 16 mm rod with an M14x1.5 male thread. A riveted SUS304 stainless barrel with rolling-packed aluminium covers shrugs off washdown and mild corrosion, and because the MF body is shorter than an ISO 6432 cylinder of the same bore and stroke, it slips into tighter fixtures. Fixed TPU bumper pads and a front-cover anti-impact pad soften both stroke ends. For sizing, budget roughly 377 N of real work at 0.5 MPa (60% of the push rating), or count on lifting about 32 kg vertically with a 2:1 margin.
| Model | Airtac MF Mini Cylinders MF40X40CAT |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| 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 | Fixed TPU bumper pads |
| 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.
| 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.
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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.
A 628 N push at 0.5 MPa drives a die-mark or date-code stamp into soft aluminium profiles, and the 40 mm stroke gives exactly the penetration travel a marking head needs.
With a 2:1 margin the cylinder raises about 32 kg vertically, enough to lift indexed gate or pallet fixtures between stations while the CA pivot back cover absorbs the swing.
Weld jigs that need a firm 350-400 N clamp force on brackets use the bore-40 output directly, and the SUS304 barrel tolerates the spatter and coolant mist around weld cells.
Step down to the MF32X40 (402 N push at 0.5 MPa) if your load is under about 240 N of working force; there is no MF bore above 40, so the MF40X40CAT is the top of the range. This is a 40 mm standard stroke, well inside the 500 mm max. Remember the plain MF drifts when air is lost or the valve centres - add an external rod lock or a pilot check valve if the load must stay put. Mount on LB foot, FA flange, SDB pivot block or TC trunnion; the CA pivot back cover on this SKU pairs naturally with SDB or TC for swinging motion. As shipped without the -S magnet it cannot carry a CMSG, DMSG or EMSG switch - order the -S version if you need position sensing.
Quick checklist
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa those rise to 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Running pressure spans 0.15-1.0 MPa and speed 30-800 mm/s on this double-acting 40 mm bore with a 16 mm rod.
The trailing T in MF40X40CAT specifies 1/4 in NPT tapered ports, the standard across North-American plumbing; the taper seals on the thread itself, so you mate it directly with existing NPT elbows and manifolds instead of adapting from the default PT (Rc) version. The CA suffix also means a pivot back cover, and without the -S magnet option this SKU accepts no CMSG, DMSG or EMSG switch.
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